芳香酸钙刚性粒子增韧聚氯乙烯

选用硬脂酸(HSt)与钛酸酯偶联剂131分别对芳香酸钙(CaT)表面进行处理;观察了处理前后CaT在聚氯乙烯(PVC)中的分散状况与界面结合。研究了CaT对PVC拉伸性能、冲击性能的影响。结果表明,CaT表面未处理,当其含量为4份时,PVC的缺口冲击强度由2.9kJ/m~2提高至3.6kJ/m~2,拉伸强度略有上升;CaT表面经3%HSt处理后,分散性能变好,改性效果明显,当其含量为4份时,PVC的综合性能最好,其拉伸强度由53.5MPa提高至56.0MPa,缺口冲击强度由2.9kJ/m~2上升至3.7kJ/m~2。CaT表面经2%钛酸酯偶联剂131处理后,界面结合性能明显变好,当其含量为6份时,PVC的综合性能最好,其拉伸强度由53.5MPa上升至57.5MPa左右,缺口冲击强度由2.9kJ/m~2上升至4.05kJ/m~2;扫描电子显微镜发现CaT表面处理后,在PVC中分散更加均匀,界面结合得更好,更大程度发挥了刚性粒子增韧效果。

Polyvinyl Chloride Toughen by Aromatic Acid Calcium Rigid Particle

The surface of CaT were treated by stearic acid (HSt) or titanate coupling agent 131. The dispersion of CaT in polyvinyl chloride (PVC) was observed by electron microscopic scanning (SEM) before and after treatment. The effect of CaT on the tensile properties and impact properties of polyvinyl chloride (PVC) was studied. It is found that when CaT content is 4 phr without treatment is added,the impact strength of PVC is increased from 2.9 kJ/m2 to 3.6 kJ/m2,and the tensile strength is increased slightly;When the surface of CaT is treated by 3% HSt,the dispersion performance of PVC is improved,and the effect is obvious. When CaT content is 4 phr,the comprehensive performance of PVC is best,and the tensile strength is increased from 53.5 MPa to 56.0 MPa,and the notched impact strength is increased from 2.9 kJ/m2 to 3.7 kJ/m2;When the surface of CaT is treated by 2% titanate coupling agent 131,the interface binding properties of PVC is significantly better. When CaT content is 6 phr, the comprehensive performance is best,and the tensile strength of PVC is increased from 53.5 MPa to 57.5 MPa, and the notched impact strength is increased from 2.9 kJ/m2 to 4.05 kJ/m2; The SEM photo shows that when the surface of CaT is treated, the dispersion is more uniform,the interface is more firmly,and the rigid particle toughening effect is better.