Abstract
When dealing with smart polymers, in particular with shape memory polymers, the polymer type and composition specify the overall material properties and in particular the extent of the shape memory effect. Polybenzoxazines as a polymer with high potential for structural applications represent a promising component for materials with both shape memory effect and structurally interesting material properties. This minireview gives insight into how the shape memory effect, in particular the shape recovery event, is influenced by internal factors such as polymer structure, morphology and external factors such as filler addition.
Highlights
Shape memory polymers (SMPs) are stimuli-responsive materials that can regain their original permanent shape after being deformed to a temporary shape in response to an external stimulus
SMPs can be comprised of thermoplastics with physically induced crosslinks (TP-SMP) and thermosetting polymers with covalent crosslinks (TS-SMP) as long as the molecular network structure contains at least two separate phases
Their Ttrans are categorized into two types by their network structure that is, melting temperature (Tm) for thermoplasticshape memory polymers (TP-SMPs) or glass transition temperature (Tg) for thermoset-shape memory polymers (TS-SMPs).[14]
Summary
Shape memory polymers (SMPs) are stimuli-responsive materials that can regain their original permanent shape after being deformed to a temporary shape in response to an external stimulus. Likitaporn et al successfully prepared silicon carbide whisker (SiCw) filled BA-a/ NGDE SMPs with excellent recovery stress improvement.[45] They reported a significant increase in recovery stress, storage modulus, glass transition temperature, and thermal stabilities of the rendered SMPCs upon addition of SiCw. With respect to shape memory properties, the obtained SMPCs provided an outstanding shape fixity value up to 99 %. Their results demonstrated that light-triggered SMPCs could be developed from renewable resources and could be used for advanced smart multifunctional material applications. The detailed discussion of these results will be available soon
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