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Citation: Pang Deren, Kong Fansheng, Huang Baotong. STRUCTURE AND PROPERTIES OF(NR+SBR)/PE BLENDS WITH RUBBER CURED BY DYNAMIC OR STATIC METHOD[J]. Chinese Journal of Applied Chemistry, ;1989, 6(6): 27-31. shu

STRUCTURE AND PROPERTIES OF(NR+SBR)/PE BLENDS WITH RUBBER CURED BY DYNAMIC OR STATIC METHOD

1.
Changchun Institute of Applied Chemistry, Academia Sinica

Received Date: 2 November 1988
Available Online: 27 March 1989

Morphology and mechanical properties of (NR+SBR)/PE blends with rubber uncured or fully cured by either dynamic or static vulcanization were studied by transmission and scanning electron microscopy. The results showed that in the case of non-vulcanization PE existed as a dispersed phase at (NR+SBR)/PE ratio(w/w) of 70/30 and as a continuous phase with ratio ≤50/50. The blends obtained by static vulcanization had the same morphology as the uncured blends. When the rubber was cured by the. dynamic method, PE always existed as a continuous phase.The tensile strength of the (NR+SBR)/PE blends increased with increase in PE content. The DSC and dynamic mechanical test results proved that method of rubber vulcanization was the prime factor responsible for the compatibility between blend components. The blends cured by static vulcanization had higher tensile strength than those by the dynamic method. This is considered as due to the difference in interpenetration between rubber and PE molecules, the penetration being in a higher degree in the static than in the dynamic vulcanization.
- Natural rubber,
- Styrene-butadiene rubber,
- Polyethylene Blend Vulcanization,
- Morphology,
- Mechanical property,
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