MECHANICAL AND OPTICAL INVESTIGATIONS OF SOME POLYMER BLENDS CONTAINING PVC

Dynamic and static mechanical spectra of polyvinylchloride (PVC)/acryl onitrile-butadiene rubber (NBR), PVC/styrene-butadiene rubber (SBR) an d PVC/acrylonitrile-butadiene-styrene terpolymer (ABS) blends have bee n studied. The constituent compounding conditions were held constant. Mechanical investigations reveal that blends are partially compatible for 60 wt% PVC in the blends. UV absorption spectra for PVC/NBR blends have been investigated New bands were observed at 280 and 330 nm, whi ch may be due to the formation of a compatible phase lying on the grai n boundary between PVC and the NBR rubber domain, as observed by a pol arized optical microscope. (C) 1996 Elsevier Science Ltd.