Differential scanning calorimetry was used to determine the miscibility behavior for the blends of polymethacrylates(PMA''s) having various alkyl groups with chlorine containing polymers. For the chlorine containing polymers, poly(vinyl chloride) (PVC), chlorinated po1yethylene(CPE) and chlorinated poly(vinyl chloride) (CPVC : 65wt.% and 68wt.% chlorine) were studied. The 1:1 blends of polymethacrylate containing ethyl, n-propyl, i-propyl, n-butyl, i-butyl, s-butyl, n-amyl, n-hexyl, and cyclohexyl group with PVC and CPVC were found miscible. The 1 : 1 blend of poly(methyl methacrylate) with PVC was found miscible. The 1 : 1 blend of poly(cyclohexyl methacrylate) with CPE was also miscible. It was found that the following blend were immiscible ; 1 : 1 blend of poly(methyl methacrylate) with CPVC, 1 : 1 blend of polymethacrylates containing glycidyl, 2-hydroxypropyl, t-butyl and phenyl group with PVC, CPE, and CPVC and 1 : 1 blends of polymethacrylates containing methyl, ethyl, n-propyl, i-propyl, n-butyl, i-butyl, s-butyl, and n-amyl group with CPE. In order to explain the miscibility behavior of the blends, the concept of the specific intermolecular interaction (SIMI) between two components was used. It was concluded that the miscibility window depends not only on the steric effect of the substituent group in PMA''s but also on the chlorine content and the conformation of chlorinated polymer.

치환기가 다른 14종의 폴리메타크릴레이트와 폴리비닐클로라이드(PVC), 염소화된 폴리에틸렌(CPE), 염소화된 폴리비닐클로라이드 (C-PVC : 염소함량 65 및 68%)와의 블렌드에 대한 상용성을 시차주사열량분석을 이용해서 연구하였다. 폴리메틸메타크릴레이트와 PVC 1 : 1 블렌드 및 폴리에틴메타크릴레이트, 폴리n-프로필메타크릴레이트. 폴리이소프로필메타크릴레이트. 폴리n-부틸메타크릴레이트. 폴리이소부틸메타크릴레이트, 폴리s-부틸메타크릴레이트, 폴리n-아밀메타크릴레이트, 폴리n-헥실메타크릴레이트, 폴리시클로헥실메타크릴레이트와 PVC 및 CPVC와의 1 : 1 블렌드와 폴리시클로헥실메타크릴레이트와 1 : 1 CPE와의 1 : 1 블렌드는 상용성이 있다는 것을 알았다. 폰리메틱메타크릴레이트와 CPVC 1 : 1 블렌드계는 상용성이 없었다. 폴리글리시딜메타크릴레이트, 폴리히드록시프로필메타크릴레이트, 폴 리 t-부틸메타크릴레이트, 폴리페닐메타크릴레이트와 PVC, CPE 및 CPVC와의 블렌드와 폴리메틸메타크릴레이트, 폴리에틴메타크릴레이트, 폴리n-프로필메타크릴레이트, 폴리s-부틸메타크릴레이트, 폴리n-아밀메타크릴레이트와 CPE와의 1 : 1 블렌드는 상용성이 없었다. 블렌드의 상용성은 성분들 간의 분자간 상호작용 (SIMI : specific intermolecular interaction)의 개념을 이용하여 설명하였는데, 폴리메타크릴레이트에서의 치환기의 입체효과 뿐만 아니라 염소를 포함하고 있는 고분자들의 염소 함량 및 입체형태에도 크게 의존함을 알았다.

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