Indexed by:期刊论文

Date of Publication:2018-02-01

Journal:EUROPEAN POLYMER JOURNAL

Included Journals:SCIE、EI

Volume:99

Page Number:477-484

ISSN No.:0014-3057

Key Words:Biobased; Thermoplastic elastomers; Star comb; Polylactide; Poly(beta-myrcene)

Abstract:Biobased thermoplastic elastomers from renewable resources are gaining increasing attention from academia and industry in recent years. Herein, highly branched star comb graft copolymers consisting of star poly(beta-myrcene) (SPM) backbone and semicrystalline poly(L-lactide) (PLLA) branches were successfully synthesized. The structure-properties relationships of the resultant graft polymers varied with graft density and branch length were investigated by DSC, WAXD, POM, SAXS, TEM, AFM and stress-strain test. The microphase separated structure and the relative properties of the copolymers were explored. It was found that the macromolecular architectures had a profound influence on the performances of these obtained graft materials. The crystallization ability of PLLA depended on the content of rubbery backbone and the graft density of these graft copolymers. Besides, the graft density and the branch length influence the tensile toughness of these materials. At the identical PM fraction, the elongations at break of the star comb graft copolymers were larger than those of the linear comb analogues.