N-octadecyl Acrylate Research Articles

Silk Fibroin-Based Multiple-Shape-Memory Organohydrogels.

Organohydrogels (OHGs) are intriguing materials due to their unique composition of both hydrophilic and hydrophobic domains. This antagonistic nature endows the OHGs with several remarkable properties, making them highly versatile for various applications. We present here a simple and inexpensive approach to fabricate silk fibroin (SF)-based OHGs with multistage switching mechanics and viscoelasticity. The continuous hydrophilic phase of the OHG precursor consists of an aqueous SF solution, while the hydrophobic droplet phase consists of a crystallizable n-octadecyl acrylate (C18A) monomer and several long-chain saturated hydrocarbons (HCs) with various chain lengths between 14 and 32 carbon atoms, namely, n-tetradecane, n-octadecane, n-docosane, n-dotriacontane, and 1-docosanol. After the addition of a C18A/HC mixture containing Irgacure photoinitiator into the continuous aqueous SF phase under stirring, a stable oil-in-water emulsion was obtained, which was then photopolymerized at 23 ± 2 °C to obtain nonswelling OHGs with multiple-shape-memory behavior. By changing the chain length and mass proportion of HCs, a series of OHGs with tunable transition temperatures could be obtained, meeting various applications. OHGs containing dimer, trimer, and quadruple combinations of in situ-formed poly(C18A) and HC microinclusions exhibit effective triple- or quintuple-shape memory whose shape-recovery temperatures could be adjusted over a wide range, e.g., between 7 and 70 °C.

Smart-Adhesive, Breathable and Waterproof Fibrous Electronic Skins.

For the need of direct contact with the skin, electronic skins (E-skins)should not only fulfill electric functions, but also ensure comfort during wearing, including permeability, waterproofness, and easy removal. Herein, the study has developed a self-adhesive, detach-on-demand, breathable, and waterproof E-skin (PDSC) for motion sensing and wearable comfort by electrospinning styrene-isoprene block copolymer rubber with carbon black nanosheets as the sensing layer and liner copolymers of N, N-dimethylacrylamide, n-octadecyl acrylate and lauryl methacrylate as the adhesive layer. The high elasticity and microfiber network structure endow the PDSC with good sensitivity and high linearity for strain sensing. The hydrophobic and crystallizable adhesive layer ensures robust, waterproof, and detaching-on-demand skin adhesion. Meanwhile, the fiber structure enables the PDSC good air and water permeability. The integration of electric and wearable functions endows the PDSC with great potential for motion sensing during human activities as both the sensing and wearable performances.

Silk Fibroin-Based Shape-Memory Organohydrogels with Semicrystalline Microinclusions.

Inspired by nature, we designed organohydrogels (OHGs) consisting of a silk fibroin (SF) hydrogel as the continuous phase and the hydrophobic microinclusions based on semicrystalline poly(n-octadecyl acrylate) (PC18A) as the dispersed phase. SF acts as a self-emulsifier to obtain oil-in-water emulsions, and hence, it is a versatile and green alternative to chemical emulsifiers. We first prepared a stable oil-in-water emulsion without an external emulsifier by dispersing the n-octadecyl acrylate (C18A) monomer in an aqueous SF solution. To stabilize the emulsions for longer times, gelation in the continuous SF phase was induced by the addition of ethanol, which is known to trigger the conformational transition in SF from random coil to β-sheet structures. In the second step, in situ polymerization of C18A droplets in the emulsion system was conducted under UV light in the presence of a photoinitiator to obtain high-strength OHGs with shape-memory function, and good cytocompatibility. The incorporation of hydrophilic N,N-dimethylacrylamide and noncrystallizable hydrophobic lauryl methacrylate units in the hydrogel and organogel phases of OHGs, respectively, further improved their mechanical and shape-memory properties. The shape-memory OHGs presented here exhibit switchable viscoelasticity and mechanics, a high Young's modulus (up to 4.3 ± 0.1 MPa), compressive strength (up to 2.5 ± 0.1 MPa), and toughness (up to 0.68 MPa).

Butyl rubber as a macro-cross-linker in the preparation of a shape-memory and self-healing polymer

Recently, a simple strategy was developed for preparing interconnected interpenetrating polymer networks (IPNs) based on butyl rubber (IIR) and poly(n-octadecyl acrylate) (PC18A). Solvent-free UV polymerization of n-octadecyl acrylate (C18A) monomer in the melt of IIR at ambient temperature resulted in IPNs with self-healing and shape-memory functions. Here, we demonstrate that the use of IIR grafted with acrylic acid, methacrylic acid, and 10-undecenoic acid instead of unmodified IIR provides a significant improvement in the mechanical properties of IPNs. Differential scanning calorimetry, small-angle x-ray scattering, and wide-angle x-ray scattering analysis reveal side-by-side packing of C18 side chains of PC18A to form lamellar crystals with a melting temperature Tm between 46 and 52 °C. Transmission electron microscopy analysis indicates the existence of quasispherical nanoparticles composed of crystalline domains, which are dispersed in a continuous interpenetrating rubber-PC18A matrix. This microstructure provides them a complete self-recovery behavior induced by heating and an efficient shape-memory function. IPNs exhibit around tenfold higher chemical cross-link density as compared to those prepared from the native IIR, reflecting the effect of pendant vinyl groups on the extent of covalent interconnections between the IIR and PC18A components. The type of the grafted monomers significantly affects the mechanical performance of IPNs, which can be explained with the individual contributions of chemical and physical cross-links to the total cross-link density. The amount of the grafted rubbers in IPN could be further increased up to 80 wt. % by the incorporation of toluene into the reaction system, resulting in IPNs with a wide range of tunable thermal and mechanical properties.

Sterilization studies of hydrogel nanocomposites designed for possible biomedical applications before in vivo research

This study emphasized the importance of hydrogel-based therapy in repairing cartilage tissue and discussed the nanoscopic requirements for the physical sterilization of hydrogels, which are repairable, biochemically compatible with cartilage structure, and shape memory under mechanical effects.The nanostructured and the shape memory hydrogel composites, previously designed, synthesized, and nano-structurally characterized by our group, were used as material in the present study. Samples are including poly(N,N-dimethylacrylamide) (poly (DMAA) chains, n-octadecyl acrylate (C18A) segments and with/without lauryl methacrylate (LM).The study consists of four main sections in which physical sterilization processes (with electromagnetic waves from low energy (UV) to high energy (X-ray and Gamma-ray) are applied, structural changes are determined at microscopic and nanoscopic scale, and biofilm formations in the mentioned hydrogel materials are evaluated.The present study investigated these hydrogels' potential as artificial cartilage or cartilage tissue scaffolds. To initiate in vivo studies, it was aimed to determine the most appropriate physical sterilization method.In the result of the study, the most convenient hydrogel sample for surgical (in vivo) research, the useful physical sterilization methods, and the ability to resist biofilm formation was determined for the sample of N:3, [DMMA/C18A/LM, (70/30/0.0) l (Pre stretching ratio) = 1.8]. UV applications were also determined as the most generally suitable sterilization method for these hydrogels. As the pre-stretching ratio increases, the emergence of more compact and globular nano formations in hydrogel structures also affects the bioactive properties. It was also shown that, with the help of the usage of energetic electromagnetic waves for sterilizations, the new 3D nano aggregation morphologies might be created in the hydrogel structures.

Silk Fibroin Cryogel Building Adaptive Organohydrogels with Switching Mechanics and Viscoelasticity

In contrast to synthetic gels, their biological counterparts such as cells and tissues have synergistic biphasic components containing both hydrophilic and lyophilic phases, providing them some special abilities including adaptive biomechanics and freezing tolerance. Hydrogels containing both hydrophilic and lyophilic phases, referred to as organohydrogels (OHGs), are capable of mimicking the biological systems, and they might have great potential in various applications. Here, we present a facile strategy to obtain adaptive OHGs with tunable and programmable mechanics and viscoelasticity. We utilize a hydrophilic cryogel scaffold as the continuous phase of OHGs, while the pores of the scaffold act as the reaction loci for the formation of organogel microinclusions. Thus, we first prepared mechanically robust cryogels based on silk fibroin (SF) via cryogelation reactions at −18 °C. The cryogels with 94% porosity containing interconnected μm-sized pores were then immersed in an ethanolic solution of acrylic acid (AAc), n-octadecyl acrylate (C18A), N,N′-methylenebis(acrylamide), and a free-radical initiator. Polymerization reactions conducted within the pores of the cryogels lead to mechanically strong adaptive OHGs consisting of a SF scaffold containing semi-crystalline poly(AAc-co-C18A) organogel microinclusions. The mechanical strength of OHGs is much higher than that of their components due to the significant energy dissipation in the OHG networks. Depending on the amount of the crystallizable C18A monomer units, the melting temperature Tm and the degree of crystallinity of OHGs could be varied between 49 and 54 °C and 1.3 and13%, respectively. The crystallinity created in OHGs provided them switchable mechanics and viscoelasticity in response to a temperature change between below and above Tm. All OHGs exhibited shape-memory function with a shape-recovery ratio of more than 92%. The strategy developed here to obtain high-strength smart OHGs is suitable for a wide variety of combinations of hydrophilic scaffolds and organogels.

Butyl rubber-based interpenetrating polymer networks with side chain crystallinity: Self-healing and shape-memory polymers with tunable thermal and mechanical properties

A self-healing and shape-memory interpenetrating polymer network (IPN) is produced by UV polymerization of n-octadecyl acrylate (C18A) monomer in a toluene solution of butyl rubber (isobutylene-isoprene rubber, IIR) using Irgacure 2959 photoinitiator at ambient temperature. IPNs containing 20–80 wt% IIR have crystalline domains formed by side-by-side packed octadecyl side chains aligned perpendicular to the poly(C18A) (PC18A) backbone. TEM images reveal that the morphology of IPNs consists of crystalline domains dispersed in a continuous amorphous matrix where the size of the dispersed phase could be adjusted between µm and nm level by changing the amount of IIR. Calculations indicate that the effective cross-link density of IPNs is mainly determined by their crystalline domains followed by hydrophobic associations while the chemical cross-links between IIR and PC18A components are negligible. We also show that the crystalline domains acting as sacrificial bonds dissipate energy under strain leading to a significant toughness improvement. IPNs exhibit tunable melting temperature (46–50 °C), crystallinity (1.5–25%), Young’s modulus (0.6–35 MPa), toughness (1.3–12 MPa), and a stretchability of up to 1200% by varying the amount of IIR component. What is more, they also exhibit temperature induced healing behavior with 59–77% efficiency, and an effective shape-memory function. The strategy presented here is applicable for the preparation of IPNs based on various rubbers and poly(n-alkyl(meth)acrylates) with long alkyl side chains.

Solvent-Free UV Polymerization of n-Octadecyl Acrylate in Butyl Rubber: A Simple Way to Produce Tough and Smart Polymeric Materials at Ambient Temperature.

One of the most fascinating challenges in recent years has been to produce mechanically robust and tough polymers with smart functions such as self-healing and shape-memory behavior. Here, we report a simple and versatile strategy for the preparation of a highly tough and highly stretchable interconnected interpenetrating polymer network (c-IPN) based on butyl rubber (IIR) and poly(n-octadecyl acrylate) (PC18A) with thermally induced healing and shape-memory functions. Solvent-free UV polymerization of n-octadecyl acrylate (C18A) at 30 ± 2 °C in the presence of IIR leads to IIR/PC18A c-IPNs with sea-island or co-continuous morphologies depending on their IIR contents. The lamellar crystals with a melting temperature Tm of 51-52 °C formed by side-by-side packed octadecyl (C18) side chains are responsible for more than 99% of effective cross-links in c-IPNs, the rest being hydrophobic associations and chemical cross-links. The c-IPNs exhibit varying stiffness (9-34 MPa), stretchability (72-740%), and a significantly higher toughness (1.9-12 MJ·m-3) than their components, which can be tuned by changing the IIR/PC18A weight ratio. The properties of c-IPNs could also be tuned by incorporating a second, noncrystallizable hydrophobic monomer, namely, lauryl methacrylate (C12M), in the melt mixture. We show that the lamellar clusters acting as sacrificial bonds break at the yield point by dissipation of energy, while the ductile amorphous continuous phase keeps the structure together, leading to the toughness improvement of c-IPNs. They exhibit a two-step healing process with >90% healing efficiency with respect to the modulus and a complete shape-recovery ratio induced by heating above Tm of alkyl crystals. The temperature-induced healing occurs via a quick step where C18 bridges form between the damaged surfaces followed by a slow step controlled by the interdiffusion of C18A segments in the bulk. We also show that the strategy developed here is suitable for a variety of rubbers and n-alkyl (meth)acrylates of various side-chain lengths.

Cross-linked Poly(Octadecyl Acrylate)/Polybutadiene Shape Memory Polymer Blends Prepared by Simultaneous Free Radical Cross-linking, Grafting and Polymerization of Octadecyl Acrylate/Polybutadiene Blends.

A semi-crystalline, shape memory polymer (SMP) is fabricated by free radical cross-linking, polymerization, and grafting in a blend of n-octadecyl acrylate and polybutadiene (PB). Poly(n-octadecyl acrylate) (PODA) is a side-chain crystalline polymer, which serves as the structure-fixing network counterbalancing the elastically deformed, cross-linked polymer network. At a constant 50/50 ratio of monomer and polymer the amount of free radical initiator, dicumyl peroxide (DCP) is varied from 1% to 5%w/w PB. From swelling measurements and calculation of the cross-link density it is determined that DCP produces greater than one cross-link per DCP molecule. It is found that lower cross-linking efficiency is favorable for higher shape fixity. This lower efficiency is found to produce a higher degree of crystallinity of the PODA in the 2-5% DCP samples, which is determined to be the main driver of higher shape fixity of the polymer. A SMP with >90% fixity and 100% recovery at uniaxial strains from 34-79% is achieved. This material should be useful for mold processing of shape memory articles. This approach provides a method to decouple the elastomeric and thermoplastic portions of a SMP to convert commodity elastomers into SMPs and tailor the shape memory response.

Highly stretchable and thermally healable polyampholyte hydrogels via hydrophobic modification

Aqueous solutions or gels of polyampholytes attract interest for more than half a century due to their several attractive properties. We present here thermally healable hydrophobically modified physical polyampholyte (PA) hydrogels based on oppositely charged 2-acrylamido-2-methylpropane-1-sulfonic acid sodium salt (AMPS) and (3-acrylamidopropyl) trimethylammonium chloride (APTAC) monomers. PA hydrogels were prepared via micellar polymerization technique in the presence of the hydrophobic monomer n-octadecyl acrylate (C18A) in aqueous sodium dodecyl sulfate (SDS) solutions. Charge-balanced PA hydrogels containing 60–90% water exhibit a high tensile strength and stretchability of up to 202 kPa and 1239%, respectively. Above 7 mol% C18A, swollen hydrogels containing around 90% water exhibit much better mechanical properties as compared with the corresponding as-prepared ones because of the stronger hydrophobic interactions in the absence of SDS micelles. Cut-and-heal tests conducted at 50 °C reveal a complete healing efficiency with respect to Young’s modulus for all as-prepared PA hydrogels within 1–4 h.

Effect of Hydration in Corona Layer on Structural Change of Thermo-Responsive Polymer Micelles.

The effect of hydration in corona layer on temperature responsiveness of polymer micelles consisting of poly(N-vinyl pyrrolidone)-block-poly(n-octadecyl acrylate) (PVP-b-PODA) was investigated. Small-angle X-ray scattering and dynamic light scattering showed two-step shape change of PVP-b-PODA micelles around 45 and 65 °C with elevating temperature, although only one-step shape change was observed at 45 °C in cooling process. In the first step, shape of PVP-b-PODA micelles was changed from disk to ellipsoidal oblate at the melting temperature (Tm) of PODA, although similar micelles consisting of another amphiphilic block copolymers containing PODA simply changed from disk to sphere at the Tm with elevating temperature. PVP-b-PODA micelles changed to spherical shape above 65 °C. Two-dimensional (2D) 1H-NMR showed the PVP chains were perfectly dehydrated above 65 °C. Therefore, it was suggested that the appearance of ellipsoidal shape between Tm of PODA and 65 °C was caused owing to shape memory effect of pseudo network of corona layer due to robust hydration of PVP chains.

Toughness improvement and anisotropy in semicrystalline physical hydrogels

A major challenge in the gel science is to create mechanically strong hydrogels with anisotropic properties as observed in many biological tissues. Here, we report a simple one-step method of producing high-strength physical hydrogels exhibiting microstructural and mechanical anisotropy. As the precursor material, we use semicrystalline shape-memory hydrogels consisting of poly(N, N-dimethylacrylamide) chains interconnected by n-octadecyl acrylate (C18A) segments forming crystalline domains and hydrophobic associations acting as switching segments and netpoints, respectively. To generate anisotropic microstructure, we impose a prestretching on the isotropic hydrogel sample above the melting temperature Tm of its crystalline domains followed by cooling below Tm under strain to fix the elongated shape of the gel sample. A significant microstructural and mechanical anisotropy was achieved that could be tuned by the magnitude of the prestretch ratio λo. Directional brittle-to-ductile and ductile-to-brittle transitions could be induced by adjusting the prestretch ratio λo. Small- and wide-angle X-ray scattering measurements and mechanical tests highlight a critical prestretch ratio λo at which the hydrogel exhibits the highest microstructural and mechanical anisotropy due to the finite extensibility of the network chains. At λo = 1.8, the hydrogel exhibits Young's moduli of 161 ± 14 and 76 ± 7 MPa, and toughness of 16 ± 1 and 1.3 ± 0.1 MJ m−3 along and perpendicular to the prestretching direction, respectively.

Yielding Behavior of Tough Semicrystalline Hydrogels

Supramolecular semicrystalline hydrogels are soft functional materials consisting of water-swollen hydrophilic polymer chains interconnected by hydrophobic segments forming lamellar crystals. Although such hydrogels with high crystallinity are mechanically strong, with elastic moduli and tensile strength of 80–300 MPa and 4–7 MPa, respectively, they are brittle and rupture at a stretch of less than 20% without yielding. Here, we report that the incorporation of a small amount of a weak hydrophobe into semicrystalline hydrogels significantly increases their toughness and stretchability without losing their high modulus and high strength. We design a highly entangled physical network based on poly(N,N-dimethylacrylamide) (PDMA) chains containing n-octadecyl acrylate (C18A) and lauryl methacrylate (C12M) segments with side chain lengths of 18 and 12 carbons, respectively. By including 0.1–0.4 mol % C12M into the PDMA backbone containing 30 mol % C18A segments, we were able to create more ordered and thinner ...

Melt-Processable Shape-Memory Hydrogels with Self-Healing Ability of High Mechanical Strength

We present here a synthetic strategy for the preparation of melt-processable shape-memory hydrogels with self-healing ability. The supramolecular hydrogel with a water content of 60–80 wt % consists of poly(acrylic acid) chains containing 20–50 mol % crystallizable n-octadecyl acrylate (C18A) segments together with surfactant micelles. The key of our approach to render the hydrogel melt-processable is the absence of chemical cross-links and the presence of surfactant micelles. At temperatures above the melting temperature Tm of the crystalline domains of alkyl side chains, the hydrogel liquefies due to the presence of surfactant micelles effective for solubilizing the hydrophobic C18A segments. At this stage, it can easily be shaped into any desired form by pouring into molds. Cooling below Tm and removing the surfactant from the gel network results in a hydrogel of any permanent shape with a particularly high compressive strength of 90 MPa and a Young’s modulus of 26 MPa. If the hydrogel was damaged on p...

Fabrication and Performances of Microencapsulated n-Alkanes with Copolymers Having n-Octadecyl Side Chains As Shells

Supercooling of microencapsulated phase change materials (MicroPCMs) is the major obstacle for the widespread application of MicroPCMs in the field of latent heat storage. This work develops a feasible approach to suppress supercooling of MicroPCMs. Microcapsules containing even n-alkanes (n-hexadecane, n-octadecane, and n-eicosane) with polymethyl methacrylate (PMMA) and various compositions of n-octadecyl acrylate (ODA)-MMA copolymeric shells (PODAMA) were fabricated through suspension-like polymerization. The fabrication and properties of MicroPCMs were investigated using Fourier transformed infrared spectroscopy (FTIR), a field-emission scanning electron microscope (FE-SEM), particle size distribution analysis, differential scanning calorimetry (DSC), and thermogravimetric analysis (TGA). The results show that a series of microcapsules with spherical shapes were successfully fabricated. The average diameters of the microcapsules were in the range 0.92–1.70 μm. The degree of supercooling of even n-alkanes encapsulated in PMMA microcapsules is approximately 8–10 °C. The degree of supercooling and content of n-alkanes decreased progressively with an increase of molar ratio of ODA in the synthesis; however, the thermal stabilities of the MicroPCMs varied slightly.

Shape Memory Hydrogels via Micellar Copolymerization of Acrylic Acid and n-Octadecyl Acrylate in Aqueous Media

A novel way for the production of shape memory hydrogels containing crystalline domains is described. Hydrogels were prepared by micellar copolymerization of acrylic acid with the hydrophobic comonomer n-octadecyl acrylate (C18) in an aqueous NaCl solution of sodium dodecyl sulfate (SDS). The presence of NaCl causes the SDS micelles to grow and thus enables solubilization of large amounts (16% w/v) of C18 in the micellar solution. DSC measurements show that the swollen hydrogels, possessing 61–84% water, melt and crystallize with a change in temperature. Independent of the hydrophobe level between 20 and 50 mol %, the melting and crystallization temperatures of the hydrogels are 48 ± 2 and 43 ± 2 °C, respectively. The hydrogels exhibit 3 orders of magnitude change in the elastic modulus when the temperature changes between below and above the melting temperature of the crystalline domains. The blocky structure of the network chains formed by micellar polymerization is responsible for the drastic change in...

Self-Assembly of Amphiphilic Block Copolymers Containing Poly(n-octadecyl acrylate) Block in Aqueous Solution

Synchrotron small-angle X-ray scattering (SAXS) experiments were carried out for poly(acrylic acid)-block-poly(n-octadecyl acrylate) (PAA-b-PODA) and PAA-b-PODA-b-PAA micelles in aqueous solutions. SAXS results indicated that PAA-b-PODA and PAA-b-PODA-b-PAA formed core-shell micelles with disk-like morphology below melting temperature of PODA in aqueous solutions. The thickness of PAA-b-PODA (diblock copolymer) micelle was larger than that of PAA-b-PODA-b-PAA (triblock copolymer) micelle. The difference of sizes between these micelles was related to difference of molecular architectures of PAA-b-PODA and PAA-b-PODA-b-PAA. PAA-b-PODA micelle showed morphological transition from disk to spherical shape with elevating temperature. On the contrary, PAA-b-PODA-b-PAA micelle maintained disk-like shape above melting temperature, although enlargement of micelle thickness is caused.

Thermoresponsive amphiphilic symmetrical triblock copolymers with a hydrophilic middle block made of poly(N-isopropylacrylamide): synthesis, self-organization, and hydrogel formation

Several series of symmetrical triblock copolymers were synthesized by the reversible addition fragmentation chain transfer method. They consist of a long block of poly(N-isopropylacrylamide) as hydrophilic, thermoresponsive middle block, which is end-capped by two small strongly hydrophobic blocks made from five different vinyl polymers. The association of the amphiphilic polymers was studied in dilute and concentrated aqueous solution. The polymer micelles found at low concentrations form hydrogels at high concentrations, typically above 30–35 wt.%. Hydrogel formation and the thermosensitive rheological behavior were studied exemplarily for copolymers with hydrophobic blocks of polystyrene, poly(2-ethylhexyl acrylate), and poly(n-octadecyl acrylate). All systems exhibited a cloud point around 30 °C. Heating beyond the cloud point initially favors hydrogel formation but continued heating results in macroscopic phase separation. The rheological behavior suggests that the copolymers associate into flower-like micelles, with only a small share of polymers that bridge the micelles and act as physical cross-linkers, even at high concentrations.

Comb-Like Polymer Thin Films Prepared by Ionization-Assisted Deposition of Acrylate Compounds

ABSTRACTAlkylacrylate compounds were deposited by the ionization-assisted deposition (IAD) method to form thin films of comb-like polymers having long alkyl side chains on the vinyl polymer backbone. From the source material of n-octadecyl acrylate, polymer thin films having average molecular weight of 6000 were obtained at the polymer yield of 45 to 65%. For the preparation of fluorinated polymer thin films, 1H, 1H, 11H-eicosafluoroundecyl acrylate was used as the source material. Although the conventional evaporation method could not accumulate any films with this material, the IAD was able to produce insoluble thin films that have large contact angle against water droplet. In either material, the polymerization reaction was enhanced with increasing electron emission current for IAD. These results indicate that the IAD enables the preparation of thin polymer coatings that have polyethylene or Teflon-like properties without using the solvents.

Combined oligomeric light and heat stabilizers

A series of terpolymers containing structural units of hindered amine stabilizer (HAS), antioxidant of diphenylamine type and octadecyl alkyl chain has been prepared by radical oligomerization initiated by AIBN. Monomers bearing HAS represented acrylate, methacrylate or acrylamide of 2,2,6,6-tetramethyl and 1,2,2,6,6-penta-methylpiperidine respectively. Second monomer in terpolymers was 4-amino-diphenylamine acrylamide or methacrylamide and the third one n-octadecyl acrylate. Molecular weights of oligomers lay in the region 4000–6500. The molar ratio of monomers in oligomers was approximately the same as in the mixtures of monomers before oligomerization (1:1:1). Oligomeric stabilizers were tested as photostabilizers in polyoctenamer and polypropylene (PP) and as thermostabilizers in PP at 130°C. Stabilizing efficiency for all oligomeric stabilizers was roughly the same in photooxidation of PP. In the case of thermooxidation, the oligomer TMPA/DPA/ODA showed several times better efficiency than other oligomers.