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Properties of polyesters—a wide range

時間:2004-11-03
關鍵詞:Properties polyesters wide range 來源:International Symposium on Biological Polyesters ,Auguest 22-27, 2004

 

D. Scherzer

 

BASF Aktiengesellschaft, Ludwigshafen, Germany

 

Polyesters may have some common properties but they can be distinguished by their biodegradability, if bio-based, by their mechanical properties or by their processibility.

       The basic properties of aromatic polyesters like PET (polyethylenterephthalate), PPT (polypropyleneterephathalate or polytrimethylenterephthalate, PTT) and PBT (polybutyleneterephathalate) are compared with copolyesters like PBAT (polybutyleneadipate/terephthalate), with aliphatic polyester like PLA (polylactic acid), PHAs (polyhydroxyalcanoates), PBS (polybutylenesuccinate) and PCL (polycaprolactone). Markets and potential applications are discussed as well as life cycle assessments.

       All polyesters are more or less hydrolysable but only a minority is biodegradable according to international standards. Most of the polyesters based on renewable resources are biodegradable like PHAs or PLA, but also some polyesters based on fossil resources like PBAT, PBS and PCL biodegrade.

All polyesters are partly crystalline. The crystallinity and the content of aromatic compounds mainly determine the mechanical properties. PBT crystallizes faster than PPT and PET. Therefore PBT is used for injection molding and PPT and PET are more suitable for film and fibers production. In the lecture we try to give some answers how the composition of the polyester determines its properties and applications.

        論文來源:International Symposium on Biological Polyesters ,Auguest 22-27, 2004
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