New insights into the beta-form crystal toughening mechanism in pre-oriented PHBV films

TY - JOUR

T1 - New insights into the beta-form crystal toughening mechanism in pre-oriented PHBV films

AU - Yang, Jian

AU - Zhu, Haijin

AU - Zhao, Ying

AU - Jiang, Qianhong

AU - Chen, Haiming

AU - Liu, Guoming

AU - Chen, Peng

AU - Wang, Dujin

N1 - Publisher Copyright: © 2017 Elsevier Ltd

PY - 2017/6/1

Y1 - 2017/6/1

N2 - Tensile deformation behaviors of pre-oriented poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) films annealed at different temperatures with or without β-form structures were investigated using the in-situ small and wide-angle X-ray scattering techniques, as well as DSC and SEM. The sample with β-form structure showed better ductility. It is convinced that the system can be viewed as a highly stretched and entangled network embedded in highly oriented fibrils being composed of shish-kebabs. Compared with sample without β structure, a tentative deformation mechanism for the sample with β structure was proposed in this paper, which we believe would shed light on the relationship between β structure and mechanical property of PHBV film. The important role of β-form played in the stretching process of pre-oriented film was also proposed for the first time, in which we stress the role of β-form structure in stabilizing the ordered microstructures and thereby improving the mechanical properties of the material.

AB - Tensile deformation behaviors of pre-oriented poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) films annealed at different temperatures with or without β-form structures were investigated using the in-situ small and wide-angle X-ray scattering techniques, as well as DSC and SEM. The sample with β-form structure showed better ductility. It is convinced that the system can be viewed as a highly stretched and entangled network embedded in highly oriented fibrils being composed of shish-kebabs. Compared with sample without β structure, a tentative deformation mechanism for the sample with β structure was proposed in this paper, which we believe would shed light on the relationship between β structure and mechanical property of PHBV film. The important role of β-form played in the stretching process of pre-oriented film was also proposed for the first time, in which we stress the role of β-form structure in stabilizing the ordered microstructures and thereby improving the mechanical properties of the material.

KW - Ductility

KW - Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV)

KW - Tensile deformation

KW - β-form

UR - http://www.scopus.com/inward/record.url?scp=85016454032&partnerID=8YFLogxK

U2 - 10.1016/j.eurpolymj.2017.03.017

DO - 10.1016/j.eurpolymj.2017.03.017

M3 - 文章

AN - SCOPUS:85016454032

SN - 0014-3057

VL - 91

SP - 81

EP - 91

JO - European Polymer Journal

JF - European Polymer Journal

ER -