Shape-Memory Behavior of Polylactide/Silica Ionic Hybrids

• DOI: 10.1021/acs.macromol.7b00195
• Publication Date: 2017-03-27T21:39:09Z
• Authors: Jérémy Odent; Jean-Marie Raquez; Cédric Samuel; Sophie Barrau; Apostolos Enotiadis; Philippe Dubois; Emmanuel P. Giann...
• Keywords: Hybrid material; Slippage

Commercial polylactide (PLA) was converted and endowed with shape-memory properties by synthesizing ionic hybrids based on blends of PLA imidazolium-terminated poly[ε-caprolactone-co-d,l-lactide] (P[CL-co-LA]) surface-modified silica nanoparticles. The electrostatic interactions assist the nanoparticle dispersion in polymer matrix. Since polymers is a perennial challenge has prevented nanocomposites from reaching their full potential terms performance we expect this new design will be exploited other systems to synthesize well-dispersed nanocomposites. Rheological measurements are consistent formation network. also much more deformable compared neat PLA. More importantly, they exhibit behavior fixity ratio Rf ≈ 100% recovery Rr = 79%, for blend containing 25 wt % im-PLA im-P[CL-co-LA] 5 SiO2–SO3Na. Dielectric spectroscopy dynamic mechanical analysis show second, low-frequency relaxation attributed strongly immobilized chains due interactions. Creep compliance tests further suggest that prevent permanent slippage which most likely responsible significant observed.