论文部分内容阅读
用直接填充分散法(熔融共混法)将微米、亚微米、纳米、纳米包覆微米级复合(微-纳米复合)碳酸钙(CaCO_3)填充到聚氯乙烯(PVC)基体中,制备出不同配比的PVC/CaCO_3复合材料,测量并对比分析了不同复合材料体系的力学性能,计算了复合材料的界面黏结强度。结果表明:多数情况下,PVC/CaCO_3复合材料比纯PVC具有更好的力学性能;改性CaCO_3比未改性CaCO_3填充的PVC复合材料的力学性能更高;纳米包覆重质CaCO_3比普通重质CaCO_3填充的PVC复合材料的力学性能更好;在四种CaCO_3样品中,普通轻质CaCO_3和超细轻质CaCO_3填充PVC复合体系的力学性能相对较好;就界面黏结强度而言,超细轻质CaCO_3与基体树脂的界面黏结强度最高,普通轻质CaCO_3的最低,纳米包覆CaCO_3(通过化学方法在重质CaCO_3表面生成纳米级CaCO_3)与PVC基体树脂的界面黏结强度比重质CaCO_3的高,改性后的CaCO_3与基体的界面黏结强度均有所提高。
The micro-submicron, nano-sized and nano-coated micro-nano composite calcium carbonate (CaCO 3) were filled into a polyvinyl chloride (PVC) matrix by a direct filling dispersion method The mechanical properties of different composites were measured and compared with those of PVC / CaCO_3 composites. The interfacial bonding strength of composites was calculated. The results show that the mechanical properties of PVC / CaCO_3 composites are better than that of pure PVC in most cases. The mechanical properties of modified CaCO_3 are higher than that of PVC composites filled with unmodified CaCO_3. The mechanical properties of CaCO_3-filled PVC composites are better. Among the four CaCO_3 samples, the mechanical properties of ordinary lightweight CaCO_3 and ultra-light CaCO_3-filled PVC composites are relatively good. In terms of interfacial bond strength, The interfacial bonding strength of lightweight CaCO_3 and matrix resin is the highest, the lowest of common light CaCO_3, and the interfacial adhesion strength of nano-coated CaCO_3 (nanoscale CaCO_3 by chemical method on the surface of heavy CaCO_3) and PVC matrix resin is higher than that of CaCO_3 , The interfacial bond strength between modified CaCO 3 and matrix increases.