Quantitative aspects of chain extension of telechelics |
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Authors: | Béla Iván Joseph P. Kennedy |
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Affiliation: | (1) Institute of Polymer Science, University of Akron, 44325 Akron, Ohio, USA;(2) Present address: Central Research Institute for Chemistry of the Hungarian Academy of Science, POB 17, 1525 Budapest, Hungary |
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Abstract: | Summary Quantitative aspects of chain extension of telechelics have been studied. Molecular weight independent characteristic terms were defined and simple expressions were derived for number average extension, , and number average degree of extension, , as a function of number average functionality (¯Fn) of telechelic prepolymers. Analysis of these expressions indicate that n and ¯DEn are enormously sensitive to insignificant changes in ¯Fn close to ideal ¯Fn = 2.0. Molecular weight of the extended polymer (¯Mr) has also been calculated considering ¯Fn, number average molecular weight of the prepolymer (¯Mn), and molecular weight of the extender (Me). |
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