서지주요정보
폴리우레탄-불포화 폴리에스터 IPN의 반응속도와 물성에 관한 연구 = Reaction kinetics and properties of polyurethane-unsaturated polyester IPN
서명 / 저자 폴리우레탄-불포화 폴리에스터 IPN의 반응속도와 물성에 관한 연구 = Reaction kinetics and properties of polyurethane-unsaturated polyester IPN / 이순종.
저자명 이순종 ; Lee, Soon-Jong
발행사항 [서울 : 한국과학기술원, 1989].
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소장정보

등록번호

4105541

소장위치/청구기호

학술문화관(문화관) 보존서고

MCE 8922

휴대폰 전송

도서상태

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리뷰정보

초록정보

Reaction kinetics of simultaneous interpenetrating polymer networks (SIN) composed of polyurethane (PU) and unsaturated polyester (UPE) was studied for the application of reaction injection molding (RIM) process. A differential scanning calorimeter (DSC) was used to monitor the polymerization reaction. The polyurethane network was prepared by reacting 4,4'-diphenyl methane diisocyanate(MDI), poly (tetramethylene ether glycol) (PTMG) and trimethyol propane (TMP) using cobalt naphthenate as the acatalyst, and the unsaturated polyester resin composed of phthalic anhydride, propylene glycol and fumaric acid was crosslinked with styrene in the presence of methyl ethyl ketone and cobalt naphthenate. The reaction kinetics during the IPN formation was very complicated since the reaction of the each component polymer affected each other in spite of the different reaction mechanisms. As the amount of PU in the simultaneous IPN (SIN) was increased, the polymerization of unsaturated polyester was retarded due to the cage effect of the polyurethane network which restricted the diffusion of the styrene monomer. The final conversion of the unsaturated polyester reaction decreased in SIN. However, the reaction rate of the unsaturated polyester was accelerated due to the catalytic effect of the isocyanate group on the initiator decomposition of the unsaturated polyester. On the other hand, the polyurethane reaction rate in SIN was not affected significantly by the reactants of unsaturated polyester. The mechanical properties were measured with variations in composition and crosslink density of the component polymer. From dynamic mechanical analysis (DMA), it was found that the component polymers were incompatible over the wide range of composition. Therefore, phase separation occurred between PU and UPE. When the content of PU was 40%, tensile strength showed a minimum value because PU was very incompatible with the unsaturated polyester. However when he content was above 60%, the tensile strength of PU was improved greatly by UPE. Tensile modules decreased and the elongation and impact strength increased as the polyurethane content was increased. When the polyurethane content was low (about 10%), the significant improvement of the impact strength of UPE due to the domain formation of PU rubbery phase from the partial phase separation of the two component polymers was observed. When crosslinking density was increased, the compatibility was enhanced and the mechanical properties were improved considerably.

서지기타정보

서지기타정보
청구기호 {MCE 8922
형태사항 [v], 67 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Soon-Jong Lee
지도교수의 한글표기 : 김성철
지도교수의 영문표기 : Sung-Chul Kim
학위논문 학위논문(석사) - 한국과학기술원 : 화학공학과,
서지주기 참고문헌 : p. 65-67
주제 Matter --Properties.
중합체. --과학기술용어시소러스
기계적 성질. --과학기술용어시소러스
Polymer networks.
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