Unsaturated Polyamides Research Articles

Relationship between electron sensitivity and chemical structure of polymers as EB resists. I. Electron sensitivity of various polyamides

AbstractPolyamides containing double bonds or epoxy groups were synthesized and evaluated as electron beam (EB) resists, in order to find the relationship between electron beam sensitivity and chemical structure of the polyamides. It was found that polyamides containing double bonds, which have good solubility, are easily crosslinked by the electron beam exposure. The sensitivity of a polyamide with 70 mol% of the repeat units containing double bonds was equivalent to that of a 100% unsaturated polyamide which contained double bonds of 100% molar ratios, and thus it is not necessary that the polyamide be a homopolymer of unsaturated repeating units. The polyamides have good physical properties, and are adaptable to dry etching processes.

The synthesis and study of unsaturated polyamides

The hitherto unreported unsaturated polyamides, based on 6-dodecene-5-methyl-1,12-dicarboxylic and 6,10-hexadecadiene-5,10-dimethyl-1,16-dicarboxylic acids and hexamethylene diamine have been prepared and studied. The optimum conditions of synthesis in a melt were found and some of their properties described. Films were prepared by casting from solution and their physico-mechanical properties and dependence on subsequent thermal treatment determined.

Unsaturated Polyamides

Abstract Unsaturated polyamides were among the first polymers prepared by Carothers [1]. These early polymers were easily gelled by heat and seemingly had little practical value. However, the concept of having a polyamide with latent cross-linking capability and the development of low-temperature polycondensation by interfacial techniques encouraged more recent investigators to explore further the preparation and properties of large numbers of unsaturated polyamides. Some of these polymers seem to have practical merit for such diverse uses as membranes for reverse osmosis and as unsaturated polyamide resins, the latter to serve in place of unsaturated polyester resins.

The heterocyclization of some reactive polymers by a 3 + 2 dipolar cyclo-addition reaction—II. Polyamides and polyhydrazides

Based on quantitative transformation of unsaturated polyesters into Δ 2-pyrazoline polymers when reacted with 1,3-dipoles, attempts were made to apply the same reaction to unsaturated polyamides and polyhydrazides having double bonds conjugated with a carbonyl group. One could not obtain heterocyclic polymers because of factors discussed in the paper. The presence of an active hydrogen atom in the molecule of polyamide or polyhydrazide causes a decrease of the dipolarophile capacity of the double bond. Substitution of these hydrogen atoms, both in model compounds and polymers, leads to the expected results. Thus N-alkylpolyamide was quantitatively transformed into the Δ 2-pyrazoline polyamide.

Investigation of chemical transformations of unsaturated polyamides at high temperatures

Investigation of chemical transformations of unsaturated polyamides at high temperatures

Polyamides from unsaturated acids. II. Polyfumaramides from piperazines

AbstractHigh molecular weight unsaturated polyamides were obtained from fumaric acid dichloride and several piperazines both by interfacial and solution polycondensation. All polymers are partially crystalline and are infusible; on heating under vacuum their degradation temperatures are ranged within 350–370°C, while in air they degrade at rather lower temperatures (265–275°C). The polypiperazinefumaramides are soluble in strong acids and also in organic solvents such as formic acid, CHCI3/CH3OH and CH2Cl2/CH3OH mixtures: from these solutions tough and transparent films can be easily cast.

Copolymerization of unsaturated polyamides with styrene

Copolymerization of unsaturated polyamides with styrene

Copolymerization of unsaturated polyamides with vinyl monomers—I

Copolymerization of unsaturated polyamides with vinyl monomers—I

Synthesis and investigation of unsaturated fibre-forming polymers—I. Synthesis of unsaturated polyamides

Synthesis and investigation of unsaturated fibre-forming polymers—I. Synthesis of unsaturated polyamides

Some properties of unsaturated polyamides

Some properties of unsaturated polyamides

Some properties of unsaturated polyamides : O. Ya. Fedotova, I. P. Losev, N. M. Kozireva, G. V. Barabanova and N. A. Curochkina, Vysokomol. soyed. 5: No. 6, 900–904, 1963

Some properties of unsaturated polyamides : O. Ya. Fedotova, I. P. Losev, N. M. Kozireva, G. V. Barabanova and N. A. Curochkina, Vysokomol. soyed. 5: No. 6, 900–904, 1963