期刊
JOURNAL OF MACROMOLECULAR SCIENCE PART B-PHYSICS
卷 48, 期 2, 页码 282-298出版社
TAYLOR & FRANCIS INC
DOI: 10.1080/00222340802679607
关键词
dynamic vulcanization; cross-linking; poly(vinyl chloride); acrylonitrile-butadiene rubber; reactive processing; PVC; NBR blends
资金
- CAPES
Poly(vinyl chloride) (PVC)/acrylonitrile-butadiene rubber (NBR) blends can be obtained through a dynamic vulcanization process as a melt-processible thermoplastic elastomer which produces parts that look, feel and perform like vulcanized rubber with the advantage of being processible as a thermoplastic material. In this study, a vulcanized thermoplastic was obtained by in situ dynamic vulcanization of PVC/NBR blends using a sulphur/ tetramethylthiuram disulphide (TMTD) and mercaptobenzothiazyl disulphide (MBTS) curative system during processing at the melt state. The blends were melt-mixed using a Haake Rheomix 600. The curing behavior of NBR was then investigated by a Monsanto rheometer. The thermal analyses were performed and the cross-linking at different mixing times was calculated using DSC. FT-IR was also performed for characterization of the blends. The cross-link densities of the samples were measured by a swelling method. The degree of cure increases with the mixing time. The cross-linking formation was verified through the formation of C S bonds in the blends.
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