Premium
Kinetics of polycondensation and copolycondensation of Bis(3‐hydroxypropyl terephthalate) and Bis(2‐hydroxyethyl terephthalate)
Author(s) -
Kim Joon Ho,
Lee Sang Yong,
Park Jun Ho,
Lyoo Won Seok,
Noh Seok Kyun
Publication year - 2000
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/(sici)1097-4628(20000718)77:3<693::aid-app24>3.0.co;2-q
Subject(s) - condensation polymer , polymer chemistry , dimethyl terephthalate , kinetics , monomer , catalysis , reaction rate constant , materials science , polyester , polyethylene terephthalate , chemistry , organic chemistry , polymer , composite material , physics , quantum mechanics
The kinetics of polycondensation and copolycondensation reactions of bis(3‐hydroxypropyl) terephthalate (BHPT) and bis(2‐hydroxyethyl) terephthalate (BHET) as monomers were investigated at 270°C, in the presence of titanium tetrabutoxide (TBT) as a catalyst. BHPT was prepared by ester interchange reaction of dimethyl terephthalate (DMT) and 1,3‐propanediol (PD). Applying second‐order kinetics for polycondensation, the rate constants of polycondensation of BHPT and BHET, k 11 and k 22 , were calculated as 3.975 and 2.055 min −1 , respectively. The rate constants of cross‐reactions in the copolycondensation of BHPT and BHET, k 12 and k 21 , were obtained by using the results obtained from a proton nuclear magnetic resonance spectroscopy. The rate constants during the copolycondensation of BHPT and BHET at 270°C decreased in the order k 11 > k 12 > k 22 > k 21 , indicating the block nature of the copolycondensation. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 77: 693–698, 2000