Crystallization and relaxation behavior of partially disentangled poly(vinyl chloride) prepared from large molecule solvent dioctyl phthalate

doi:10.1021/ma020407j

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	Crystallization and relaxation behavior of partially disentangled poly(vinyl chloride) prepared from large molecule solvent dioctyl phthalate
	Sun, Q; Zhou, DS; Wang, XL; Xue, G
刊名	MACROMOLECULES
	2002-08-27
卷号	35 期号:18 页码:7089-7092
ISSN号	0024-9297
DOI	10.1021/ma020407j
英文摘要	Poly(vinyl chloride) (PVC) samples for the conformation and structural relaxation studies were prepared by freeze-extracting the solutions in various solvents and with varying concentrations. The partially disentangled PVC samples could be obtained by freeze-extracting very dilute PVC/tetrahydrofuran (THF) and PVC/dimethyl phthalate (DMP) solution (0.05 wt %), while the PVC sample remains in an entangled state after freeze-extracting the concentrated solutions in THF and in DMP. Surprisingly, the extent of interpenetration of PVC chain decreases, even in concentrated solution in dioctyl plithalate (DOP) (5 wt %), which is contrary to accepted theories. DSC and infrared spectroscopic studies showed that a higher ordered conformation could be achieved for the disentangled specimens recovered from concentrated solution in DOP than for the entangled samples prepared from THF and DMP. DSC heating curves showed strong and sharp endothermal peaks for the disentangled polymer after sub-T-g annealing. The structural relaxation behavior of the disentangled PVC freeze-extracted from DOP solutions is more predominant, which is in good agreement with the modeling predictions.
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000177688800049
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/78833]
专题	中国科学院化学研究所
通讯作者	Xue, G
作者单位	Nanjing Univ, Dept Polymer Sci & Engn, State Key Lab Polymer Phys & Chem, Nanjing 210093, Peoples R China
推荐引用方式 GB/T 7714	Sun, Q,Zhou, DS,Wang, XL,et al. Crystallization and relaxation behavior of partially disentangled poly(vinyl chloride) prepared from large molecule solvent dioctyl phthalate[J]. MACROMOLECULES,2002,35(18):7089-7092.
APA	Sun, Q,Zhou, DS,Wang, XL,&Xue, G.(2002).Crystallization and relaxation behavior of partially disentangled poly(vinyl chloride) prepared from large molecule solvent dioctyl phthalate.MACROMOLECULES,35(18),7089-7092.
MLA	Sun, Q,et al."Crystallization and relaxation behavior of partially disentangled poly(vinyl chloride) prepared from large molecule solvent dioctyl phthalate".MACROMOLECULES 35.18(2002):7089-7092.