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이승진(Seung Jin Lee),김현교(Hyun Kyo Kim),박환만(Hwan Man Park),조원제(Won Jei Cho),하창식(Chang Sik Ha) 한국고무학회 1999 엘라스토머 및 콤포지트 Vol.34 No.1
N/A The mechanical, electrical, and thermal properties of polyamide-modified poly (vinyl chloride)(PVC)-sol was investigated. PVC-sol was plasticized with dioctyl phthalate (DOP). In this work, the effects of the addition of polyamide on the properties of PVC-sol sealants were investigated. Two kinds of polyamide resins having different amine value were used. It was found that the properties of the PVC-sol sealants were significantly affected by the contents and types of the added polyamide resins. The PVC-sol sealants modified with polyamide A (low amine value) showed higher tensile properties than those modified with polyamide B(high amine value) did, and thermal stability of the sealants showed nearly the same trends. The tensile strength of sealants were decreased with increasing the CaCO₃ contents. The dielectric constant were not strongly dependent on the polyamide types and contents.
이승진(Seung Jin Lee),김현교(Hyun Kyo Kim),박환만(Hwan Man Park),조원제(Won Jei Cho),하창식(Chang Sik Ha) 한국고무학회 1999 엘라스토머 및 콤포지트 Vol.34 No.3
N/A In this work, the effects of the addition of epoxy on the properties of PVC-sol sealants were investigated. PVC-sol was plasticized with dioctyl phthalates(DOP). Two kinds of epoxy resins having different epoxy equivalent weight (E.E.W.) were used. It was found that the properties of the PVC-sol sealants were significantly affected by the contents and types of the added epoxy resins. The viscosity behaviors of the epoxy-modified sealants, in the case of epoxy A addition, the viscosity was decreased with increasing the epoxy contents, but in the case of CaCO₃ addition, the viscosity was increased with increasing the CaCO₃ contents. The viscosity of epoxy modified sealants aged at 45℃ waterbath was decreased with increasing epoxy contents, since the epoxy acted on the sealants as a stabilizer. The thermal stability of the PVC-sol sealants was slightly improved by adding epoxy. The tensile strength and elongation of sealants modified with epoxy A(two functionalities of epoxy) were increased with increasing the epoxy contents up to a certain epoxy contents but was decreased with further increasing the epoxy contents. In the case of CaCO₃ addition, the tensile strength of sealants were decreased with increasing the CaCO₃ contents. In view of the electrical properties, such as tan δ(0.1±0.04) and ε_r(0.5±0.04), it was found that the epoxy modified sealants were as good as insulators.