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采用湿法表面改性的纳米碳酸钙(nano-CaCO3)与VCM原位聚合,制备了nano-CaCO3原位聚合PVC树脂(简称原位PVC树脂),研究了其力学性能、加工性能、微观形貌和热稳定性等。结果表明:①nano-CaCO3能够很好地分散在PVC树脂中,对PVC基体产生很好的补强作用;与普通PVC试样相比,原位PVC试样缺口冲击强度提高到13.3 kJ/m2,效果显著;其加工性能也得到了提高。②试样冲击断面的扫描电子显微镜照片表明原位PVC试样为韧性断裂,普通PVC试样为脆性断裂。③DSC试验表明,原位PVC树脂的热稳定性优于纯PVC树脂。
In situ polymerization of nano-CaCO3 with nano-CaCO 3 and VCM by wet-process surface modification was used to prepare PVC resin (in situ PVC resin). The effects of mechanical properties, processing properties, microstructure Appearance and thermal stability. The results showed that: (1) nano-CaCO3 dispersed well in PVC resin and had a good reinforcing effect on PVC matrix. Compared with common PVC samples, the notched impact strength of in-situ PVC samples increased to 13.3 kJ / m2, The effect is remarkable; its processing performance has also been improved. (2) Scanning electron micrograph of the impact section of the sample shows that the PVC specimen in situ is a ductile fracture, and the ordinary PVC specimen is a brittle fracture. DSC test showed that in situ PVC resin thermal stability is better than pure PVC resin.