TITLE:
Influence of Poly(vinyl chloride) on Natural Rubber/Chlorosulfonated Polyethylene Blends
AUTHORS:
Manisara Phiriyawirut, Sawanya Luamlam
KEYWORDS:
Natural Rubber; CSM Rubber; Blend; Compatibilizer; Fuel Resistance; PVC
JOURNAL NAME:
Open Journal of Organic Polymer Materials,
Vol.3 No.4,
October
22,
2013
ABSTRACT: Blend of natural rubber (NR) and chlorosulfonated
polyethylene (CSM) was so interesting due to binding of the good oil resistance
of CSM, the good mechanical properties and low cost of NR. However, due to the
different polarities of two rubbers, phase separation and inferior properties
of NR/CSM blend were obtained. The practical way to improve its properties is
the addition of the third component to bind both phases of the blend. Effects
of poly(vinyl chloride), PVC as compatibilizer on cure characteristics,
morphology, mechanical properties and automotive fuel resistance of NR/ CSM
blend were investigated. In this contribution, NR/CSM blend with blend ratio of
50/50 was prepared using a two-roll mill, and then vulcanized in a compression
mold at 160°C. The PVC content was varied from 1 to 7 phr. It was found that
the usage of 7 phr PVC led to improve interaction between NR and CSM phases.
Therefore, increase in cure characteristics, mechanical strength and automotive
fuel resistance of the blend was observed.