SHEN Jingshu YE Weijun. EFFECT OF ANNEALING TIME ON THE GLASS TRANSITION,CRAZING AND MECHANICAL PROPERTIES FOR CAST FILMS OF POLY(METHYL METHACRYLATE)[J]. Acta Polymerica Sinica, 1996,(5):623-627.
SHEN Jingshu YE Weijun. EFFECT OF ANNEALING TIME ON THE GLASS TRANSITION,CRAZING AND MECHANICAL PROPERTIES FOR CAST FILMS OF POLY(METHYL METHACRYLATE)[J]. Acta Polymerica Sinica, 1996,(5):623-627.DOI:
Thin films of poly (methyl methacrylate)(PMMA) were prepared by caslang2wt%methvlelle chloride solution.These films were annealed at 70℃ for different timesrespectively.The glass transition
the polymer crazing and the mechanical properlies of annealed PMMA films were studied. The results show that the craze fibril stability
sIrelching stress and extention ratio at break decrease and the entllalpy endo-peak on the DSC curve shiftstoward highel temperature as the annealing time fmcreases. It means that the physical aging time strongly affects the condensed entanglement of macromolecularchains in PMMA films.