Effects of microscale calcium carbonate and nanoscale calcium carbonate on the fusion, thermal, and mechanical characterizations of rigid poly(vinyl chloride)/calcium carbonate composites

Autor: Cheng-Ho Chen, Chien-Hsin Yang, Shun-Fua Su, Chih-Chun Teng, Wen-Chang Wu
Rok vydání: 2005
Předmět:
Zdroj: Journal of Polymer Science Part B: Polymer Physics. 44:451-460
ISSN: 1099-0488
0887-6266
DOI: 10.1002/polb.20721
Popis: A Haake torque rheometer equipped with an internal mixer has been used to study the influence of microscale calcium carbonate (micro-CaCO3) and nanoscale calcium carbonate (nano-CaCO3) on the fusion, thermal, and mechanical characteris- tics of rigid poly(vinyl chloride) (PVC)/micro-CaCO3 and PVC/nano-CaCO3 composites, respectively. The fusion characteristics discussed in this article include the fusion time, fusion temperature, fusion torque, and fusion percolation threshold (FPT). The fusion time, fusion temperature, and FPT of rigid PVC/calcium carbonate (CaCO3) composites increase with an increase in the addition of micro-CaCO3 or nano-CaCO3. In contrast, the fusion torque of rigid PVC/CaCO3 composites decreases with an increase in the addition of micro-CaCO3 or nano-CaCO3. The results of thermal analysis show that the first thermal degradation onset temperature (Tonset) of rigid PVC/micro-CaCO3 is 7.5 8C lower than that of PVC. Meanwhile, the glass-transition temperature (Tg) of rigid PVC/ micro-CaCO3 is similar to that of PVC. However, Tonset and Tg of PVC/nano-CaCO3 com- posites can be increased by up to 30 and 4.4%, respectively, via blending with 10 phr nano-CaCO3. Mechanical testing results for PVC/micro-CaCO3 composites with the addition of 5-15 phr micro-CaCO3 and PVC/nano-CaCO3 composites with the addition of 5-20 phr nano-CaCO3 are better than those of PVC. V C 2005 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 44: 451-460, 2006
Databáze: OpenAIRE
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