Strain induced crystallization (SIC) of peroxide vulcanized natural rubber (NR)/ground tire rubber (GTR) composites is studied by combining mechanical and microstructural characterization techniques. It is found that the incorporation of GTR into the NR matrix leads to more effective reinforcement at large strains at room temperature in the NR/GTR composites as compared to the neat NR. It is attributed to (i) the presence of the GTR particles acting as reinforcing fillers owing their high carbon black content, and (ii) the nucleating effect of the GTR for SIC in the NR matrix inducing further reinforcement through the generation of an increasing number of oriented crystallites that behave as supplementary reinforcing fillers.

通过结合机械和微观结构表征技术研究过氧化物硫化天然橡胶 (NR)/磨碎的轮胎橡胶 (GTR) 复合材料的应变诱导结晶 (SIC)。研究发现，与纯 NR 相比，将 GTR 掺入 NR 基体可在室温下大应变下使 NR/GTR 复合材料更有效地增强。这归因于 (i) 由于碳黑含量高，GTR 颗粒作为增强填料的存在，以及 (ii) GTR 对 NR 基体中 SIC 的成核作用通过产生越来越多的碳黑诱导进一步增强定向微晶作为补充增强填料。