原位插层聚合制备PVC/膨润土复合材料及性能初步研究

以新疆夏子街钠基膨润土为原矿制备的有机膨润土,通过原位插层聚合法制备了PVC/膨润土复合材料.通过对该复合材料的力学性能分析,复合材料的断裂伸长率为42%,比原PVC基体提高51.5%;复合材料的抗冲击强度为15.58 kJ/m2,比原PVC基体提高2.1倍;复合材料的拉伸强度为42.82 MPa,比原PVC基体提高14.6%.由此表明,复合材料的综合性能明显提高.SEM分析表明,PVC/膨润土复合材料具有明显的韧性特征;XRD分析表明,该复合材料是一种剥离型的复合材料.

Preliminary study on preparation and properties of PVC/bentonite composite with in-situ intercalation polymerization

PVC/bentonite composites were prepared by in-situ intercalation polymerization with organobentonite from Xiazijie Sodium-base bentonites.The FTIR spectrogram and X-ray Diffraction showed that the organic reagents had intercalated into the layers of bentonite after modification,and the silicate layer spacing of organobentonite attained 3.772nm,which was used in intercalation space for in-situ intercalation polymerization of PVC/bentonite composites.By mechanic properties tests showed that the elongation at break of PVC/bentonite composite attained 42%,and was increased by 51.5% compared to that of pure PVC;the impact strength attained 15.58748 kJ/m~2,and was increased by 2.1 times compared to that of pure PVC;the tensile strength attained 42.82MPa,and was increased by 14.6% compared to that of pure PVC.So the mechanical properties of PVC/bentonite composite prepared by in-situ intercalation polymerization were evidently improved.SEM analysis showed that PVC/bentonite composite had evident tenacity,and XRD analysis showed that PVC/bentonite composite was one kind of exfoliation composite.