Copolyesters. III. Thermal degradation of poly(butylene terephthalate-co-adipate)s

✍ Scribed by Shinn-Jen Chang; Mei-Sui Chen; R. S. Chang; Shu-Mei Chen; Hong-Bing Tsai

• Publisher: John Wiley and Sons
• Year: 1990
• Tongue: English
• Weight: 377 KB
• Volume: 39
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/app.1990.070390202

✦ Synopsis

The copolyesters of poly(buty1ene terephthalate) and poly(buty1ene adipate) were prepared by melt polycondensation of 1,4-butanediol, terephthalic acid, and adipic acid. The thermal stability was important for their use a shot melt adhesives. The thermal degradation of these copolysters and homopolyesters was determined through TGA, change of acid number, IR, GPC, and NMR analyses. It was found that the thermal stability of the copolysters in oxygen decreased as the content of butylene adipate increased at temperature above and below T , . Thermal degradation occurred in oxygen even at temperature lower than T,, so that degradation would also occur at room temperature in air and embrittlement was found for these copolysters for long term service.