不同粒径胶粉的成分分析及在胎面胶中的应用

Composition analysis of rubber powder with different particle size and its application in tread compound

通过热重法和红外光谱分析及测定硫含量和粒径分布等方式对用超低温粉碎法制备的不同粒径胶粉的成分进行了分析,并开展了其在商用车轮胎胎面胶中的加工应用研究。结果表明,4种不同胶粉中的挥发分、有机物、炭黑和灰分含量均差别较小,其中有机物质量分数在61%~65%之间,炭黑质量分数在28%~30%之间,含硫质量分数在2%左右,粒径从小到大依次为牌号K 0004、K 0002-R、W 0004和W 0406的胶粉。在商用车胎面胶中添加10份(质量)胶粉,混炼胶的门尼黏度增大,门尼焦烧时间缩短,硫化速率加快。胶粉粒径越小其对硫化胶物理机械性能的影响越小,而硫化胶损耗因子的变化与胶粉粒径的相关性较小。

The composition of ultra-low temperature pulverization rubber powders with different particle sizes was analyzed by thermogravimetry and infrared spectroscopy,and sulfur content and particle size distribution were determined,their processing and application properties in tread compounds of commercial vehicle were also studied.The results showed that the volatile,organic,carbon black and ash content in the four different rubber powders were less different,mass fraction of organic matter of four rubber powders was 61%-65%,mass fraction of carbon black was 28%-30%and mass fraction of sulfur was about 2%,the particle sizes of rubber powders from small to large was brand K 0004,K 0002-R,W 0004 and W 0406.Adding 10 phr(mass)rubber powders to tread compound of commercial vehicle could increase Mooney viscosity,shorten scorch time,and speed up curing rate of the compounds.The smaller the rubber powders particle sizes,the smaller effect on the physical and mechanical properties of vulcanizate,while the change of loss factor of the vulcanizate has little correlation with particle sizes of the rubber powders.