非对称嵌段共聚物PI-b-PB对IR/BR并用胶相形态与性能的影响<sup>*</sup>

doi:10.11896/j.issn.1005-023X.2017.02.021

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Abstract The effect of asymmetric block copolymer of PI-b-PB (LIR-390) on phase morphology, processing capability and mechanical properties of isoprene rubber/butadiene rubber (IR/BR) blends was investigated in this study. The phase morphology of IR/BR blends characterized by atomic force microscopy (AFM) showed that LIR-390 was conducive to reduce the size of dispersed phase (BR) and uniformize the distribution of dispersed phase. When the concentration of LIR-390 in the blends was too high (7 phr), BR phase size increased and compatibilization effect of LIR-390 was attenuated. The rheological behavior of IR/BR uncured rubber was studied by HAAKE rotational rheometer and the result showed that the storage modulus (G′) was reduced due to the addition of LIR-390, which indicated that the addition of LIR-390 could mitigate energy consumption in the processing of rubber blends. Moreover, the blends′ resistances to fatigue crack growth were analyzed by crack growth test unit. It was found that the introduction of LIR-390 could reduce the dispersed phase size and thus lower the rate of crack growth, but excess LIR-390 (7 phr) would encourage crack growth.

Key words： LIR-390 IR/BR phase morphology processing capability fatigue crack growth

Published: 02 May 2018

CLC number:

TQ330.38

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	Articles by authors
	WANG Wenjin
	WANG Keqiang
	YE Shenjie
	MIAO Weijun
	CHEN Zhongren

Cite this article:

WANG Wenjin,WANG Keqiang,YE Shenjie, et al. Effect of Asymmetric Block Copolymer of PI-b-PB on Phase Morphology and Properties of IR/BR Blends[J]. Materials Reports, 2017, 31(2): 96-100.

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http://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2017.02.021 OR http://www.mater-rep.com/EN/Y2017/V31/I2/96

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