화학공학소재연구정보센터
Polymer(Korea), Vol.18, No.4, 632-640, July, 1994
염화비닐리덴을 혼합한 비닐에스테르 수지의 크롬산 용액에 대한 열화 특성
Degradation of Vinylidene Chloride-Mixed Vinylester Resin in Chromic Acid Solution
초록
비닐에스테천수지에 반응성 이중결합과 염소(chlorine)를 포함하고 있는 염화비닐리덴(vinylidene chloride)을 0∼30phr(wt.)로 첨가하여 20% 크롬산 용액에 대한 열화성직을 조사하였다. 침지 초기에는 염화비닐리덴을 첨가한 것이 높은 흡수율을 보여 주었지만 점차 무첨가의 것이 더 높은 흡수율을 보여 주었으며, 열화의 형태는 무첨가의 것은 크랙의 성장속도가 빠르게 나타났고 염화비닐리덴을 첨가한 것은 수포의 성장속도가 빠르게 나타났다. 그리고 초기 굴곡강도와 내약품성의 유지면에서 볼 때 염화비닐리덴을 10phr 이하로 사용하는 것이 효과적이었다.
Vinylester resins were modified with vinylidene chloride in the range of 0∼30phr. Degradation behaviour of modified resins was examined under the condition of 20% chromic acid solution. Modified resins showed higher water absorption ratio than non-modified vinylester resins in the initial periods of immersion, but became lower after 90 days. Modified resins showed raped blister-growth in the course of degradation, on the other hand, non-modified resins showed rapid crack-growth. Blendings with less than 10 phr of vinylidene chloride were more effective in the view of maintenance of the flexural strength and chemical resistant properties.
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