caa a22 4500 445384670 CHVBK 20180317143028.0 cr unu---uuuuu 170323e20110301xx s 000 0 eng 10.1007/s10924-010-0211-2 doi (NATIONALLICENCE)springer-10.1007/s10924-010-0211-2 Preparation of Natural Rubber/Condensed Tannin Semi-interpenetrating Polymer Network Composites by Hematin-Catalyzed Cross-Linking [Elektronische Daten] [Jun-ichi Kadokawa, Kazuhei Kodzuru, Satoshi Kawazoe, Tomoaki Matsuo] In this study, the preparation of semi-interpenetrating polymer network (semi-IPN) composites composed of natural rubber and condensed tannin was performed by means of the enzyme-mimetic cross-linking of condensed tannin catalyzed by hematin. Prior to the preparation of the composites, the hematin-catalyzed cross-linking behavior of condensed tannin was evaluated by the TGA measurement. The TGA results indicated that condensed tannin was sufficiently cross-linked by the hematin-catalyzed reaction in the presence of appropriate amounts of 30% (w/v) H2O2 aq. to give the relatively thermostable materials. For the preparation of the composites, a solution of condensed tannin and hematin, and subsequently 30% (w/v) H2O2 aq. were added to natural rubber latex and the mixture was stirred at room temperature for 10min to perform the cross-linking of condensed tannin, followed by drying of the reaction mixture at 50°C for 5h, which was subsequently put into a heat device and hot-pressed at 100°C and 20MPa for 20min to give the semi-IPN composite. The tensile stress-strain measurement of the composites was conducted to evaluate the mechanical properties, which were changeable depending on the weight ratios of natural rubber to condensed tannin and the amounts of 30% (w/v) H2O2 aq. Moreover, the miscibility of the cross-linked tannin with natural rubber in the composite was evaluated by the SEM measurement. Springer Science+Business Media, LLC, 2010 Natural rubber nationallicence Condensed tannin nationallicence Semi-IPN composite nationallicence Hematin catalysis nationallicence Enzyme-mimetic cross-linking nationallicence Kadokawa Jun-ichi Department of Chemistry, Biotechnology, and Chemical Engineering, Graduate School of Science and Engineering, Kagoshima University, Korimoto, 890-0065, Kagoshima, Japan aut Kodzuru Kazuhei Department of Chemistry, Biotechnology, and Chemical Engineering, Graduate School of Science and Engineering, Kagoshima University, Korimoto, 890-0065, Kagoshima, Japan aut Kawazoe Satoshi Department of Chemistry, Biotechnology, and Chemical Engineering, Graduate School of Science and Engineering, Kagoshima University, Korimoto, 890-0065, Kagoshima, Japan aut Matsuo Tomoaki Department of Biochemical Science and Technology, Faculty of Agriculture, Kagoshima University, Korimoto, 890-0065, Kagoshima, Japan aut Journal of Polymers and the Environment Springer US; http://www.springer-ny.com 19/1(2011-03-01), 100-105 1566-2543 19:1<100 2011 19 10924 https://doi.org/10.1007/s10924-010-0211-2 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10924-010-0211-2 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Kadokawa Jun-ichi Department of Chemistry, Biotechnology, and Chemical Engineering, Graduate School of Science and Engineering, Kagoshima University, Korimoto, 890-0065, Kagoshima, Japan aut NATIONALLICENCE 700 1- Kodzuru Kazuhei Department of Chemistry, Biotechnology, and Chemical Engineering, Graduate School of Science and Engineering, Kagoshima University, Korimoto, 890-0065, Kagoshima, Japan aut NATIONALLICENCE 700 1- Kawazoe Satoshi Department of Chemistry, Biotechnology, and Chemical Engineering, Graduate School of Science and Engineering, Kagoshima University, Korimoto, 890-0065, Kagoshima, Japan aut NATIONALLICENCE 700 1- Matsuo Tomoaki Department of Biochemical Science and Technology, Faculty of Agriculture, Kagoshima University, Korimoto, 890-0065, Kagoshima, Japan aut NATIONALLICENCE 773 0- Journal of Polymers and the Environment Springer US; http://www.springer-ny.com 19/1(2011-03-01), 100-105 1566-2543 19:1<100 2011 19 10924 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer