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	Synthesis and characterization of hyperbranched polystyrene copolymers by atom transfer radical self-condensing vinyl copolymerization
	Zhang, Chuan-hai1; Li, Jin-ge2; Zhang, Jun1,2; Zhang, Liao-yun1; Li, Hua-yi2
刊名	Polymers for advanced technologies
	2010-10-01
卷号	21期号:10页码:710-719
关键词	Hyperbranched polystyrene copolymers Atom transfer radical polymerization Self-condensing vinyl copolymerization
ISSN号	1042-7147
DOI	10.1002/pat.1491
通讯作者	Zhang, liao-yun(zhangly@gucas.ac.cn)
英文摘要	A series of hyperbranched polystyrene copolymers were synthesized by atom transfer radical self-condensing vinyl copolymerization (atr-scvcp) of p-chloromethylstyrene (cms) and styrene using the complex cucl/2,2'-bipyridyl as catalyst. the composition and structures of these hyperbranched polystyrene copolymers were characterized by (1)h-nmr and (13)c-nmr spectroscopy, gel permeation chromatography (gpc), and elemental analysis. the thermal properties were studied by differential scanning calorimetry (dsc) and thermogravimetric analysis (tga). the influence of the reaction conditions, including comonomer ratios, reaction time, and polymerization temperature, on the molecular weight and degree of branching (db) of the resulting copolymers were investigated in detail. with increasing ratios of styrene in total monomers from 10 to 90%, the resulting copolymers have number-average molecular weights that change from 6.0 to 10.5 kda, polydispersities from 2.96 to 4.74, and a degree of branching from 0.01 to 0.45. the experimental results indicated that the structures and properties can be controlled by adjusting the reaction conditions. the concentrations of styrene in the copolymers slightly affect the copolymer structures and t(g) when they are less than 50 mol%, but have a large effect at greater concentrations. the results also show that the atr-scvp reaction does not follow a complete atrp feature, but has some characteristics of step-growth polymerization. copyright (c) 2009 john wiley & sons, ltd.
WOS关键词	EQUAL RATE CONSTANTS ; MOLECULAR-PARAMETERS ; DENDRITIC MATERIALS ; AB(2) MONOMER ; POLYMERS ; POLYMERIZATION ; DENDRIMERS ; P-(CHLOROMETHYL)STYRENE ; CHLOROMETHYLSTYRENE ; (CO)POLYMERIZATION
WOS研究方向	Polymer Science
WOS类目	Polymer Science
语种	英语
出版者	WILEY-BLACKWELL
WOS记录号	WOS:000282400000005
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2406811
专题	中国科学院大学
通讯作者	Zhang, Liao-yun
作者单位	1.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Joint Lab Polymer Sci & Mat, Key Lab Engn Plast, Inst Chem, Beijing 100080, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Chuan-hai,Li, Jin-ge,Zhang, Jun,et al. Synthesis and characterization of hyperbranched polystyrene copolymers by atom transfer radical self-condensing vinyl copolymerization[J]. Polymers for advanced technologies,2010,21(10):710-719.
APA	Zhang, Chuan-hai,Li, Jin-ge,Zhang, Jun,Zhang, Liao-yun,&Li, Hua-yi.(2010).Synthesis and characterization of hyperbranched polystyrene copolymers by atom transfer radical self-condensing vinyl copolymerization.Polymers for advanced technologies,21(10),710-719.
MLA	Zhang, Chuan-hai,et al."Synthesis and characterization of hyperbranched polystyrene copolymers by atom transfer radical self-condensing vinyl copolymerization".Polymers for advanced technologies 21.10(2010):710-719.

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