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Citation: VOONG SING-TUH, CHANG HUNG-TSE, CHAO VE-HSIAO. STUDIES ON CYCLOPOLYMERIZATION--TEMPERATURE EFFECT ON THE POLYMERIZATION MECHANISM OF METHACRYLIC ANHYDRIDE[J]. Acta Polymerica Sinica, ;1965, 7(2): 120-126. shu

STUDIES ON CYCLOPOLYMERIZATION--TEMPERATURE EFFECT ON THE POLYMERIZATION MECHANISM OF METHACRYLIC ANHYDRIDE

Received Date: 2 November 1964

In our previous report,by considering both monomolecular and bimolecular me-chanism of cyclopolymerization，the following kinetic relation was obtained：一d[M]-d[m]一A+B-[M] where [M] is the monomer concentration，[m] is the pendent double bond concentration and both A and B are constants．This equation was verified further in this report by polymerizing methacrylic anhydride under different temperatures．In all cases，一d[M]-d[m] gave a linear relation with 1／[M] as expected，and the intercepts of the plots obtained were 2．9，2.15 and 1.7 at temperatures of 60°，40°and 25℃ respectively．It was also found that the values of the ratio of the bimolecular rate to the monomolecular rate were 2.7 [M]，2.0 [M] & 1.4 [M] at 60°，40°and 25℃ respectively and thus decrease as temperature decreases．The energy of activation of bimolecular cyclopolymerization was found tO be 3.7 kcal／mole higher than that of monomolecular reaction．
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