서지주요정보
고광택 HIPS의 제조와 열 괴상 중합시 grafting과 crosslinking의 예측 = Preparation of high gloss HIPS and prediction of grafting and crosslinking in thermal bulk process
서명 / 저자 고광택 HIPS의 제조와 열 괴상 중합시 grafting과 crosslinking의 예측 = Preparation of high gloss HIPS and prediction of grafting and crosslinking in thermal bulk process / 박준용.
저자명 박준용 ; Park, Joon-Yong
발행사항 [대전 : 한국과학기술원, 1993].
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소장정보

등록번호

8003879

소장위치/청구기호

학술문화관(문화관) 보존서고

MCHE 93027

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초록정보

Analytic expressions for grafting and crosslinking of PBD (Polybutadiene) during the bulk thermal polymerization of HIPS(High Impact Polystyrene) were derived by use of the moments of the distribution function. The chain transfer ratio term, f $k_5/k_3$, was determined by the linear correlation between GE (Grafting Efficiency) and ln 1/(1-X), which was found to independent of temperature. The crosslinkings drastically increased at the high temperature, 190℃, and high conversion, about 95%. These formulas can be also applied for the polymerization initiated by initiators with some modifications. In order to control the particle size distribution of PBD, PS was added at initial solution(homogeneous adding, A series), shortly after phase inversion(heterogeneous adding, B series) and bimodal molecular weight distribution PBD(series C) was tried instead of unimodal one. Particle size distribution obtained was the abnormal distribution in series B and shifted distribution to the large particle size in series A. But series C gave us usual Gaussian distributions. Heterogeneous adding of PS had relatively high gloss and impact resistance to normal HIPS(A-1) sample, which was shown bimodal distribution HIPS, although homogeneous adding of PS had high impact resistance and low gloss, which was shown normal distribution HIPS. The tensile properties and dynamic viscosty at the low frequency were largely influenced by adding PS. Therefore, in order to obtain both high gloss and impact resistance, heterogeneous adding PS at shortly after phase inversion is desirable.

서지기타정보

서지기타정보
청구기호 {MCHE 93027
형태사항 vii, 80 p. : 삽도 ; 26 cm
언어 한국어
일반주기 부록 수록
저자명의 영문표기 : Joon-Yong Park
지도교수의 한글표기 : 박오옥
지도교수의 영문표기 : O-Ok Park
학위논문 학위논문(석사) - 한국과학기술원 : 화학공학과,
서지주기 참고문헌 : p. 64-67
주제 Grafting.
Polymerization.
Crosslinking (Polymerization)
그라프트 공중합. --과학기술용어시소러스
중합. --과학기술용어시소러스
가교화. --과학기술용어시소러스
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