| KINETIC ANALYSIS OF CO-CONDENSATION POLYMERIZATION OF AB2 AND AB MONOMERS |
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| 作者姓名： | Min-qiangYu Zhi-pingZhou De-yueYan |
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| 作者单位： | CollegeofChemistryandChemicalEngineering,ShanghaiJiaoTongUniversity,Shanghai200240,China |
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| 摘 要： | This work deals with the kinetics of co-condensation polymerization of AB2 and AB monomers, giving expressions of the two-dimensional molecular weight distribution function and the number/weight average molecular weights of the resulting copolymers. The two-dimensional molecular weight distribution depends on two indices, n and l, which are the respective numbers of AB2 and AB units in a copolymer species. The evolution of the two-dimensional weight and z distributions during the co-condensation polymerization has been evaluated systematically. Finally, the two-dimensional distribution was transformed into a one-dimensional molecular weight distribution with only one variable (the molecular weight of the products instead of the degree of polymerization). The calculated results show that the highly branched copolymer has a very broad molecular weight distribution when the co-condensation polymerization approaches completion.
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| 关 键 词： | 共聚物 动力学分析 分子量分布 浓缩 AB2树脂 AB树脂 |
| 收稿时间： | 2002-12-02 |
| 修稿时间： | 2003-02-11 |
KINETIC ANALYSIS OF CO-CONDENSATION POLYMERIZATION OF AB2 AND AB MONOMERS* |
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| Min-qiangYu Zhi-pingZhou De-yueYan.KINETIC ANALYSIS OF CO-CONDENSATION POLYMERIZATION OF AB2 AND AB MONOMERS[J].Chinese Journal of Polymer Science,2004,0(2):155-167. |
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| Authors: | Min-qiang Yu Zhi-ping Zhou De-yue Yan |
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| Institution: | College of Chemistry and Chemical Engineering, Shanghai Jiao Tong University,Shanghai 200240, China |
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| Abstract: | This work deals with the kinetics of co-condensation polymerization of AB2 and AB monomers, giving expressions of the two-dimensional molecular weight distribution function and the number/weight average molecular weights of the resulting copolymers. The two-dimensional molecular weight distribution depends on two indices, n and l, which are the respective numbers of AB2 and AB units in a copolymer species. The evolution of the two-dimensional weight and z distributions during the co-condensation polymerization has been evaluated systematically. Finally, the two-dimensional distribution was transformed into a one-dimensional molecular weight distribution with only one variable (the molecular weight of the products instead of the degree of polymerization). The calculated results show that the highly branched copolymer has a very broad molecular weight distribution when the co-condensation polymerization approaches completion. |
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| Keywords: | Hyperbranched copolymer Kinetic analysis Molecular weight distribution POLYMERIZATION ANALYSIS results show completion products instead of degree distributions variable evolution during numbers units copolymers species molecular weight distribution two indices average weights |
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