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Language: korean

Conflict of Interest: In relation to this article, we declare that there is no conflict of interest.

Publication history: Received December 14, 2011
Accepted February 26, 2012

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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저수축제 폴리스틸렌과 불포화 폴리에스터 수지를 사용한 Sheet Molding Compound 제조 및 특성

Preparation and Characteristic of Sheet Molding Compound using Unsaturated Polyester Resin with Low Profile Agent of Polystyrene

배기붕 이상구¹ 윤홍진² 이종대^2†

Gi Boong Bae Sang Goo Lee¹ Hong Jin Yoon² Jong Dae Lee^2†

(주) 에스켐, 363-942 충북 청원군 부용면 금호리 256 ¹한국화학연구원 그린화학연구단, 305-343 대전광역시 유성구 장동 100 ²충북대학교 화학공학과, 361-763 충북 청주시 흥덕구 성봉로 410

Soft Chemical Co. LTD., 256 Geumho-ri, Buyong-myeon, Cheongwon-gun, Chungbuk 363-942, Korea ¹Division of Green Chemistry, Korea Research Institute of Chemical Technology, 100 Jang-dong, Yuseong-gu, Daejeon 305-343, Korea ²Department of Chemical Engineering, Chungbuk National University, 410 Sungbong-ro, Heungduk-gu Cheongju-si, Chungbuk 361-763, Korea

jdlee@chungbuk.ac.kr

Korean Chemical Engineering Research, June 2012, 50(3), 588-593(6), NONE Epub 5 June 2012

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Abstract

불포화 폴리에스터(unsaturated polyester, UP)와 저수축제(low profile agent, LPA), 폴리스틸렌(polystyrene, PS)과의 compatibility가 불포화 폴리에스터와 저수축제의 비율, 혼합시간, 혼합온도 그리고 추가로 투입되는 불포화 폴리에스터 수지량과 같은 다양한 조건하에서 확인되었다. 1단계로 1700 rpm의 교반속도에서 제조된 수지 혼합액의 경우, 불포화 폴리에스터 수지(unsaturated polyester resin, UPR) 투입량 25 g, 약 30 oC의 반응온도에서 상대적으로 작은 입자크기 및 상분리율을 나타내었다. 2단계 수지 혼합액의 경우, 2차로 투입된 45 g의 불포화 폴리에스터 수지 혼합액에서_x000D_ 향상된 compatibility를 보였다. 이러한 결과는 혼합조건이 불포화 폴리에스터 수지와 저수축제 혼합액의 compatibility 에 중요한 역할을 한다는 것을 의미한다. 또한, 상기조건을 통해 제조된 sheet molding compound (SMC)를 사용해서 만든 샘플은 흡수율, 수축율 및 광택도에서 향상된 결과를 나타내었다.

Compatibility of unsaturated polyester (UP) and low profile agent (LPA) of polystyrene (PS) have been investigated under various mixing conditions such as the ratio of UP and LPA, mixing time, mixing temperature, and input amount of 2nd UP. It was possible to obtain mixture with small particle size and low phase separation in condition of 35 g of LPA, 25 g of 1st UP input, 5 min of mixing time, 1700 rpm of mixing speed, and 45 g of 2nd UP input. It was found that compatibility of UP and LPA was very sensitive to mixing conditions. In addition, molded sample using sheet_x000D_ molding compound prepared by stable mixing condition appeared good properties such as low water adsorption, low shrinkage, and high gloss.

Keywords

Unsaturated Polyester Resin Low Profile Agent Compatibility Shrinkage

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