Structure and Properties of Sidewall Compounds for Aircraft Tyre Modified by TBIR

doi:10.7503/cjcu20190113

Abstract

Abstract: Trans-1,4-poly(butadiene-co-isoprene) copolymer rubber(TBIR) was used to modify nature rubber(NR)/butadiene rubber(BR) blends for sidewall compounds in aircraft tyre, and the crystalline behavior, mechanical properties and vulcanization characteristics of the NR/BR/TBIR compounds, physical and mechanical properties, dynamic mechanical properties and filler dispersion of the NR/BR/TBIR vulcanizates were studied in details. The results indicate that the incorporation of crystalline TBIR endows the NR/BR/TBIR compounds higher green strength and Young's modulus. Blending TBIR with NR/BR, the optimum curing time(t_c90) and the crosslinking density of the compounds increased. The NR/BR/TBIR[m(NR)/m(BR)/m(TBIR)=80/10/10, 80/0/20] vulcanizates with TBIR incorporation showed 7% higher of 300% modulus, 35%-50% higher of flexural fatigue resistance and reduced rolling resistance compared with NR/BR vulcanizate. NR/BR/TBIR(80/10/10) vulcanizate presented better comprehensive properties with improved thermo-oxidative ageing resistance. With the extension of curing time, modulus at 100% of NR/BR/TBIR(80/10/10) vulcanizate was above 18% higher than NR/BR(80/20) vulcanizate. Flexural fatigue resistance of NR/BR vulcanizate was reduced by 60%, while only 50% of NR/BR/TBIR(80/10/10) vulcanizate. The NR/BR/TBIR vulcanizate showed reduced rolling resistance(8%-14% lower) and unchanged wet skid resistance. The filler dispersion improved with reduced filler aggregate size. NR/BR/TBIR(80/10/10) vulcanizate had good resistance to the longer curing time.

Key words: Trans-1,4-poly(butadiene-co-isoprene) copolymer rubber, Flex fatigue property, Heat built-up, Sidewall rubber in aircraft tyre

CLC Number:

O631

TrendMD:

ZHANG Yuefa, SHAO Huafeng, WANG Riguo, HE Aihua. Structure and Properties of Sidewall Compounds for Aircraft Tyre Modified by TBIR[J]. Chem. J. Chinese Universities, 2019, 40(8): 1733.

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