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113. Irradiation-induced surface graft polymerization onto calcium carbonate nanoparticles and its toughening effects on polypropylene composites

Author

Ma, Chuan Guo, Rong, Min Zhi, Zhang, Ming Qiu, and Friedrich, Klaus

Subjects
Composite materials -- Research, Nanotechnology -- Research, Engineering and manufacturing industries, Science and technology, Research
Abstract

Nano-sized calcium carbonate was pretreated with silane coupling agent and then mixed with butyl acrylate that is of larger amount than the nanoparticles. Under γ-irradiation, graft polymerization occurred on the nanoparticle surface, forming a nanocomposite structure consisting of grafted poly(butyl acrylate) (PBA), homopolymerized PBA, and the segregated nanoparticles. It was found that the silane pretreatment significantly promoted the graft reaction. When the grafted nano-CaC[O.sub.3] particles were melt compounded with polypropylene (PP), an obvious synergistic effect, offered by (i) the chemical bonding between the elastomer type grafted PBA and nano-CaC[O.sub.3] and (ii) the deliberately introduced thick interlayer mainly constructed by the homopolymerized PBA, led to a significant increase in notch impact strengths and elongation to break of PP at a rather low content of nano-CaC[O.sub.3]. Meanwhile, the tensile stiffness of the composites was also slightly increased and the yielding strength of the composites was almost unchanged. The results are different from those with conventional rubber-toughened plastics, in which the improvement of ductility is acquired at high additive fraction and a great expense of strength performance. POLYM. ENG. SCI., 45:529-538, 2005. © 2005 Society of Plastics Engineers, INTRODUCTION Nanocomposites are attracting increasing research and market interest because of their potential for providing novel performance. It is believed that the tremendous interfacial area in a polymer nanocomposite helps [...]

Published
2005

118. Mechanical properties of low nano-silica filled high density polyethylene composites

Author

Zhang, Ming Qiu, Rong, Min Zhi, Zhang, Hai Bo, and Friedrich, Klaus

Subjects
Polyethylene -- Design and construction -- Chemical properties -- Models, Nanotechnology -- Models -- Design and construction, Engineering and manufacturing industries, Science and technology, Design and construction, Chemical properties, Models
Abstract

Modification of nanoparticles through graft polymerization is able to change the chemical nature of the particles' surfaces and provides an effective means for the preparation of nano-fillers specified for composites manufacturing. The present work focuses on the mechanical role of grafted nano-[Sio.sub.2] particles in high density polyethylene composites prepared by melt compounding. The experimental results show that at a content of 0.75 vol%, the modified nano-silica results in a rise in tensile stiffness, tensile strength and impact strength of the composites. The grafted nanoparticles can improve the mechanical performance of the matrix polymer more effectively than the untreated version. In addition, a further enhancement of the composites stiffness and strength can be achieved by crosslinking the concentrated masterbatches, which has not yet been revealed in the authors' previous works on grafted nano-[SiO.sub.2] particles/polypropylene composites. It is thus revealed that the introduction of the graf ting polymers onto the nanoparticles increases the tailorability of the composites., INTRODUCTION It has been demonstrated that inorganic nanoparticles are promising fillers in the modification of polymers. In contrast to the routinely used micrometer-sized particulates, nanoparticles are able to provide polymer [...]

Published
2003

120. Contributor contact details

Author

Tjong, S.C., primary, Mai, Yiu-Wing, additional, Cheng, Xinjian, additional, Tjong, S.C., additional, Li, Robert K.Y., additional, Psarras, G.C., additional, Smith, R.C., additional, Nelson, J.K., additional, Schadler, L.S., additional, Li, Ai-Dong, additional, Liu, Wen-Chao, additional, Fu, Shao-Yun, additional, Lee, Kwang-Pill, additional, Gopalan, A., additional, Komathi, S., additional, Raghupathy, D., additional, Pissis, P., additional, Kripotou, S., additional, Kyritsis, A., additional, Bao, S.P., additional, Tang, C.Y., additional, Geng, Y., additional, Li, J., additional, Kim, J.K., additional, Dasari, A., additional, Cai, G.-P., additional, Yu, Z.-Z., additional, Chen, Pei, additional, Wong, Shing-Chung, additional, Lu, Chunsheng, additional, Yang, Mingshu, additional, Zhang, Shimin, additional, Qin, Huanli, additional, Liu, T.X., additional, Huang, S., additional, Thomassin, Jean-Michel, additional, Jérôme, Robert, additional, Detrembleur, Christophe, additional, Molenberg, Isabel, additional, Huynen, Isabelle, additional, Ma, Chen-Chi M., additional, Hsiao, Min-Chien, additional, Liao, Shu-Hang, additional, Yen, Ming-Yu, additional, Teng, Chih-Chun, additional, Hsiao, Min-Hsuan, additional, Teo, W.E., additional, Kaur, S., additional, Seeram, Ramakrishna, additional, Lu, Yang, additional, Yu, Shu-Hong, additional, Zeng, Wei, additional, Guo Chen, Shi, additional, Zhao, Bin, additional, Rong, Min Zhi, additional, Zhang, Ming Qiu, additional, Gao, Wei, additional, Li, Zhengwei, additional, Marouf, B.T., additional, Bagheri, R., additional, Pearson, R.A., additional, Liang, Y.L., additional, Lu, Yong-Lai, additional, Zhang, Li-Qun, additional, Xie, Xiao-Lin, additional, Du, Fei-Peng, additional, Li, Yu Chao, additional, and Tjong, Sie Chin, additional

Published
2010
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123. Impact and wear resistance of polymer nanocomposites at low filler content

Author

Wetzel, Bernd, Haupert, Frank, Friedrich, Klaus, Zhang, Ming Qiu, and Rong, Min Zhi

Subjects
Epoxy compounds -- Composition -- Usage, Nanotechnology -- Usage -- Thermal properties -- Mechanical properties -- Research, Polymers -- Usage, Engineering and manufacturing industries, Science and technology, Thermal properties, Usage, Mechanical properties, Composition, Research
Abstract

It is well known that inorganic filler particles enhance the mechanical and tribological properties of polymers. The stiffness, toughness, and wear performance of the composites are extensively, determined by the size, shape, volume content, and especially the dispersion homogeneity of the particles. In the present study, various amounts of micro- and nano-scale particles (titanium dioxide Ti[O.sub.2], 200-400 nm, calcium silicate CaSi[O.sub.3], 4-15 μm) were introduced into an epoxy polymer matrix for its reinforcement. The influence of these particles on the impact strength, dynamic mechanical thermal properties, and block-on-ring wear behavior was investigated. Using only the nano-particles, the results demonstrate the best improvement in stiffness, impact strength, and wear resistance of the epoxy at a nano-particle content of 4 vol% Ti[O.sub.2]. Therefore, this nanocomposite was used to act as a matrix for the CaSi[O.sub.3] micro-particles, in the hope of finding synergistic effects between the mic ro- and the nano-particles. Results show, in fact, a further improvement of wear resistance and stiffness, whereas the impact strength suffers. Geometrical properties of the particles, the homogeneous dispersion state, energy dissipating fracture mechanisms, and a transition of wear mechanisms mostly contribute to the increase in performance., 1 INTRODUCTION Improved mechanical properties are known to be effectively achieved by the inclusion of small inorganic particles into polymers. For applications in hard working conditions, such as slide bearings, [...]

Published
2002

126. List of Contributors

Author

Altstädt, Volker, primary, Bahadur, Shyam, additional, Bijwe, Jayashree, additional, Blanchet, Thierry A., additional, Bogdanovich, Sergei P., additional, Briscoe, Brian J., additional, Browning, Robert L., additional, Burris, David L., additional, Chang, Li, additional, Chen, Zhong, additional, Choudhury, Namita Roy, additional, Coddet, Christian, additional, Dan, Li, additional, Dasari, Aravind, additional, Dutta, Naba K., additional, Felhös, David, additional, Friedrich, Klaus, additional, Gebhard, Andreas, additional, Haupert, Frank, additional, Hufenbach, Werner, additional, Iwamura, Eiji, additional, Jacobs, Olaf, additional, Ji, Liang, additional, Jiang, Han, additional, Kannan, Aravindaraj Govindaraj, additional, Karger-Kocsis, Jözsef, additional, Kato, Koji, additional, Könya, Lászlö, additional, Kunze, Klaus, additional, Langkamp, Albert, additional, Lewis, Sarah L., additional, Liao, Hanlin, additional, Liu, inxing, additional, Luo, Ying, additional, Mai, Yiu-Wing, additional, Myshkin, Nikolai K., additional, Pei, Xianqiang, additional, Perry, Scott S., additional, Pesetskii, Stepan S., additional, Qian-Ming, Gong, additional, Rong, Min Zhi, additional, Ruckdäschel, Holger, additional, Sandler, Jan K.W., additional, Santos, Katherine, additional, Sawyer, W. Gregory, additional, Schädel, Birgit, additional, Schadler, Linda S., additional, Schlarb, Alois K., additional, Schwartz, Cris J., additional, Sinha, Sujeet K., additional, Sue, Hung-Jue, additional, Yu, Zhong-Zhen, additional, Váradi, Károly, additional, Wang, Qihua, additional, Wu, Linda Y.L., additional, iao-Su, Yi, additional, Ye, Lin, additional, Zhang, Ga, additional, Zhang, Ming Qiu, additional, Zhang, Zhong, additional, and Zhi, Li, additional

Published
2008
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133. Advanced functional polymer materials

Author

Wang, Kaojin, primary, Amin, Kamran, additional, An, Zesheng, additional, Cai, Zhengxu, additional, Chen, Hong, additional, Chen, Hongzheng, additional, Dong, Yuping, additional, Feng, Xiao, additional, Fu, Weiqiang, additional, Gu, Jiabao, additional, Han, Yanchun, additional, Hu, Doudou, additional, Hu, Rongrong, additional, Huang, Die, additional, Huang, Fei, additional, Huang, Feihe, additional, Huang, Yuzhang, additional, Jin, Jian, additional, Jin, Xin, additional, Li, Qianqian, additional, Li, Tengfei, additional, Li, Zhen, additional, Li, Zhibo, additional, Liu, Jiangang, additional, Liu, Jing, additional, Liu, Shiyong, additional, Peng, Huisheng, additional, Qin, Anjun, additional, Qing, Xin, additional, Shen, Youqing, additional, Shi, Jianbing, additional, Sun, Xuemei, additional, Tong, Bin, additional, Wang, Bo, additional, Wang, Hu, additional, Wang, Lixiang, additional, Wang, Shu, additional, Wei, Zhixiang, additional, Xie, Tao, additional, Xu, Chunye, additional, Xu, Huaping, additional, Xu, Zhi-Kang, additional, Yang, Bai, additional, Yu, Yanlei, additional, Zeng, Xuan, additional, Zhan, Xiaowei, additional, Zhang, Guangzhao, additional, Zhang, Jie, additional, Zhang, Ming Qiu, additional, Zhang, Xian-Zheng, additional, Zhang, Xiao, additional, Zhang, Yi, additional, Zhang, Yuanyuan, additional, Zhao, Changsheng, additional, Zhao, Weifeng, additional, Zhou, Yongfeng, additional, Zhou, Zhuxian, additional, Zhu, Jintao, additional, Zhu, Xinyuan, additional, and Tang, Ben Zhong, additional

Published
2020
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144. Contributor contact details

Author

Kato, Makoto, primary, Usuki, Arimitsu, additional, Becker, Ole, additional, Simon, George, additional, Sinha Ray, Suprakas, additional, Bousmina, Mosto, additional, Jayaraman, Krishnamurthy, additional, Kumar, Sharad, additional, Yei, Ding-Ru, additional, Fu, Huei-Kuan, additional, Chang, Feng-Chih, additional, Tang, Tao, additional, Tong, Xin, additional, Feng, Zhiliu, additional, Huang, B., additional, Decker, Christian, additional, Strawhecker, Kenneth E., additional, Manias, Evangelos, additional, Ha, Chang-Sik, additional, Zanetti, Marco, additional, Vittoria, Vittoria, additional, Sorrentino, Andrea, additional, Gorrasi, Giuliana, additional, Tortora, Mariarosaria, additional, Mohammad, Abubaker, additional, Liao, Kin, additional, Ren, Yu, additional, Xiao, Tan, additional, Kuzumaki, Toru, additional, Ok Park, O., additional, Park, Jong Hyeok, additional, Kim, Tae-Ho, additional, Lu, Xuehong, additional, Liu, Tianxi, additional, Millan, Angel, additional, Palacio, Fernando, additional, Snoeck, Etienne, additional, Serin, Virginie, additional, Lecante, Pierre, additional, Chiang, Chin-lung, additional, Ma, Chen-Chi M., additional, Meng, Yuezhong, additional, Zhang, Ming Qiu, additional, Rong, Min Zhi, additional, and Friedrich, Klaus, additional

Published
2006
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