Fracture behavior of PVC/Blendex/nano-CaCO3 composites

✍ Scribed by Ning Chen; Chaoying Wan; Yong Zhang; Yinxi Zhang; Changming Zhang

• Publisher: John Wiley and Sons
• Year: 2004
• Tongue: English
• Weight: 352 KB
• Volume: 95
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/app.20786

✦ Synopsis

Abstract

PVC/Blendex/Nano‐CaCO~3~ composites were prepared by melt‐blending method. The Blendex (BLENDEX® 338) (GE Specialty Chemicals Co., Ltd., Shanghai, China) was an acrylonitrile‐butadiene‐styrene copolymer with high butadiene content. The fracture behavior of PVC/Blendex/nano‐CaCO~3~ composites was studied using a modified essential work of fracture model, U/A = u~0~ + u~d~l, where u~0~ is the limiting specific fracture energy and u~d~ is the dissipative energy density. The u~0~ of PVC/Blendex blend could be greatly increased by the addition of nano‐CaCO~3~, while the u~d~ was decreased. Nano‐CaCO~3~ with particle size of 38 nm increased the u~0~ of PVC/Blendex blend more effectively than that with particle size of 64 nm, when nano‐CaCO~3~ content was below 10 phr. Both the u~0~ and u~d~ of PVC/Blendex/nano‐CaCO~3~ composites were not much affected by increasing specimen thickness from 3 mm to 5 mm, while the two fracture parameters were increased with increasing loading rate from 2 mm/min to 10 mm/min, and u~d~ was found to be more sensitive to the loading rate than u~0~. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 95: 953–961, 2005