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http://nopr.niscpr.res.in/handle/123456789/33331| Title: | Preparation of Chlorendic Acid Based Polyester Resins |
| Authors: | Gupta, S. K. Krishnan, M. Thampy, R. T. |
| Issue Date: | Dec-1978 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | Four polyesters were prepared by stepwise condensation of isophthalic acid, chlorendic acid and maleic anhydride with propylene glycol using p-toluenesulphonic acid as catalyst and xylene as entrainer. The quantities of maleic anhydride and propylene glycol used were 1 and 2.2 moles respectively and the molar ratios of chlorendic acid to isophthalic acid were 0.2, 0.8, 0.4, 0.6, 0.6, 0.4 and 0.8, 0.2 for the four polyesters prepared. The polyesters obtained bad better colour and relatively more uniform distribution of chlorendic acid over the polymer chain compared to the polyester made in one step. They were crosslinked using 30% by weight of styrene and were characterized through the determination of viscosity, gel time, peak exotherm and acid value. They were evaluated by measuring vicat softening point, heat distortion temperature, rate of flammability and rate of hydrolysis. The data reveal that the polyester obtained using chlorendic acid and isophthalic acid in molar ratio 0.6, 0.4 is the best among the four polyesters prepared. |
| Page(s): | 124-128 |
| ISSN: | 0975-1025 (Online); 0971-0426 (Print) |
| Appears in Collections: | IJFTR Vol.03(4) [December 1978] |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| IJFTR 3(4) 124-128.pdf | 518.31 kB | Adobe PDF | View/Open |
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