聚醚偶联剂改性碳酸钙及CaCO_3/PP复合材料的性能

自制了偶联剂四氢呋喃均聚醚(PTHF),并用其对轻质碳酸钙表面进行处理,将处理后的碳酸钙填充到聚丙烯塑料中,探讨了新型改性剂对复合材料力学性能的影响。结果表明,四氢呋喃均聚醚能够使碳酸钙的吸油值降低到22%,接触角降低到68.6°。改性后的碳酸钙填充进聚丙烯,能在一定程度上缓解拉伸强度的下降趋势,使复合材料的断裂伸长率达到28.47%、冲击强度达到6.7kJ/m2。SEM观察四氢呋喃均聚醚添加前后复合材料的断面形态,表明碳酸钙在聚丙烯中分散良好。

Modification of calcium carbonate by polyether coupling and the properties of CaCO_3/PP material

Homemade agent-tetrahydrofuran polyether(PTHF) was used to treat the surface of the precipitated calcium carbonate.The impacts of surface modified CaCO3 with coupling agent of PTHF on CaCO3/PP mechanical properties of composite material were studied.The result showed that tetrahydrofuran polyether was able to make the oil absorption of calcium carbonate reduced to 22% and the contact angle decreased to 68.6°.CaCO3 with PTHF filling in the polypropylene can also alleviate the downward trend of the tensile strength to a certain extent,making the elongation at break of composites reached 28.47% and the impact strength of the composites reached 6.7 kJ/m2.Calcium carbonate with PTHF dispersed better in polypropylene than calcium carbonate by scanning electron microscopy(SEM).