Hydrolysis of polycarbonate/polybutylene terephthalate blend
| Autor: | H. Van Oene, Mo-Fung Cheung, A. Golovoy |
|---|---|
| Rok vydání: | 1988 |
| Předmět: |
Absorption of water
Materials science Polymers and Plastics Izod impact strength test General Chemistry Activation energy Hydrolysis Polybutylene terephthalate chemistry.chemical_compound chemistry visual_art Materials Chemistry visual_art.visual_art_medium Composite material Polycarbonate Thermal analysis Embrittlement |
| Zdroj: | Polymer Engineering and Science. 28:200-206 |
| ISSN: | 1548-2634 0032-3888 |
| DOI: | 10.1002/pen.760280403 |
| Popis: | The hydrolysis of a polycarbonate/polybutylene terephthalate (PBT) blend (50/50) was investigated by immersing molded samples in water baths between 21 and 98°C. Samples were also placed in a 100°C air circulating oven (dry environment). Changes in impact properties, dynamic mechanical properties, molecular weight, and thermal properties were followed. In 80°C water bath the material was found to embrittle in five to six days, and in circulating air oven at 100°C in less than 90 days. A sharp decline in molecular weight and changes in thermal and mechanical properties were observed. The activation energy for the embrittlement process in water was found to be 22 kcal/ mole. This value is between the activation energy for the hydrolysis of PC and that of PBT. |
| Databáze: | OpenAIRE |
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