PMMA在玻璃化温度以上单轴压缩力学性能研究

doi:10.19491/j.issn.1001-9278.2013.11.012

中国塑料 ›› 2013, Vol. 27 ›› Issue (11): 66-70.DOI: 10.19491/j.issn.1001-9278.2013.11.012

PMMA在玻璃化温度以上单轴压缩力学性能研究

冯维娜张响¹,张勤星²,王市伟孙冰丽李倩¹,³

1. 郑州大学
2. 郑州大学橡塑模具国家工程研究中心
3. 郑州大学微纳成型技术国际联合研究中心

收稿日期:2013-06-09 修回日期:2013-08-21 出版日期:2013-11-26 发布日期:2013-11-26
基金资助:
国家重点基础研究发展计划（973计划）资助，项目编号2012CB626809

Mechanical Behavior of PMMA Above the Glass Transition Temperature Under Uniaxial Compression

Received:2013-06-09 Revised:2013-08-21 Online:2013-11-26 Published:2013-11-26
Contact: Qian LI E-mail:qianli@zzu.edu.cn

摘要/Abstract

摘要： 研究了无定形聚合物聚甲基丙烯酸甲脂（PMMA）在单轴压缩条件下，温度高于玻璃化转变温度，在110 ~130 ℃温度范围内，其力学性能随温度和应变率的变化规律。结果表明，PMMA具有对温度的敏感性，其屈服应力随着温度的升高而降低，表现为温度软化效应；当温度超过120 ℃屈服峰消失，表现出良好的塑性；PMMA也具有明显的应变率相关性，在0.001~0.1 s-1应变率范围内，随着应变率提高应变硬化加强。

Abstract: The uniaxial compression behavior of amorphous polymethylmethacrylate (PMMA) was studied between 110 ℃ and 130 ℃. It showed that PMMA was sensitive to the temperature, its yield stress decreased with increasing temperature. When the temperature was higher than 120 ℃,the yield peak disappears, showing good plasticity. PMMA was also sensitive to the strainrate. The strain hardening was gentle when the rate was ranging from 0.1 s-1 to 0.001 s-1. The microscopic mechanism above temperature and stressstrain dependent behavior was explained.

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冯维娜张响张勤星王市伟孙冰丽李倩. PMMA在玻璃化温度以上单轴压缩力学性能研究 [J]. 中国塑料, 2013, 27(11): 66-70.

PMMA在玻璃化温度以上单轴压缩力学性能研究

Mechanical Behavior of PMMA Above the Glass Transition Temperature Under Uniaxial Compression

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