Sunil,K Narayanankutty(Taylor & Francis, November 13, 2000)
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Abstract:
Cure characteristics and mechanical properties of short nylon fiber reinforced
acrylonitrile butadiene rubber-reclaimed rubber composites were studied. Minimum
torque, (maximum-minimum) torque and cure rate increased with fiber
concentration. Scorch time and cure time decreased by the addition of fibers.
Properties like tensile strength, tear strength, elongation at break, abrasion loss
and heat build up were studied in both orientations of fibers. Tensile and tear
properties were enhanced by the addition of fibers and were higher in the longitudinal
direction. Heat build up increased with fiber concentration and were
higher in the longitudinal direction. Abrasion resistance was improved in presence
of short fibers and was higher in the longitudinal direction. Resilience increased
on the introduction of fibers. Compression set was higher for blends.
Reena,Susan George; Dr.Rani,Joseph(Cochin University of Science and Technology, August , 1994)
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Abstract:
The overall objective of the present study was to
develop a novel and economic reclaiming process that does
not adversely affect the quality of rubber and to
investigate methods of utilising the reclaim. Since waste
latex products represent a potential source of high quality
rubber hydrocarbon, it was decided to develop a process
based on such latex wastes. The study revealed that latex
reclaim could replace raw natural rubber upto about 50 per
cent of its weight without any serious deterioration in
mechanical properties.
Description:
Department of Polymer Science and Rubber Technology,
Cochin University of Science and Technology
Sreeja, T D; Dr.Narayanankutty,Sunil K(Cochin University of Science & Technology, May , 2001)
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Abstract:
The thesis deals with the development of short nylon fiber-reclaimed
rubber/elastomer composites. Three rubbers viz, natural
rubber, acrylonitrile butadiene rubber and styrene butadiene rubber
were selected and were partially replaced with reclaimed rubber.
The blend ratio was optimized with respect to cure characteristics
and mechanical properties. Reclaimed rubber replaced 40 parts of
NR and SBR and 20 parts of NBR without much affecting the
properties. These blends were then reinforced with short nylon
fibers. The mechanical properties of the composites were studied
in detail. In all the cases the tensile strength, tear strength and the
abrasion resistance increased with increase in fiber content. In the
case of NRlreclaimed rubber blends, the tensile strength-fiberloading
relationship was non-linear where as in the case of
NBRlreclaimed rubber blends and SBRlreclaimed rubber blends
the tensile strength-fiber loading relationship was linear. All the
composites showed anisotropy in mechanical properties. The effect
of bonding system on the composite properties was also studied
with respect to cure characteristics and mechanical properties. For
this, a 20 phr fiber loaded reclaimed rubber/elastomer composites
were selected and the effect of MDI/PEG resin system was studied.
The resin used was 5 phr and the resin ratios used were 0.67: I, 1:1,
1.5:1 and 2:1. The bonding system improved the tensile strength,
tear strength and abrasion resistance. The best results are with
SBRlreclaimed rubber-short nylon fiber composites. The
optimized resin ratio was 1:1 MDI/PEG for all the composites.
Description:
Department of Polymer Science and Rubber Technology, Cochin University of Science and Technology