폴리우레탄으로 강인화한 페놀수지와 목분 복합체의 물성

손원근; 박수길; 김영철; 신동근

Journal of the Korean Industrial and Engineering Chemistry, Vol.9, No.2, 238-242, April, 1998

Export Citation

폴리우레탄으로 강인화한 페놀수지와 목분 복합체의 물성

The Properties of Polyurethane Toughened-Phenolic Resin and Wood Powder Composites

손원근, 박수길, 김영철, 신동근

초록

복합체 제조의 최적조건을 얻기 위해 페놀수지와 목분의 함량을 변화시켜 제조하고 그들의 기계적 성질을 측정하였다. 페놀수지의 함량이 45wt%일 때 가장 높은 기계적 강도를 나타내었다. 또한 페놀수지와 목분 복합체의 기계적 성질을 개선하기 위해 페놀수지의 개질제로서 폴리우레탄을 사용하였다. Isocyanate 작용기를 갖는 폴리우레탄은 페놀수지와 잘 혼합되지 않기 때문에 상용성을 개선하기 위해 페놀 blocked 폴리우레탄을 합성하였다. 이들을 첨가한 복합체는 개질제 함량이 5wt%에서 최대의 기계적 강도를 나타냈다. 또한 210℃에서 경화된 복합체의 기계적 강도가 150℃에서 경화된 것보다 우수하였다.

Wood powder filled phenolic resin composites of different composition were prepared and their mechanical properties were investigated for optimum conditions. The composites showed maximum mechanical strength when the phenolic resin content was 45wt%. Polyurethane prepolymer(PU) was evaluated as a modifier of the phenolic resin composites. Blocking of the isocyanates in the PU with phenol was necessary for homogeneous mixing of raw meterials for the compoents. Maximum mechanical strength of the PU modified composites was observed when the PU content was 5wt%. It was found that the mechanical strength of the composites cured at 210℃ were higher than those of the composites cured at 150℃.

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[5] Ishida T, Saito H, Japan Patent, 07126485 (1995)

[6] Ishida T, Funatsu E, Japan Patent, 08047952 (1996)

[7] Myake S, Ishida T, Japan Patent, 07026116 (1995)

[8] Wu HD, Ma CC, Lin JM, J. Appl. Polym. Sci., 63(7), 911 (1997)

[9] Chiang WY, Yang SY, J. Appl. Polym. Sci., 37, 499 (1989)

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[11] Yamamoto K, Yasuzawa K, Nomoto M, Kumakura Y, Yoshimura Y, Japan Patent, 62225551 (1987)

[12] Takiyama E, Kusuki M, Fujikawa Y, Kubo M, Akagawa S, Japan Patent, 01103646 (1989)

[13] Chen GC, Wood Fiber Sci., 24, 307 (1992)

[14] Fukuda A, Hasegawa K, Horiuchi H, J. Appl. Polym. Sci., 29, 2395 (1984)

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[19] Moskala EJ, Howe SE, Painter PC, Coleman MM, Macromolecules, 17, 1671 (1984)

[20] Wu HD, Ma CCM, Lee MS, Wu YD, Die. Angrew. Makromol. Cheme., 235, 35 (1996)