Synthesis and thermal degradation mechanism of polyorganocarboranesiloxanes containing m-carboranylmethyl unit

	Synthesis and thermal degradation mechanism of polyorganocarboranesiloxanes containing m-carboranylmethyl unit
	Lou, Pingping 1,2; Zhang, Xuezhong 1; Liu, Bozheng 1,2; Gao, Xiyin 1; Zhang, Zhijie 1; Xie, Zemin 1
刊名	POLYMER DEGRADATION AND STABILITY
	2017-10-01
卷号	144 页码:304-314
关键词	Carborane Thermal Properties Polyorganocarboranesiloxane Thermal Degradation Mechanism Xps Elastomer
英文摘要	This paper reports a high-yielding, efficient and facile method in preparing monomers, namely 1,7bis(hydroxyl(dimethyl)silylmethyl)-m-carborane (M1), 1,7-bis(diethylamino(dimethyl)silylmethyl)-mcarborane (M2), 1,3-dimethy1-1,3-diphenyl-siloxanediol (M3) and diethylaminomethylphenylsilane (M4). The reaction of M2 and M3 to get polymer P1, and the reaction of M1 and M4 to get polymer P2 which has a promising lead in searching for materials with high-temperature properties. The structure of monomers and linear polymers were characterized by NMR and FTIR. Thermal properties of the poly-organocarboranesiloxane elastomers were characterized by DSC and TGA.. The results showed that elastomers E1 and E2 have better thermal stability and thermal oxidative stability with 5% weight loss temperatures above 570 degrees C, 650 degrees C in nitrogen and 536 degrees C, 730 degrees C in air, respectively than that of linear polymers P1 and P2. The highlight was to study the thermal degradation mechanism of poly-organocarboranesiloxane elastomers using XPS and Solid-state Si-29 NMR. Carborane and organosiloxane outside of samples were gradually oxidized to B2O3 and SiO2 respectively, the inside only occurred the cleavage of the Si-Ph bond caused by terminal hydroxyl groups which resulted in chain branching and illustrated there was no access for oxygen easy to internal oxidation. (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/121111/39167]
专题	化学研究所_高技术材料实验室
作者单位	1.Chinese Acad Sci, Inst Chem, Lab Adv Polymer Mat, Zhongguancun North First St 2, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci, Coll Chem & Chem Engn, 19A Yuquan Rd, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Lou, Pingping,Zhang, Xuezhong,Liu, Bozheng,et al. Synthesis and thermal degradation mechanism of polyorganocarboranesiloxanes containing m-carboranylmethyl unit[J]. POLYMER DEGRADATION AND STABILITY,2017,144:304-314.
APA	Lou, Pingping,Zhang, Xuezhong,Liu, Bozheng,Gao, Xiyin,Zhang, Zhijie,&Xie, Zemin.(2017).Synthesis and thermal degradation mechanism of polyorganocarboranesiloxanes containing m-carboranylmethyl unit.POLYMER DEGRADATION AND STABILITY,144,304-314.
MLA	Lou, Pingping,et al."Synthesis and thermal degradation mechanism of polyorganocarboranesiloxanes containing m-carboranylmethyl unit".POLYMER DEGRADATION AND STABILITY 144(2017):304-314.