The effects of dynamic vulcanization systems including sulfur, peroxide, and sulfur/peroxide mixed vulcanization were investigated for dynamically-vulcanized blends of polylactic acid (PLA) and natural rubber (NR) at the PLA/NR ratio of 85/15. For the sulfur system, the CV sub-system (CV1), which used much lower accelerator (TBBS) content than the EV sub-system, rendered higher impact strength and higher %crystallinity. When compared to the peroxide system using DCP as a curative, the impact strength of CV1 sample was almost 4 times lower than the peroxide-cured sample even though their rubber domain sizes and size distributions were comparable. Interestingly, the highest impact strength which was almost 6 times that of the unmodified PLA/NR was achieved when using the mixed sulfur/peroxide system at the CV1/peroxide ratio of 30:70 (S30/DCP70). The lower impact strength of the sulfur-cured system (CV1) compared to those of the peroxide and the mixed-vulcanization systems was potentially due to its significantly higher % crystallinity.

研究了动态硫化体系（包括硫，过氧化物和硫/过氧化物混合硫化）对聚乳酸（PLA）和天然橡胶（NR）的动态硫化混合物的影响，其PLA / NR比率为85/15。对于硫磺系统，CV子系统（CV1）使用的促进剂（TBBS）含量远低于EV子系统，因此具有更高的冲击强度和更高的结晶度。与使用DCP作为固化剂的过氧化物体系相比，CV1样品的冲击强度几乎比过氧化物固化的样品低4倍，尽管它们的橡胶畴尺寸和尺寸分布相当。有趣的是，当使用CV1 /过氧化物比例为30:70（S30 / DCP70）的混合硫/过氧化物体系时，获得的最高冲击强度几乎是未改性PLA / NR的6倍。