Copolyesters of isosorbide and 1,4‐butane diol were prepared by Ti(OBu)4‐catalyzed transesterifications with dimethyl terephthalate in bulk at temperatures up to 250°C. The content of isosorbide was considerably lower than expected from the feed ratio and the molar masses were low, so that no DSC measurements were conducted. Copolycondensations of isosorbide and 1,4‐butane diol with terephthaloyl chloride were either performed in dichloromethane at 40°C or in toluene at 100°C. The second method gave the higher molar masses. However, both series of polycondensations had the content of isosorbide roughly paralleled the feed ratios in common. The DSC measurements revealed that even 6 mol% of isosorbide is sufficient to raise the glass‐transition temperature (Tg) by 10–12°C (up to 55°C). With 50 mol% of isosorbide, the Tg reaches 100°C. Yet, incorporation of isosorbide also reduces the melting temperature Tm and the degree of crystallinity, and a mol percentage above 30% prevents crystallization completely. In summary, incorporation of isosorbide allows for fine‐tuning of Tg and Tm of poly(butylene terephthalate) over a wide range.
Influence of Isosorbide on Glass‐Transition Temperature and Crystallinity of Poly(butylene terephthalate)
Log in via your institution
Log in to Taylor & Francis Online
Restore content access
Restore content access for purchases made as guestPDF download + Online access
- 48 hours access to article PDF & online version
- Article PDF can be downloaded
- Article PDF can be printed
Issue Purchase
- 30 days online access to complete issue
- Article PDFs can be downloaded
- Article PDFs can be printed
Related Research
People also read lists articles that other readers of this article have read.
Recommended articles lists articles that we recommend and is powered by our AI driven recommendation engine.
Cited by lists all citing articles based on Crossref citations.
Articles with the Crossref icon will open in a new tab.