Click Chemistry; A Facile Route for Shape Memory Polymers

International Conference on Smart Materials & Structures

June 15 -17, 2015 Las Vegas, USA

Santhosh Kumar K S

Posters-Accepted Abstracts: J Material Sci Eng

Abstract :

Shape memory polymers (SMPs)are capable of holding a metastable shape (energy storage) and can deliver macro-scale shape (energy release) uponselective stimulus such as heat, current, magnetic field, pHand so on. Of various chemistries emerged, click chemistry, especially, copper catalyzed azide-lakynecycloaddition (CuAAC) reactions are being evolved recently to generate variety of SMPs. SMPs with trigger temperature above and below 100 °C (classified as high and low trigger temperature SMPs) can be synthesizedby this route in a very convenient way. The triazole links are very flexible which provide good shape recovery features for these SMPs. Dual trigger temperature SMPs are also synthesized by altering the composition of propargyl monomers in A3B2B3 class polymers. Dual stimulus SMPs are another branch of SMPs, they can be stimulated by heat as well as by solvents at body temperature. The strikingfeature is that, the same cross-linked polytriazole can be used for aerospace application as well as for biomedical applications. High recovery stress SMPs have a special distinction which can also be realized by preparing elastic memory composites based on polytriazoles.