EFFECT OF PROCESSING AND COMPOSITION ON THE PROPERTIES OF PVC/ELASTOMER/NANO-CaCO3 COMPOSITE
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摘要: 详细研究了聚氯乙烯(PVC)、氯化聚乙烯(CPE)和纳米碳酸钙(Nano-CaCO3)的三元复合体系的加工工艺和组成变化与力学性能之间的关系。研究表明:如果先将CPE等弹性体和纳米CaCO3制成母粒,然后再与PVC进行混合,有利于纳米粒子在基体中的分散,在复合体系中,纳米CaCO3和CPE达到了协同增韧PVC的作用,同时,纳米CaCO3具有补强作用,且当母粒的组成为CPE/纳米CaCO3=1∶2时,对PVC改性效果最佳。Abstract: In this paper,the effect of the processing and composition on the mechanical properties of the PVC/elastomer/nano-CaCO3 ternary-phase composites was investigated in detail.Customarily, CPE or ACR as impact modifier and nano-CaCO3 was directly added to PVC. However, in this study, the master batch prepared by dispersing the nano-CaCO3 in CPE, as a novel modifier, was processed with PVC. Improved dispersion of nano-filler in the matrix (observed by SEM ) and good cooperation effect of nano-CaCO3 and CPE on the toughness were obtained during the processing, as the results showed. Improvement of mechanical properties of the blend system was preferred,when the proportion of CPE to nano-CaCO3 in the master batch is 1∶2.
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Key words:
- PVC /
- CPE /
- nano-CaCO3 /
- reinforcement /
- toughness
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