서지주요정보
Synthesis of telechelic vinyl prepolymers by radical polymerization = 라디칼중합을 이용한 텔레킬릭 비닐 프리폴리머의 합성에 관한 연구
서명 / 저자 Synthesis of telechelic vinyl prepolymers by radical polymerization = 라디칼중합을 이용한 텔레킬릭 비닐 프리폴리머의 합성에 관한 연구 / Jin-Seuk Kim.
저자명 Kim, Jin-Seuk ; 김진석
발행사항 [대전 : 한국과학기술원, 1998].
Online Access 원문보기 원문인쇄

소장정보

등록번호

8009297

소장위치/청구기호

학술문화관(문화관) 보존서고

DAME 98005

휴대폰 전송

도서상태

이용가능

대출가능

반납예정일

초록정보

We synthesized the novel ethane initiator, bis(2-hydroxy -1,1-diphenyl ethane) and investigated its initiating characteristics in radical polymerization. In the polymerization of styrene(St), the polymerization rate was proportional to the $0.84^{th}$ power of the initiator concentration. With MMA it was $0.69^{th}$ power. This result suggests that St shows more effective reversible termination than MMA. We have also investigated the polymerization rate, activation energy of polymerization, and changes in molecular weight. St, MMA and butyl acrylate(BA) polymerized but VAc did not. In the polymerization of St and MMA, bimodal distributions of molecular weights were observed and confirming the characteristics of 'living' radical polymerization. We synthesized the prepolymers of low molecular weight by monomer feeding method. α, ω - Hydroxy-terminated vinyl polymers were synthesized in the presence of a two-component iniferter consisted of an initiator and a chain transfer agent bearing the same functional group. 4,4'-Azobiscyanopropanol(ACPROL) and allyl alcohol(AA) were used as initiator and chain transfer agent respectively, to synthesize the polymers having hydroxyl group at both chain ends. The butyl acrylate prepolymer of molecular weight 3,100 and functionality 2.2 was prepared by the following condition; [BA]=3.85mol/L, [ACPROL]= 0.128mol/L and [AA]=0.90mol/L at 110℃. The produced butyl acrylate has the following properties; viscosity at 75℃=579cps, Tg=-45.8℃. The polyurethane reaction of the resulting telechelic polymers with MDI was carried out to obtain vinyl polymer-based polyurethanes. In case of poly(BA), the modulus were 46.9kgf/㎠, tensile strength at break 31.7kgf/㎠, and elongation at break were 226%. From these result, these telechelic polymers can serve as prepolymers for a variety of modifications like the synthesis of vinyl prepolymer-based polyurethane block copolymers.

서지기타정보

서지기타정보
청구기호 {DAME 98005
형태사항 xi, 142 p. : 삽도 ; 26 cm
언어 영어
일반주기 저자명의 한글표기 : 김진석
지도교수의 영문표기 : I-Whan Cho
지도교수의 한글표기 : 조의환
수록잡지명 : "Syntheis of Telechelic Vinyl Prepolymers by Two-Component Iniferter". Polymer. Elsevier Science Limited
학위논문 학위논문(박사) - 한국과학기술원 : 신소재공학과,
서지주기 Reference : p. 137-142
주제 Prepolymer
Vinyl
Telechelic
Iniferter
Radical polymerization
프리폴리머
비닐
텔레킬릭
이니퍼터
라디칼중합
QR CODE qr code