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J. Korean Ceram. Soc. > Volume 35(5); 1998 > Article
Journal of the Korean Ceramic Society 1998;35(5): 421.
Silane Coupling Agent 첨가에 의한 MDF Cement Composite의 수분안정성 연구
노준석, 김진태1, 박춘근1, 오복진1, 최상홀
한양대학교 무기재료공학과
The Study of Water Stability of MDF Cement Composite by Addition of Silane Coupling Agent
The effect of silane coupling agents on the water stability of HAC/PVA based MDF cement composites which were modified with urethane and epoxy resin were studied as a function of the functional groups and addition amount of silane coupling agent. According to the composition of polymer matrix the silanes with different functional groups showed the different effectiveness. In case of the only PVA matrix the silane with vinyl functional group was more effective than other silanes. When the epoxy resin was added the silane of epoxy-methodxy group enhanced the flexural strength of dry and wet state more than other. In case of urethane-added MDF cement the silane of diamine group was effective and enhanced the water sta-bility fo MDF cement composite more and more as the addition amount of silane increased, Especially in case of warm-presed composite the effect of silane was enhanced By addition of 2wt% of silane with 야-amine group the flexural strength of urethane-added composites were enhanced by 20% more in dry state 40-70% in wet state in accord with the porosity analysis. The flexural strength of the poxy resin-added MDF cement composite was increased by addition of 1wt% and 2wt% silane of epoxy-methoxy group However the addition of 4wt% of silane decreased the flexural strength of dry and wet state by formation of closed pore in the polymer matrix.
Key words: HAC/PVA based MDF cement, Epoxy resing. Urethane, Silane coupling agent, Functonal, Ex-turder, Warm press
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