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Synthesis of copolyesters via interchange reactions with polypivalolactone
Author(s) -
Tijsma Edze Jan,
van Der Does Leen,
Bantjes Adriaan,
Vulić Ivan,
Buning Gerard Hidde Werumeus
Publication year - 1993
Publication title -
makromolekulare chemie. macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 0258-0322
DOI - 10.1002/masy.19930750117
Subject(s) - copolyester , polycarbonate , catalysis , dimethyl terephthalate , materials science , polymer chemistry , thermal stability , bisphenol a , chemistry , organic chemistry , composite material , polyester , epoxy
The synthesis of copolyesters via interchange reactions of polypivalolactone (PPVL) with bisphenol‐A polycarbonate (PC) and dimethyl terephthalate (DMT) was studied. Random copolyesters with high thermal stability were obtained by heating PPVL with PC and DMT in the melt at 280 °C in the presence of tetrabutylorthotitanate (TnBT) as a catalyst. Results from SEC measurements showed that the values for M n of these copolyesters ranged from 7,000 to 16,000. The process for preparing these copolyesters was studied in detail and based on the results of these studies, the reactions occurring during copolyester synthesis were discussed. It was found that in the early stages of the process mainly interchange reactions occurred between PPVL and PC chains, whereas the amount of terephthalate units increased only after longer reaction times.