Thermal and shape memory properties of cyanate/polybutadiene epoxy/polysebacic polyanhydride copolymer

Abstract

A novel thermal‐induced shape memory polymer was synthesized by copolymerization of a new kind of epoxy resin‐polybutadiene epoxy (PBEP), bisphenol A‐type cyanate ester (BACE), and polysebacic polyanhydride (PSPA) with different mass ratios. Fourier transform infrared spectroscopy (FTIR), bending test, dynamic mechanical analysis (DMA), and shape memory property were investigated systematically. It was found that the PSPA significantly enhanced the bending strength and flexural modulus. The DMA results showed that the glass transition temperature reduced with increasing content of PSPA. Furthermore, the shape memory tests proved that the copolymer possessed excellent shape memory properties. The shape recovery time decreased with increasing content of PSPA and temperature. The shape memory rate increased as the PSPA content increased. The shape recovery ratio decreased with increasing cycle times. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 42045.

Thermoset shape memory polymers and their composites

“…Epoxy, due to its good compatibility and reactivity with cyanate esters, has been used as an important modifier and flexibilizer for reactions with cyanate esters in the SMP field (Wang et al, 2015a). Biju et al (2012a) generated a series of thermoset SMPs based on three epoxy-cyanate matrices in which the molar ratios of diglycidyl ether of bisphenol A and bisphenol A dicyanate were 1:0.82, 1:0.89, and 1:0.92, respectively.…”

Shape Memory Epoxy Resin and Its Composites: From Materials to Applications

“…The addition of PBEP enabled the fastest recovery rate to 0.0128 s −1 and filled with carbon black (CB) for the synthesis of electroactive shape memory polymer composites (SMPCs) [ 40 ]. Subsequently, a new crosslink network was formed based on BACE/PBEP with polysebacic acid anhydride (PSPA) [ 41 ], and the shape recovery time decreased with the increase of PSPA content, as shown in Figure 4(c) .…”

Cyanate Ester—Epoxy Blends for Structural and Functional Composites

“…It was reported that if the glass storage modulus of any polymer is more than two times the rubbery storage modulus, then that polymer possesses excellent shape memory characteristics . On the basis of this theoretical consideration, Wang et al , and Ariraman et al developed CE–EP based SMP without adding a crystallizable segment. Wang et al blended the CE and polybutadiene EP (PBEP) by considering that a flexible aliphatic chain containing PBEP would serve as a reversible phase and cross-linked structure of cured CE would serve as a stationary phase.…”

“…Further Wang et al 177 modified the CE-PBEP system by introducing polysebacic polyanhydride (PSPA) into it, to reduce shape recovery time without changing the percentage of shape recovery. Here the flexible aliphatic chain of PBEP and PSPA served as a reversible phase and triazine served as a stationary phase.…”