Interfacial adhesion and mechanical properties of PMMA-coated CaCO3 nanoparticle reinforced PVC composites

✍ Scribed by Xuehua Chen; Chunzhong Li; Shoufang Xu; Ling Zhang; Wei Shao; H.L. Du

• Publisher: Elsevier
• Year: 2006
• Tongue: English
• Weight: 419 KB
• Volume: 4
• Category: Article
• ISSN: 1672-2515
• DOI: 10.1016/s1672-2515(07)60228-0

✦ Synopsis

Polymethyl methacrylate (PMMA)-coated nano-CaCO 3 particles were prepared by in-situ emulsion polymerization. The mechanical properties of nano-CaCO 3 particles-reinforced PVC were investigated using an AG-2000A universal testing machine and an XJU-2.75 izod impact tester; interfacial adhesion between CaCO 3 nanoparticles and PVC matrix by SEM, and structure of PMMA coated on the surface of CaCO 3 by FTIR and 1 H-NMR. The results indicate that the PMMA coated on the nano CaCO 3 particles consists mainly of syndiotactic structure, and their three tacticity contents were rr 52.8%, mm 7.3% and mr 39.9%, respectively. The interfacial adhesion between CaCO 3 nanoparticles and PVC matrix was significantly improved when the CaCO 3 nanoparticles were coated with PMMA, which led to increased Young's moduli and tensile strengths of the PMMA-coated CaCO 3 /PVC composites. The izod impact strengths of the composites were strongly affected by the PMMA coating thickness and increased significantly with increasing the volume fraction of CaCO 3 filler in the composites.