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首页> 外文期刊>Journal of Applied Polymer Science >Properties of HVA-2 vulcanized high density polyethyleneatural rubber/thermoplastic tapioca starch blends
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Properties of HVA-2 vulcanized high density polyethyleneatural rubber/thermoplastic tapioca starch blends

机译：HVA-2硫化高密度聚乙烯/天然橡胶/热塑性木薯淀粉共混物的性能

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摘要

Blending of high density polyethylene (HDPE), natural rubber (NR), and thermoplastic tapioca starch (TPS) has been studied. Two series of blends having 5 wt %, 10 wt %, 20 wt %, and 30 wt % TPS were prepared: (a) unvulcanized blends and (b) N, N′-m-phenylenebismaleimide (HVA-2) vulcanized HDPE/NR/TPS blends. The composition of HDPE/NR was fixed at blend ratio of 70/30. Tensile strength, Young's modulus, and elongation at break exhibited significant improvement when HDPE/NR/TPS blends were subject to HVA-2 crosslinker. Tensile strength increased to 1.4 MPa, 2.3 MPa, 3.4 MPa, and 5.1 MPa from 15 MPa, 12 MPa, 9.7 MPa, and 7.87 MPa of unvulcanized counterparts. SEM micrographs showed fine TPS dispersion and well embedded in vulcanized HDPR/NR matrix. Comparison were also made based on the results of gel content, thermogravimetric analysis (TGA), and dynamic mechanical analysis (DMA). The improvement in tensile properties, thermal stability, and blends modulus can be correlated to the crosslink formation within the NR phase.
机译：已经研究了高密度聚乙烯（HDPE），天然橡胶（NR）和热塑性木薯淀粉（TPS）的共混物。制备了两种具有5 wt％，10 wt％，20 wt％和30 wt％TPS的共混物：（a）未硫化的共混物和（b）N，N'-间苯撑双马来酰亚胺（HVA-2）硫化的HDPE / NR / TPS共混物。 HDPE / NR的组成固定为70/30的混合比。当HDPE / NR / TPS共混物经受HVA-2交联剂作用时，拉伸强度，杨氏模量和断裂伸长率显示出显着的改善。拉伸强度从未硫化的对应物的15 MPa，12 MPa，9.7 MPa和7.87 MPa增加到1.4 MPa，2.3 MPa，3.4 MPa和5.1 MPa。 SEM显微照片显示TPS分散性好，并且很好地嵌入了硫化的HDPR / NR基质中。还基于凝胶含量，热重分析（TGA）和动态力学分析（DMA）的结果进行了比较。拉伸性能，热稳定性和共混物模量的改善可以与NR相内的交联形成有关。

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