Transient microstructure in long alkane segment polyamide: Deformation mechanism and its temperature dependence

	Transient microstructure in long alkane segment polyamide: Deformation mechanism and its temperature dependence
	Wang, Lili; Dong, Xia; Huang, Miaoming; Wang, Dujin
刊名	POLYMER
	2016-08-05
卷号	97 页码:217-225
关键词	Long chain polyamide Transient microstructure Temperature dependence
英文摘要	Deformation-induced microstructure evolution of Polyamide 1012, with an emphasis on lamella development, polymorphism transition and molecular orientation, is investigated. When deformed above Tg (100 degrees C), a series of complex SAXS patterns are continuously identified at intermediate strain including four-point pattern, figure-8 pattern and X-shaped pattern, accompanied with two-bar pattern on the meridian, which corresponds to the transient microstructure. Such particular structure is resulted from the approach of tilted lamellae along the drawing direction, the insertion and the orientation of new lamellae. To investigate the temperature dependence, the microstructure developments at 30 degrees C (below Tg), 60 degrees C (close to Tg) and 100 degrees C (above Tg) are compared. Considering 38% enhancement of the fracture stress with elevated temperature (from 60 degrees C to 100 degrees C), the temperature dependence of particular SAXS patterns further suggests that the elongation above Tg favors higher level of stretching-induced crystallization and better aligned microfibrillar structure, which competes with thermal-induced increased chain mobility. Based on the comprehensive results, the correlation between microstructure and mechanical response has been successfully established, which is featured by the synchronous occurrence of transient structure with slight strain hardening. (C) 2016 Elsevier Ltd. All rights reserved.
收录类别	SCI
语种	英语
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/35608]
专题	化学研究所_工程塑料实验室
作者单位	Chinese Acad Sci, Inst Chem, CAS Key Lab Engn Plast, Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Wang, Lili,Dong, Xia,Huang, Miaoming,et al. Transient microstructure in long alkane segment polyamide: Deformation mechanism and its temperature dependence[J]. POLYMER,2016,97:217-225.
APA	Wang, Lili,Dong, Xia,Huang, Miaoming,&Wang, Dujin.(2016).Transient microstructure in long alkane segment polyamide: Deformation mechanism and its temperature dependence.POLYMER,97,217-225.
MLA	Wang, Lili,et al."Transient microstructure in long alkane segment polyamide: Deformation mechanism and its temperature dependence".POLYMER 97(2016):217-225.