Preparation and properties of RGTR/SMR/BR composites for solid tire core rubber

doi:10.16085/j.issn.1000-6613.2024-1543

Abstract

Abstract:

RGTR/SMR/BR tire core composites with low heat generation and high tear resistance was prepared by adding RGTR into SMR/BR. They were systematically investigated that the micro-morphology and green environmental performance of RGTR and the effects of RGTR dosages on the rheological properties, vulcanization properties, mechanical properties, aging properties, tear resistance and performance of heat generation by compression of SMR/BR tire core composites. The results revealed that the particle size of RGTR was about 239nm and it fully met the requirements of green environmental protection indicators. The Mooney viscosity of RGTR composites was lower than that of TRR composites, which could improve its fluidity. The addition of RGTR could shorten the curing time and improve the curing efficiency of tire core composites. The mechanical properties of RGTR composites decreased, but the tensile strength was more than 16MPa, the elongation at break was more than 400%, the tensile stress at 300% was more than 10MPa and the permanent deformation at break was less than 25% when the dosages was less than 40Phr., All the indexes could meet the requirements of tire core composites. The addition of RGTR could improve the aging resistance of the composites and greatly improve the tear resistance of the composites. When the filling fraction of RGTR was less than 50Phr., the tear strength was significantly higher than that of the composites with TRR up to 99N/mm. The addition of RGTR could greatly reduce the heat generation properties by compression of the composites. When the dosages was less than 60Phr., the heat generation temperature of compression was less than 30℃.

Key words: micro-oxygen micro-nano reclaimed ground tire rubber (RGTR), tire core rubber, vulcanization properties, mechanical properties, performance of heat generation by compression

摘要：

将绿色微氧微纳再生胶（micro-oxygen micro-nano reclaimed ground tire rubber，RGTR）加入到马来西亚标准胶/顺丁橡胶（standard Malaysian rubber/cis-polybutadiene rubber，SMR/BR）中，制备了低生热高耐撕裂RGTR/SMR/BR胎芯胶复合材料，研究了RGTR的微观形貌、绿色环保性能；RGTR用量对SMR/BR胎芯胶复合材料的流变性能、硫化特性、力学性能、老化性能、耐撕裂性能和压缩生热性能的影响。结果表明：RGTR粒径为239nm左右，完全符合绿色环保指标要求；添加RGTR复合材料的门尼黏度小于添加轮胎再生胶（tyre reclaimed rubber，TRR）复合材料，流动性提高；RGTR的加入可缩短胎芯胶复合材料的硫化时间，提高硫化效率；虽然复合材料力学性能有所下降，但填充份数小于40时，拉伸强度均大于16MPa，扯断伸长率大于400%，300%定伸应力大于10MPa，扯断永久变形小于25%，各项指标均能满足胎芯胶使用要求；提高了复合材料的耐老化性能；可提高复合材料的耐撕裂性能，当RGTR填充份数小于50时，撕裂强度明显高于添加TRR的复合材料，最高达到99N/mm；还可大大降低复合材料的压缩生热性能，填充份数小于60时，生热温度均低于30℃。

关键词: 微氧微纳再生胶, 胎芯胶, 硫化特性, 力学性能, 压缩生热性能

CLC Number:

TQ336

XU Yunhui, WANG Shifeng, ZAHEER Ul Haq, LI Junrong, TU Hui. Preparation and properties of RGTR/SMR/BR composites for solid tire core rubber[J]. Chemical Industry and Engineering Progress, 2025, 44(11): 6488-6496.

徐云慧, 王仕峰, ZAHEER Ul Haq, 李俊荣, 涂辉. 实心轮胎胎芯胶用RGTR/SMR/BR复合材料的制备与性能[J]. 化工进展, 2025, 44(11): 6488-6496.

Figures/Tables 12

References 18

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测试类别	项目	实测值	方法检出限/mg·kg^-1	标准	单位	结论	备注
化学成分检测	加热减量	0.8	—	1	%	符合
	灰分	9.1	—	10	%	符合
	丙酮抽出物	6.7	—	18	%	符合
欧盟RoHS指令检测	铅（Pb）	62	2	≤1000	mg/kg	符合
	镉（Cd）	N.D.	2	≤100	mg/kg	符合
	汞（Hg）	N.D.	2	≤1000	mg/kg	符合
	六价铬［Cr(Ⅵ)］	N.D.	2	≤1000	mg/kg	符合
	多溴联苯之和（PBB）	N.D.	—	≤1000	mg/kg	符合	为一溴联苯至十联苯每项方法检出限为5mg/kg
	多溴联苯醚之和（PBDE）	N.D.	—	≤1000	mg/kg	符合	为一溴联苯醚至十联苯醚每项方法检出限为5mg/kg
	邻苯二甲酸二丁酯（DBP）	N.D.	30	≤1000	mg/kg	符合
	邻苯二甲酸丁酯苄酯（BBP）	N.D.	30	≤1000	mg/kg	符合
	邻苯二甲酸二(2-乙基己基)酯（DEHP）	N.D.	30	≤1000	mg/kg	符合
	邻苯二甲酸二异丁酯（DIBP）	N.D.	30	≤1000	mg/kg	符合
高关注度物质（SVHC）检测	萘	0.278		高关注度物质在再生胶中的质量比小于0.1%	mg/kg	符合	质量之和为 53.719mg/kg，<1000mg/kg
	苊烯	—			mg/kg
	苊	—			mg/kg
	芴	—			mg/kg
	菲	5.58			mg/kg
	蒽	0.501			mg/kg
	荧蒽	7.8			mg/kg
	芘	29			mg/kg
	苯并(a)蒽	N.D.			mg/kg
	䓛	5.48			mg/kg
	苯并(b)荧蒽	2.32			mg/kg
	苯并(k)荧蒽	N.D.			mg/kg
	苯并(a)芘	N.D.			mg/kg
	茚并(1,2,3-cd)芘	N.D.			mg/kg
	二苯并(a,h)蒽	N.D.			mg/kg
	苯并(g,h,i)二萘嵌苯	2.76			mg/kg
	16项PAH总和	0.00537		0.1	%	符合

测试类别	项目	实测值	方法检出限/mg·kg^-1	标准	单位	结论	备注
化学成分检测	加热减量	0.8	—	1	%	符合
	灰分	9.1	—	10	%	符合
	丙酮抽出物	6.7	—	18	%	符合
欧盟RoHS指令检测	铅（Pb）	62	2	≤1000	mg/kg	符合
	镉（Cd）	N.D.	2	≤100	mg/kg	符合
	汞（Hg）	N.D.	2	≤1000	mg/kg	符合
	六价铬［Cr(Ⅵ)］	N.D.	2	≤1000	mg/kg	符合
	多溴联苯之和（PBB）	N.D.	—	≤1000	mg/kg	符合	为一溴联苯至十联苯每项方法检出限为5mg/kg
	多溴联苯醚之和（PBDE）	N.D.	—	≤1000	mg/kg	符合	为一溴联苯醚至十联苯醚每项方法检出限为5mg/kg
	邻苯二甲酸二丁酯（DBP）	N.D.	30	≤1000	mg/kg	符合
	邻苯二甲酸丁酯苄酯（BBP）	N.D.	30	≤1000	mg/kg	符合
	邻苯二甲酸二(2-乙基己基)酯（DEHP）	N.D.	30	≤1000	mg/kg	符合
	邻苯二甲酸二异丁酯（DIBP）	N.D.	30	≤1000	mg/kg	符合
高关注度物质（SVHC）检测	萘	0.278		高关注度物质在再生胶中的质量比小于0.1%	mg/kg	符合	质量之和为 53.719mg/kg，<1000mg/kg
	苊烯	—			mg/kg
	苊	—			mg/kg
	芴	—			mg/kg
	菲	5.58			mg/kg
	蒽	0.501			mg/kg
	荧蒽	7.8			mg/kg
	芘	29			mg/kg
	苯并(a)蒽	N.D.			mg/kg
	䓛	5.48			mg/kg
	苯并(b)荧蒽	2.32			mg/kg
	苯并(k)荧蒽	N.D.			mg/kg
	苯并(a)芘	N.D.			mg/kg
	茚并(1,2,3-cd)芘	N.D.			mg/kg
	二苯并(a,h)蒽	N.D.			mg/kg
	苯并(g,h,i)二萘嵌苯	2.76			mg/kg
	16项PAH总和	0.00537		0.1	%	符合

配方	Max.Mooney	M_V Mooney
1#	52.98	40.23
2#	49.17	31.30
3#	46.82	31.19
4#	48.51	31.09
5#	52.51	31.95
6#	53.25	32.22
7#	49.91	31.55
8#	50.89	31.38
9#	52.50	31.48
10#	52.84	31.43
11#	53.63	31.08

配方	Max.Mooney	M_V Mooney
1#	52.98	40.23
2#	49.17	31.30
3#	46.82	31.19
4#	48.51	31.09
5#	52.51	31.95
6#	53.25	32.22
7#	49.91	31.55
8#	50.89	31.38
9#	52.50	31.48
10#	52.84	31.43
11#	53.63	31.08

配方	M_L/dN·m	M_H/dN·m	（M_H-M_L）/dN·m	t₁₀/s	t₉₀/s	t₁₀₀/s
1#	1.11	13.73	12.62	68	195	599
2#	1.10	13.63	12.53	55	168	559
3#	1.08	13.51	12.43	52	167	532
4#	1.08	14.12	13.07	43	150	409
5#	1.15	13.22	12.04	44	146	397
6#	1.15	11.86	10.71	47	146	357
7#	1.16	11.92	10.76	46	150	324
8#	1.14	10.16	9.02	46	158	360
9#	1.18	9.23	8.05	46	170	377
10#	1.16	9.09	7.93	46	178	393
11#	1.08	7.65	6.57	47	180	406