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Orientation and relaxation study of polystyrene: Polystyrene/poly(phenylene oxide) blends

✍ Scribed by Loic Messé; Robert E. Prud'homme

Publisher
John Wiley and Sons
Year
2000
Tongue
English
Weight
257 KB
Volume
38
Category
Article
ISSN
0887-6266

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✦ Synopsis

Polarization modulation infrared linear dichroism has been used to study the molecular orientation and relaxation of polystyrene/poly(2,6-dimethyl 1,4-phenylene oxide) (PS/PPO) miscible blends, containing up to 20% PPO, during and after a rapid uniaxial deformation above T g . In general, it is found that both the PS and PPO chain orientation functions increase with stretching rate and PPO content, and decrease with temperature. For all blends investigated, between T g ϩ 5 and T g ϩ 13 °C, the relaxation occurs at the same rate for PS and PPO and, therefore, the relaxation times calculated are similar indicating, under those conditions, a strong relaxation coupling between the two polymers at both short and long times.

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