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Effect of the copolycondensation temperature on the reactivities of bis(3‐hydroxypropyl)terephthalate and bis(2‐hydroxyethyl)terephthalate
Author(s) -
Sik Yoon Won,
Seok Lyoo Won,
Do Ghim Han,
Lee Jinwon,
Ho Kim Joon,
Soo Kim Sam
Publication year - 2003
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.12384
Subject(s) - condensation polymer , polymer chemistry , monomer , reactivity (psychology) , dimethyl terephthalate , polymerization , catalysis , materials science , copolymer , kinetics , chemistry , organic chemistry , polymer , medicine , alternative medicine , physics , pathology , quantum mechanics
The rate constants of cross reactions in the copolycondensation of bis(3‐hydroxypropyl)terephthalate (BHPT) and bis(2‐hydroxyethyl)terephthalate (BHET), k 12 and k 21 , were determined with the results obtained from 1 H NMR spectroscopy analysis. BHPT and BHET were polymerized and copolymerized at 260, 270, and 280°C with titanium tetrabutoxide as a catalyst. With the adoption of second‐order kinetics to the polycondensation, k 11 and k 22 were calculated. The monomer reactivity ratios of BHPT were much larger than those of BHET, indicating the block nature of the copolycondensation, but the difference between the reactivity ratios was lowest at the highest polycondensation temperature of 280°C. This indicated that the probability of randomization was increased. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 89: 1890–1895, 2003