3种微生物脱硫废乳胶及其填充天然橡胶的性能对比

分别利用鞘氨醇单胞菌、脂环酸芽孢杆菌和酵母菌对废乳胶（WLR）进行脱硫再生，考察脱硫过程中微生物的生长情况以及脱硫前后WLR溶胀性和交联密度的变化，并研究WLR和脱硫WLR（DWLR）用量对天然橡胶（NR）拉伸性能和交联密度的影响。结果表明：3种微生物中，鞘氨醇单胞菌脱硫的WLR溶胀指数较大，交联密度较小。随着WLR用量的增大，填充NR硫化胶的拉伸强度和交联密度逐渐减小，拉断伸长率逐渐增大。DWLR/NR硫化胶的拉伸性能明显优于WLR/NR硫化胶，且鞘氨醇单胞菌脱硫的DWLR/NR硫化胶的拉伸性能明显优于其他两种微生物脱硫的硫化胶。;The waste latex rubber （WLR） was recycled by using sphingomonas，alicyclobacillus and yeast，respectively.The growth characteristics of the microorganisms and the desulfurization effect of WLR were studied，and the influence of the addition level of WLR on the tensile property and crosslink density of NR vulcanizates was investigated.The results showed that，the desulfurized WLR （DWLR） by sphingomonas possessed higher swelling index and less crosslink density.As the addition level of WLR （or DWLR） increased，the tensile strength and crosslink density of NR vulcanizates filled with WLR or DWLR decreased gradually，and the elongation at break increased obviously.The physical properties of DWLR/NR vulcanizates were better than those of WLR/NR，and the tensile property of NR vulcanizates filled with WLR desulfurized by sphingomonas was better