- Accession Number
- RT658-0011
- Document Delivery
- RT658: Document Delivery available
- Authors
- Basan
S. Karadag
E.
- Title
- THERMAL GELATION OF
POLY(VINYL CHLORIDE)
- Source
- Polymer International. 38(1):83-87, 1995 Sep.
- ISSN
- 0959-8103
- Author Keywords
- Thermal gelation. Poly(vinyl chloride). Crosslinking. Dynamic gelation.
Viscometry. Spectrophotometry.
- KeyWords Plus
- Spectrophotometric technique. Acrylonitrile copolymer.
- Abstract
- 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. [References: 14]
- Language
- English
- Publication Type
- Article
- Subset
- Current Contents/Physical, Chemical & Earth Sciences.
- CC Categories
- Organic chemistry/polymer science.
- Institution
- Reprint available from:
-
Basan S
-
CUMHURIYET UNIV
DEPT CHEM ENGN
SIVAS 58140
TURKEY
-
CUMHURIYET UNIV
DEPT CHEM
SIVAS 58140
TURKEY