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DEGREE OF BRANCHING OF THE HYPERBRANCHED POLYMERS RESULTED FROM AB_2 POLYCONDENSATION WITH SUBSTITUTION EFFECT |
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| Authors: | Zhi-ping Zhou De-yue Yanb a School of Materials Science Engineering Jiangsu University Zhenjiang China b School of Chemistry Chemical Engineering Shanghai Jiao Tong University Shanghai China |
| Affiliation: | Zhi-ping Zhou~(a**) and De-yue Yan~b a School of Materials Science and Engineering,Jiangsu University,Zhenjiang 212013,China b School of Chemistry and Chemical Engineering,Shanghai Jiao Tong University,Shanghai 200240,China |
| Abstract: | The analytical expressions of the various structural units and the average degree of branching for the hyperbranched polymers resulted from AB_2 polycondensation with substitution effect were derived by the kinetic mechanism.The reactivity difference between the B group in linear unit and that in terminal group has great effect on the molecular parameters of the products obtained.The concentration of terminal units has a maximum with the increase of the conversion of A groups(x).The higher the reactivity ra... |
| Keywords: | Degree of branching Polycondensation Hyperbranched polymers Substitution effect |
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