Direct Relationship Between Interfacial Microstructure and Confined Crystallization in Poly(Ethylene Oxide)/Silica Composites: The Study of Polymer Molecular Weight Effects

	Direct Relationship Between Interfacial Microstructure and Confined Crystallization in Poly(Ethylene Oxide)/Silica Composites: The Study of Polymer Molecular Weight Effects
	Zhao, Weiwei 1,2; Su, Yunlan 1; Mueller, Alejandro J.3,4,5; Gao, Xia 1; Wang, Dujin 1
刊名	JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS
	2017-11-01
卷号	55 期号:21 页码:1608-1616
关键词	Confined Crystallization Interphase Nanocomposites Polymer Molecular Weight
英文摘要	With particular focus on the characterization of polymer-nanoparticle interaction, the effects of polymer molecular weight (M-n) on confined crystallization of the interfacial region in poly(ethylene oxide) (PEO)/silica (SiO2) composites were investigated, employing differential scanning calorimetry, dynamic light scattering, and proton nuclear magnetic resonance relaxation techniques. Dependence of crystallization on M-n in PEO/SiO2 composites is found to be closely related to the microstructure changes in adsorbed polymer. PEO adsorbs in a manner that produces a tightly bound layer (amorphous) with constant thickness, independent of M-n, and creates a loosely bound layer with flattened structure for short PEO chains but coiled conformation for long chains. The contribution of this M-n-dependent layer to crystallization grows with M-n, showing a transition from non-crystalline phase to the formation of a crystallization peak (-25 to -33 degrees C), and then to crystallization together with non-adsorbed PEO. The comprehensive description of the interfacial region should be a helpful tool in the preparation and modification of polymer nanocomposites. (C) 2017 Wiley Periodicals, Inc.
语种	英语
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/41239]
专题	化学研究所_工程塑料实验室
作者单位	1.Chinese Acad Sci, Beijing Natl Lab Mol Sci, Inst Chem, Key Lab Engn Plast, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Univ Basque Country, UPV EHU, POLYMAT, Fac Chem, Paseo Manuel de Lardizabal 3, Donostia San Sebastian 20018, Spain 4.Univ Basque Country, UPV EHU, Polymer Sci & Technol Dept, Fac Chem, Paseo Manuel de Lardizabal 3, Donostia San Sebastian 20018, Spain 5.Ikerbasque, Basque Fdn Sci, Bilbao, Spain
推荐引用方式 GB/T 7714	Zhao, Weiwei,Su, Yunlan,Mueller, Alejandro J.,et al. Direct Relationship Between Interfacial Microstructure and Confined Crystallization in Poly(Ethylene Oxide)/Silica Composites: The Study of Polymer Molecular Weight Effects[J]. JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS,2017,55(21):1608-1616.
APA	Zhao, Weiwei,Su, Yunlan,Mueller, Alejandro J.,Gao, Xia,&Wang, Dujin.(2017).Direct Relationship Between Interfacial Microstructure and Confined Crystallization in Poly(Ethylene Oxide)/Silica Composites: The Study of Polymer Molecular Weight Effects.JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS,55(21),1608-1616.
MLA	Zhao, Weiwei,et al."Direct Relationship Between Interfacial Microstructure and Confined Crystallization in Poly(Ethylene Oxide)/Silica Composites: The Study of Polymer Molecular Weight Effects".JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS 55.21(2017):1608-1616.