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	1. Mechanism of Controlling Cross-linking Polymerization Progress
	Li Fangxing ,Sun Ruimin,Liu Dongping,Chen Jun
	Chemistry 17 January 2006
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	Abstract: A mechanism of controlling cross-linking polymerization process is reported in this paper. Chain propagation of cross-linking polymerization system designed in term of the mechanism is controlled, and soluble cross-linked macromolecules are successfully synthesized. The main content of the mechanism is that if there is a reaction that can compete with chain propagation of cross-linking process in a cross-linking polymerization and the reaction extent is enough high, the cross-linking polymerization is controllable. The meaning of controlled cross-linking process is that molecular chain grows limitably rather than illimitably. The characteristic random coil morphology of macromolecules in solution is the basis designing the controlled cross-linking polymerization, according to the morphology, a prepolymer containing two kinds of groups on its chain that can react with each other is synthesized firstly. In the polymerization, there are a pair of competitive reactions of intra- and intermolecular reactions that is a important factor controlling cross-linking process.
	TO cite this article:Li Fangxing ,Sun Ruimin,Liu Dongping, et al. Mechanism of Controlling Cross-linking Polymerization Progress[OL].[17 January 2006] http://en.paper.edu.cn/en_releasepaper/content/5018


	2. Effect of Concentration on Intra- and Intermolecular Reactions in Cross-linking polymerization Process
	Li Fangxing,Chen Jun ,Sun Ruimin ,Liu Dongping
	Chemistry 04 January 2006
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	Abstract:: Whether the ratio between intra- and inter-molecular reactions in controllable polymerization system changes when concentration alters is investigated in this paper, and it is strictly found that the ratio between intra- and inter-molecular reactions varies due to the alteration of concentration, which manifests that the intra- and inter-molecular reactions response quite differently to the same change of concentration since the two types of reaction belong to different reactive circumstance.
	TO cite this article:Li Fangxing,Chen Jun ,Sun Ruimin , et al. Effect of Concentration on Intra- and Intermolecular Reactions in Cross-linking polymerization Process[OL].[ 4 January 2006] http://en.paper.edu.cn/en_releasepaper/content/4845


	3. Influence of Material Ratio on Controlled Cross-linking Process
	Fangxing Li,Ruimin Sun,Jun Chen,Dongping Liu
	Chemistry 31 December 2005
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	Abstract:There exist intra- and intermolecular reactions in a controlled cross-linking system, and whether cross-linking process and molecular weight of product can be controlled depends on the two reactions. Soluble cross-linked macromolecule is synthesized by changing material ratio resulting in that the number of intermolecular reaction is controlled to a certain extent and molecular weight can’t increase illimitably. Though material ratio is a common chemical reaction condition, it has been proved that it can influence and control chain growth in cross-linking process in the paper.
	TO cite this article:Fangxing Li,Ruimin Sun,Jun Chen, et al. Influence of Material Ratio on Controlled Cross-linking Process[OL].[31 December 2005] http://en.paper.edu.cn/en_releasepaper/content/4819


	4. Effect of Catalyst on Intra- and Inter-molecular Reactions in Controlled Polymerization System
	Fangxing Li,Ruimin Sun jun,Chen,Dongping Liu
	Chemistry 31 December 2005
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	Abstract:Effect of catalyst on intra- and inter-molecular reaction rates in controlled polymerization system is investigated in this paper, and it has been found that inter-molecular reaction rate will increase more obviously when the catalyst is added, which indicates that catalyst is a vital factor in controlling cross-linking process.
	TO cite this article:Fangxing Li,Ruimin Sun jun,Chen, et al. Effect of Catalyst on Intra- and Inter-molecular Reactions in Controlled Polymerization System[OL].[31 December 2005] http://en.paper.edu.cn/en_releasepaper/content/4807

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