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레졸형 페놀수지의 경화 속도가 가교 밀도 및 기계적 물성에 미치는 영향

Effect of Curing Kinetics on the Cross-link Density and Mechanical Property of Resol Type of Phenolic Resin

최민호 정인재

Choi MH Chung IJ

HWAHAK KONGHAK, June 1998, 36(3), 399-406(8), NONE

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Abstract

레졸형 페놀수지의 여러 등온 경화 온도와 시간에 따른 경화 속도가 가교 밀도 및 기계적 물성에 미치는 영향에 대해 연구하였다. 레졸수지의 전환율과 가교 밀도는 경화 온도 및 경화 시간이 증가함에 따라 상승하였으며 활성화 에너지는 에폭시수지와 비슷하였다. 각 경화 온도에 대해 경화 시간이 길어짐에 따라 인장강도, 모듈러스, toughness는 증가하였고, 파괴연신율은 감소하였다. 그러나 경화가 급격히 진행되는 210℃에서의 기계적 물성은 경화가 늦게 진행되는 150℃ 및 180℃와 비교해 볼 때 비슷하거나 낮은 값을 보였다. 이러한 현상은 레졸수지의 경화시 발생되는 부산물인 물의 영향으로 판명되었다.

Resol type of phenolic resin was cured investigating the effect of curing kinetics on the cross-link density and mechanical property. Its conversion and cross-link density increased with isocuring temperature and time. It had almost the same value of activation energy for curing as general epoxy resins. The resol resin showed the increase in tensile strength, tensile modulus and toughness with isocuring time. It showed the decrease in elongation at break with isocuring time when cured at a fixed temperature. The resol resin cured at 210℃ had lower or equal mechanical properties with those resins cured at 150℃ and 180℃ because water vapor was generated as a by-product.

Keywords

Resol Resin Conversion Cross-link Density Mechanical Property

References

Kim SC, Choi CR, Chem. Ind. Technol., 67 (1992)
Knop A, Scheib W, "Chemistry and Application of Phenolic Resins," Springer-Verlag, Berlin (1979)
Tobolsky AV, Carlson DW, Indictor N, J. Polym. Sci., 54, 175 (1961)
Treolar LRG, "The Physics of Rubber Elasticity," 2nd Ed., Clarendon Press, Oxford (1959)
James HM, Guth E, J. Chem. Phys., 11, 455 (1943)
Tobolsky AW, Ph.D. Thesis, Princeton University (1943)
Craver CD, Provder T, Adv. Chem. Ser., 227, 215 (1990)
Gupta VB, Brahatheeswaran C, Polymer, 32(10), 1875 (1991)
Scott JM, Phillips DC, J. Mater. Sci., 10, 551 (1975)