Structure of Surface-Treated Layer withThe Mixture of Amino- and Mercapto-Functional Silane CouplingAgents on CaCO<sub>3</sub> Particles

堤 亮太, 佐々木 凱央, 橋口 千聖, 岡田 駿, 藤井 秀司, 中村 吉伸, 藤原 和子, 日笠 茂樹

doi:10.11618/adhesion.54.133

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アミノ基およびメルカプト基含有シランカップリング剤混合系で表面処理した炭酸カルシウム粒子表面上の処理層の構造解析
アミノキオヨビメルカプトキガンユウシランカップリングザイコンゴウケイデヒョウメンショリシタタンサンカルシウムリュウシヒョウメンジョウノショリソウノコウゾウカイセキ

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<p>Previously, the mechanical properties of calcium carbonate (CaCO₃) particles-filled isoprene rubber wasimproved by the surface treatment with a mixture of amino- and mercapto-functional silane coupling agents(SCA) having trialkoxy structure [J. Adhesion Soc. Jpn., 50, 131 (2014).]. To investigate the reinforcingmechanism, the treated layer on CaCO₃ surface was analysed. The quantity of SCA unremoved by alcoholwashing measured using thermogravimetry was greater for amino- than for mercapto-functional SCA and forthe tri- than for the dialkoxy structure. Almost all of adsorbed SCA was removed by water washing for thetreated with amino-functional SCA, because the adsorption of SCA is caused by an inonic interaction betweenamino group in SCA and CaCO₃ surface. The molecular mobility of polycondensate of the mixtures with thetrialkoxy structure measured using 1H pulse nuclear magnetic resonance had the least molecular mobility, i.e.,formed the highest density network. An inonic nteraction between the amino group and the CaCO₃ surface andhigh density network formation by trialkoxy structure were found to be important for effective reinforcement.</p>

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Journal of The Adhesion Society of Japan

Journal of The Adhesion Society of Japan 54 (4), 133-140, 2018-04-01

The Adhesion Society of Japan

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