Structure and properties of nanocomposites based on PTT-block-PTMO copolymer and graphene oxide prepared by in situ polymerization

摘要: Abstract Poly(trimethylene terephthalate-block-tetramethylene oxide) (PTT-PTMO) copolymer/graphene oxide nanocomposites were prepared by in situ polymerization. From the SEM and TEM images of PTT-PTMO/GO nanocomposite, it can be seen that GO sheets are clearly well-dispersed PTT-PTMO matrix. also showed graphene was well exfoliated into individual sheets, suggesting polymerization is a highly efficient method for preparing nanocomposites. The influence on two-phase structure, melt viscosity mechanical properties block copolymer examined using DSC, ARES rheometer tensile tests. DSC results imply introduction did not affect glass transition temperature PTMO-rich soft phase, melting PTT hard phase degree crystallinity As loading increase, enhanced Young’s modulus yield stress observed. strength slightly increased with increase from 0 to 0.5 wt% when elongation at break higher or comparable value neat copolymer.