Sharp and strong "Brill transition" of poly(hexamethylene dithiocarbonate)

	Sharp and strong "Brill transition" of poly(hexamethylene dithiocarbonate)
	Zhao, Ti-Peng 1,3; Celli, Annamaria 2,4; Ren, Xiang-Kui 5; Xu, Jia-Ru 1; Yang, Shuang 1; Liu, Chen-Yang 2,3; Chen, Er-Qiang 1
刊名	POLYMER
	2017-03-24
卷号	113 页码:267-273
关键词	Brill Transition Crystal-crystal Transition Conformational Transformation
英文摘要	In this paper, the reversible crystal-crystal transition of poly(hexamethylene dithiocarbonate) (PHMDC) has been systematically studied. According to various experimental results, we confirm that the transition shares the common features with Brill transition that is widely observed in nylons. This transition is clearly associated with the reversible trans-gauche conformational transformation of the methylene sequences in the crystal lattice. Therefore, in addition to its analogue poly(octamethylene carbonate) POMC (ACS Macro Lett. 2015, 4, 317-321), PHMDC can be considered as a new example of the polymers exhibiting Brill transition outside the nylon family. Careful examination of the experimental data reveals that for PHMDC the enthalpy ratio of the Brill transition to the melting is a constant of similar to 2/3, independent of the crystallization condition applied. Furthermore, the difference between the Brill transition temperatures determined from heating and cooling is also a constant, which is of similar to 4 degrees C. These new observations are obtained because the Brill transition of PHMDC is sharp and possesses a large transition enthalpy. Such a transition is associated with that the methylene segments in PHMDC can change their conformation between trans and gauche rapidly and completely in a narrow temperature interval. (C) 2017 Published by Elsevier Ltd.
语种	英语
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/38261]
专题	化学研究所_工程塑料实验室
作者单位	1.Peking Univ, Beijing Natl Lab Mol Sci, Key Lab Polymer Chem & Phys,Coll Chem & Mol Engn, Minist Educ,Ctr Soft Matter Sci & Engn, Beijing 100871, Peoples R China 2.Chinese Acad Sci, Inst Chem, CAS Key Lab Engn Plast, Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Univ Bologna, Dept Civil Chem Environm & Mat Engn, Via Terracini 28, I-40131 Bologna, Italy 5.Tianjin Univ, Sch Chem Engn & Technol, Tianjin 300072, Peoples R China
推荐引用方式 GB/T 7714	Zhao, Ti-Peng,Celli, Annamaria,Ren, Xiang-Kui,et al. Sharp and strong "Brill transition" of poly(hexamethylene dithiocarbonate)[J]. POLYMER,2017,113:267-273.
APA	Zhao, Ti-Peng.,Celli, Annamaria.,Ren, Xiang-Kui.,Xu, Jia-Ru.,Yang, Shuang.,...&Chen, Er-Qiang.(2017).Sharp and strong "Brill transition" of poly(hexamethylene dithiocarbonate).POLYMER,113,267-273.
MLA	Zhao, Ti-Peng,et al."Sharp and strong "Brill transition" of poly(hexamethylene dithiocarbonate)".POLYMER 113(2017):267-273.