Partially bio-based thermoplastic elastomers by physical blending of poly(hydroxyalkanoate)s and poly(ethylene-co-vinyl acetate) | Zendy

Piming Ma | Zendy; Xiaoxia Cai | Zendy; M. Chen | Zendy; Weifu Dong | Zendy; P. J. Lemstra | Zendy

Open Access

Partially bio-based thermoplastic elastomers by physical blending of poly(hydroxyalkanoate)s and poly(ethylene-co-vinyl acetate)

Author(s) -

Piming Ma,

Xiaoxia Cai,

M. Chen,

Weifu Dong,

P. J. Lemstra

Publication year - 2014

Publication title -

express polymer letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.695

H-Index - 72

ISSN - 1788-618X

DOI - 10.3144/expresspolymlett.2014.55

Subject(s) - materials science , thermoplastic elastomer , elastomer , vinyl acetate , thermoplastic , ultimate tensile strength , spherulite (polymer physics) , elongation , ethylene vinyl acetate , composite material , ethylene , polymer blend , polymer chemistry , polymer , copolymer , organic chemistry , catalysis , chemistry

Partially bio-based thermoplastic elastomers (bio-TPE) were designed and prepared by physical blending a commercial grade poly(hydroxyalkanoate)s (PHBM, Metabolix) and poly(ethylene-co-vinyl acetate) (EVA). The PHBM is miscible with EVA90 which has a vinyl acetate (VA) content of 90 wt% while it is not miscible with EVA at low VA content (!70 wt%). The PHBM/EVA90 blends exhibit high tensile strength and typical thermoplastic elastomeric characteristics e.g. high elongation at break (>800%), good strain-recovery (>60%) and melt processability. The spherulite growth rate of PHBM decreases with increasing EVA90 content. Consequently, a large number of fine PHBM spherulites were formed in the blends. The spherulites act as physical crosslink-points leading to a thermoreversable network in the blends. Such network and elastic EVA90 molecules result in the thermoplastic and elastomeric characteristics of the PHBM/EVA90 blends

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