Semiflexible thermotropic liquid crystalline (TLC) polyesters with a mesogenic unit of 4,4'-diphenoxy terephthalate and two flexible spacers of decamethylene and hexamethylene were synthesized changing the ratio of two aliphatic units in a main chain. Those random copolyesters had the following sche
✦ LIBER ✦
Influence of pressure on a free radical decay in a rigid main chain thermotropic polymer
✍ Scribed by Ferenc Szőcs; Marta Klimová
- Publisher
- Elsevier Science
- Year
- 1991
- Tongue
- English
- Weight
- 155 KB
- Volume
- 27
- Category
- Article
- ISSN
- 0014-3057
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## Abstract Polyether polyurethane networks were prepared in solution at 25 and 60°C, using various organotin catalysts. The presence of a free‐radical initiator [viz. azobisisobutyronitrile (AIBN)] in the reaction media has no effect on the catalytic efficiency of organotin(IV) compounds, whereas