Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5205017 | Polymer Degradation and Stability | 2006 | 5 Pages |
Abstract
Cycloolefin copolymers (COCs) with high glass transition temperature (Tg = 203 °C) have been synthesized and pelletized by extrusion molding. However, their colors change from transparent to yellow during extrusion molding because of thermal oxidation and generation of alkene groups. We have successfully blended several antioxidants (Irganox 1010, Irgafos 168, Irganox HP2225 and Irganox HP2921) into lab-made COCs to avoid the discoloration. The experimental results show that Irganox HP2921 is the best antioxidant among the antioxidants used and can effectively not only suppress thermal oxidation but also eliminate the color stain.
Related Topics
Physical Sciences and Engineering
Chemistry
Organic Chemistry
Authors
Mark O. Liu, Hong-Fan Lin, Ming-Ching Yang, Mei-Jyun Lai, Chih-Chieh Chang, Ming-Cheng Feng, Po-Ling Shiao, In-Mau Chen,