Rate-dependent phase transition of high density polyethylene

被引：6

作者：

Zhong, T. ^{[1
]}

Zhong, Z. Y. ^{[1
]}

Huang, J. W. ^{[2
]}

Sun, T. ^{[3
]}

Fezzaa, K. ^{[3
]}

Huang, J. Y. ^{[1
,2
]}

Luo, S. N. ^{[1
,2
]}

机构：

[1] Peac Inst Multiscale Sci, Chengdu 610207, Sichuan, Peoples R China

[2] Southwest Jiaotong Univ, Minist Educ, Key Lab Adv Technol Mat, Chengdu 610031, Sichuan, Peoples R China

[3] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA

来源：

MATERIALIA | 2019年 / 6卷

基金：

国家重点研发计划; 中国国家自然科学基金;

关键词：

Semicrystalline polymer; Dynamic tension; X-ray diffraction; Phase transition; DEFORMATION; MECHANISMS; BEHAVIOR;

D O I：

10.1016/j.mtla.2019.100274

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Quasi-static and dynamic tension tests are conducted on a widely used semicrystalline polymer, high density polyethylene (HDPE), to explore the strain rate effects on phase transition. HDPE exhibits considerable strain-rate hardening. In situ, high-speed x-ray diffraction demonstrates a martensitic transformation from the orthorhombic to monoclinic phase during both loading conditions. However, compared to quasi-static loading, the phase transition occurs at a lower bulk strain but higher stress under dynamic loading (strain rate 5100 s(-1)), suggesting strain-rate-accelerated phase transition dynamics. Evolutions of lattice strain with bulk stress indicate different roles of amorphous and crystalline phases in deformation under different strain rates.

引用

页数：4

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