The influences of polyethylene glycol molecular weight on thermal stability, nonisothermal crystallization behavior, and morphology of poly(trimethylene terephthalate)/poly(ethylene oxide terephthalate) copolymers

摘要: Abstract A series of poly(trimethylene terephthalate)/poly(ethylene oxide terephthalate) copolymers with approximately 25 wt% PEG content were synthesized and investigated. The results showed that the thermal stability increased increasing M n, from 1000 to 4000 g/mol. However, copolymer  = 300 g/mol was better than  = 600 g/mol. nonisothermal crystallization kinetics analyzed using Ozawa Mo models, only method satisfactory in describing this system. Polarized optical microscopy revealed all could form ring banded spherulites temperature window for their formation basically identical copolymers. In addition, spherulitic growth rate curves exhibited a bell shape, both maximum corresponding increase .