Improvement of environmental stress cracking resistance of polycarbonate by silicone coating

被引：17
|
作者：
Yan, Chenguang [1 ,2 ]
Zhang, Junli [1 ,2 ]
Han, Jian [2 ]
Wang, Xinchao [3 ]
Guan, Zhanshi [1 ,2 ]
Zhang, Lixiang [1 ,2 ]
Liu, Chuntai [2 ]
Shen, Changyu [2 ]
机构：
[1] Zhengzhou Univ, Sch Mat Sci & Engn, 100 Kexue Rd, Zhengzhou 450001, Peoples R China
[2] Zhengzhou Univ, Natl Engn Res Ctr Adv Polymer Proc Technol, 97 Wenhua Rd, Zhengzhou 450002, Peoples R China
[3] Henan Univ Technol, Coll Mechatron Engn, 100 Lianhua St, Zhengzhou 450001, Peoples R China
来源：
POLYMER TESTING | 2017年 / 60卷
基金：
中国国家自然科学基金;
关键词：
Environmental stress cracking; Silicone coating; Stress relaxation; Polycarbonate; BEHAVIOR;
D O I：
10.1016/j.polymertesting.2016.11.007
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
To explore the possibility of using surface coating to reduce environmental stress cracking (ESC) of transparent polycarbonate (PC) parts, silicone coated and SiO2 coated PC were tested in a self-made three-point bending apparatus in the presence of ethanol. The variation of stress with time was recorded, and the surface cracking was observed to evaluate the ESC resistance of samples. Slower stress relaxation rates and fewer surface cracks indicated that silicone coating improved the ESC resistance of PC, but SiO2 coated PC was found to be no better than that of uncoated PC. Silicone coating reduced the absorption of ethanol in PC, weakening the surface plasticization, thus hindering the formation and development of cracks in PC. Nanoindentation test results showed that the mechanical properties such as hardness and elastic modulus of silicone coating are a better match for PC than SiO2 coating. This allows the silicone coating to have a favorable effect in providing continuous protection for PC under the combined action of ethanol and stress. (C) 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码：6 / 11
页数：6
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