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요소수지의 (尿素樹脂) 접착력에 미치는 아세톤수지 첨가의 영향
김수창,배영수 ( Su Chang Kim,Young Soo Bae ) 한국산림과학회 1983 한국산림과학회지 Vol.60 No.1
Thermoplastic aceton-formaldehyde resin adhesive was added as a modifier for urea-formaldehyde resin adhesive and its effects on plywood smear strength and wood failure were investigated. The results are summarized as follows: 1) The plywood shear strength and wood failure showed the highest values at 120℃ of hot plate temperature, but the values decreased according to the rise of addition ratio of aceton resin. 2) The variation of molar ratio of aceton resin had no effect on plywood shear strength and wood failure. 3) The plywood bonded by the addition of aceton resin showed lower values than those of urea resin bonding plywoods in shear strength and wood failure. Therefore, aceton resin was inadequate as a modifier of urea resin adhesive.
조환,김수창,권영호,정원규,Cho, Hwan,Kim, Soo-Chang,Kwon, Yeung-Ho,Chung, Won-Kyu 한국섬유공학회 1980 한국섬유공학회지 Vol.17 No.2
Investigations were made of the use of polyamides and polyamides containing disulfide linkages as antistatic resin finishing agents for polyester (PET), polyester/cotton (T/C, 65/35%) and nylon fabrics. The details and preliminary results are presented in this paper. The polyamides were synthesized from 3, 3' -dithiodipropionyl chloride (DTDPC), 2,2'-dithiodiglycolyl chloride (CTDGC) and diamines, and the polyimide was synthesized from DTDPC and apueous ammonia, both by interfacial polycondensation on the surface of fabrics. Frictional electrostatic voltages were measured by the rotary static tester to determine the degree of antistaticity. Antistatic effects of the polymers containing disulfide linkages were recognized on those PET and T/C, which could be explained by assuming that the disulfide arrangements were converted to pseudo-conjugated double bond patterns. A few samples of nylon fabrics showed increase, rather than decrease, in electrostatic voltage; the phenomena seem to be the result of intermolecular crosslinking of the nylon's active hydrogen with DTDPC and DTDGC. The measurement of breaking strengths of nylon specimens made to examine formation of crosslinking indicated that the strengths of highly antistatic specimens remained unchanged while those of low antistatic specimens dropped significantly.