两步共混工艺制备聚碳酸酯/聚丙烯/针状硅酸盐三元纳米复合材料：降解与形态

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两步共混工艺制备聚碳酸酯/聚丙烯/针状硅酸盐三元纳米复合材料：降解与形态

毛立新; 高翔; 张猛响; 金日光

The College of Material Science and Technology, Beijing University of Chemical Technology, Beijing 100029, China

收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2006-04-28 发布日期:2006-04-28
通讯作者: 毛立新

Polycarbonate/Polypropylene/Fibrillar Silicate Ternary Nanocomposites via Two-step Blending Process: Degradation and Morphology

MAO Lixin; GAO Xiang; ZHANG Mengxiang; JIN Riguang

The College of Material Science and Technology, Beijing University of Chemical Technology, Beijing 100029, China

Received:1900-01-01 Revised:1900-01-01 Online:2006-04-28 Published:2006-04-28
Contact: MAO Lixin

摘要/Abstract

摘要： The method of two-step melt blending was used to prepare polycarbonate/polypropylene/attapulgite ternary nanocomposite, and the various techniques including gel permeation chromatography, rheometer, transmission electron microscope, dynamic mechanical analysis were used to examine the degradation of polycarbonate (PC) and the nanocomposite morphology. The results showed that the molecular weight degradation of PC triggered by attapulgite (AT) during the direct blending process was inhibited effectively by using two-step melt blending, in which AT was blended with polypropylene (PP) prior to compound with PC. The morphology of encapsulation was formed in the PC matrix, where PP encapsulates AT fibrillar single crystals to form a core-shell inclusion. Dynamic mechanical analysis (DMA) measurements showed that the PC/PP/AT ternary nanocomposites were more effective than conventional PC/PP blends in reinforcement, meanwhile the addition of AT in the ternary nanocomposites shifted the glass transition temperature of the PP phase to a higher value.

关键词: polycarbonate;polypropylene;attapulgite;nanocomposite;degradation;morphology

Abstract: The method of two-step melt blending was used to prepare polycarbonate/polypropylene/attapulgite ternary nanocomposite, and the various techniques including gel permeation chromatography, rheometer, transmission electron microscope, dynamic mechanical analysis were used to examine the degradation of polycarbonate (PC) and the nanocomposite morphology. The results showed that the molecular weight degradation of PC triggered by attapulgite (AT) during the direct blending process was inhibited effectively by using two-step melt blending, in which AT was blended with polypropylene (PP) prior to compound with PC. The morphology of encapsulation was formed in the PC matrix, where PP encapsulates AT fibrillar single crystals to form a core-shell inclusion. Dynamic mechanical analysis (DMA) measurements showed that the PC/PP/AT ternary nanocomposites were more effective than conventional PC/PP blends in reinforcement, meanwhile the addition of AT in the ternary nanocomposites shifted the glass transition temperature of the PP phase to a higher value.

Key words: polycarbonate, polypropylene, attapulgite, nanocomposite, degradation, morphology

毛立新, 高翔, 张猛响, 金日光. 两步共混工艺制备聚碳酸酯/聚丙烯/针状硅酸盐三元纳米复合材料：降解与形态[J]. , DOI: .

MAO Lixin, GAO Xiang, ZHANG Mengxiang, JIN Riguang. Polycarbonate/Polypropylene/Fibrillar Silicate Ternary Nanocomposites via Two-step Blending Process: Degradation and Morphology[J]. , DOI: .

参考文献

1    Jiang, W., Tjong, S.C., “Thermal stability of polycarbon-ate composites reinforced with potassium titanate whisk-ers: Effect of coupling agent addition”, Poly. Degrad. Stab., 66, 241—246(1999).
2    Li, Z.M., Yang, M.B., Hang, R., “Fibre formation based toughening in polycarbonate/polyethelene alloy com-patibilized with diallyl bisphenol A ether grafted poly-ethylene”, J. Mater. Sci., 36, 2013—2018(2001).
3    Mekhilef, N., Ait Kadi, A., Ajji, A., “Blends of modified polycarbonate and high density poltethylene”, Polym. Eng. Sci., 32(13), 894(1992).
4    Yoon, P.J., Humter, D.L., Paul, D.R., “Polycarbonate nanocomposites. Part 1.Effect of organoclay structure on   morphology and properties”, Polymer, 44, 5323—5324(2003).
5    Zhou, J., Liu, N., Li, Y., Ma, Y.J., “Microscopic structure characteristics of attapugite” , Silicate Bull., 6, 50—55(1999). (in Chinese)
6    Tian, M., Qu, C., Feng, Y., Zhang, L.Q., “Structure and properties of fibrillar silicate/SBR composites by direct blend process”, J. Mater. Sci., 38, 4917—4924(2003).
7    DU, Z. J., Rong, J., Li, H.Q., “Polyethylene/Palygorskite nanocomposites with macromolecular comb structure via in situ polymerization”, J. Mater. Sci., 38, 4863—4868(2003).
8    LeGrand, D.G., Brendler, J.T., Handbook of Polycarbon-ate Science and Technology, Marcel Dekker, New York (2000).
9    Yoon, P.J., Humter, D.L., Paul, D.R., “Polycarbonate nanocomposites: Part 2. Degradation and color forma-tion”, Polymer, 44, 5341—5354(2003).
10    Wu, W., Xu, Z.D., “Study on the reinforced and tough-ened PP blends with the rigid nano-particles and the elastic rubber particle”, Acta Polymerica Sinica, 1, 99—104(2000). (in Chinese)
11    Qian, B., Xu, G.F., She, F.S., Transition and Relaxation of Polymers, Science Press, Beijing, 356—366(1986). (in Chinese)
12    Kolaric, J., Jancar, J., “Ternary composites of polypropyl-ene/elastomer/calcium carbonate: Effect of functionalized components on phase structure and mechanical properties”, Polymer, 33, 4961—4967(1992).
13    Zhao, C.G., Feng, M., Gong, F.L., Qin, H.L., Yang, M.S., “Preparation and characterization of polyethylene-clay nanocomposites by using chlorosilane-modified clay”, J. Appl. Poly. Sci., 93, 676—680(2004) .
14    Premphet, K., Horanont, P., “Phase structure of ternary polypropylene/elastomer/filler composites: Effect of elastomer polarity”, Polymer, 41, 9283—9290(2000).