SONG Rui, CHEN Jing, GAO Jingui, LIN Xin, FANG Qingrong. THE STATE OF HIGH GLOBAL CHAIN ORIENTATION BUT NEARLY RANDOM SEGMENTAL ORIENTATION OF ATACTIC POLYSTYRENE[J]. Acta Polymerica Sinica, 1998,(2):144-148.
SONG Rui, CHEN Jing, GAO Jingui, LIN Xin, FANG Qingrong. THE STATE OF HIGH GLOBAL CHAIN ORIENTATION BUT NEARLY RANDOM SEGMENTAL ORIENTATION OF ATACTIC POLYSTYRENE[J]. Acta Polymerica Sinica, 1998,(2):144-148.DOI:
The atactic polystyrene (a PS) was slowly uni axial stretched at temperature 30℃ above its Tg.The resulting samples were characterized by a series of measurements.The results of IR dichroism
WAXD and optical birefringence all showed that in the segmental sense the samples were nearly isotropic
while the global orientation was remained
this can be indicated by the large elastic recovery of samples heated to temperatures above Tg.These samples showed large anisotropy in the solution swelling