Influence of tacticity on orientation and relaxation in uniaxially stretched polymethylmethacrylates

✍ Scribed by B. Jasse; A. K. Oultache; H. Mounach; J. L. Halary; L. Monnerie

• Publisher: John Wiley and Sons
• Year: 1996
• Tongue: English
• Weight: 632 KB
• Volume: 34
• Category: Article
• ISSN: 0887-6266
• DOI: 10.1002/(sici)1099-0488(19960915)34:12<2007::aid-polb6>3.0.co;2-w

✦ Synopsis

Orientation and relaxation behavior in uniaxially stretched stereoregular polymethylmethacrylate (PMMA) was investigated. When compared at a reference temperature T = Tg + constant, isotactic PMMA orients more readily and relaxes slightly faster than the conventional or syndiotactic polymers. Orientation relaxation of the different PMMAs can be reduced to a unique master curve, whatever the tacticity, when the results are compared a t same monomeric friction coefficient. 0 1996 John Wiley & Sons, Inc.