Thermal gelation of poly(vinyl chloride)
| Autor: | Erdener Karadağ, Satılmış Basan |
|---|---|
| Přispěvatelé: | CUMHURIYET UNIV,DEPT CHEM,SIVAS 58140,TURKEY |
| Rok vydání: | 1995 |
| Předmět: |
Molar mass
CROSS-LINKING Polymers and Plastics medicine.diagnostic_test Organic Chemistry Kinetics POLY(VINYL CHLORIDE) Viscometer THERMAL GELATION Isothermal process Vinyl chloride Polyvinyl chloride chemistry.chemical_compound chemistry Chemical engineering Spectrophotometry Thermal Polymer chemistry Materials Chemistry medicine SPECTROPHOTOMETRY VISCOMETRY DYNAMIC GELATION |
| Zdroj: | Polymer International. 38:83-87 |
| ISSN: | 1097-0126 0959-8103 |
| DOI: | 10.1002/pi.1995.210380111 |
| Popis: | WOS: A1995RT65800011 The dynamic and isothermal gelation points of poly(vinyl chloride) (PVC) were determined using spectrophotometric and viscometric techniques. Four different PVC samples, with viscosity-average molar masses of 70000, 90000, 106000 and 141000, were used. The dynamic thermal gelation points of PVC samples heated to temperatures between 120 and 280 degrees C were found to be between 232 and 236 degrees C. Isothermal gelation times of PVC ((M) over bar(v) = 106000) heated at 170, 180, 190 and 200 degrees C were determined as 345, 177, 78 and 37 min., respectively. An inverse relationship between the tendency to dynamic and isothermal gelation with increase in molar mass of PVC samples was found. On the other hand, the tendency to isothermal gelation of PVC increases with raising temperature. |
| Databáze: | OpenAIRE |
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