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공업용 물유리를 이용한 폴리실록산의 합성
Synthesis of Polysiloxane from Industrial Water Glass
HWAHAK KONGHAK, June 1992, 30(3), 277-284(8), NONE
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Abstract
공업용 물유리를 황산으로서 silicic acid를 제조하고 제조된 silicic acid를 tetrahydrofuran(THF)으로 추출하여 trimethylchlorosilane(TMCS),dimethyldichlorosilane(DMCS),dichloromethylsilane(DCMS),methyl-trichlorosilane(MTCS)을 각각 반응시켜 생성된 4가지 합성물의 구조와 물성을 조사한 결과 TMCS에서는 선형의 trimethylchlorosilane이 DMDCS애서는 2차원의 dimethylpolysiloxane이 DCMS에서는 H계 2차원 methylpolysi-loxane이 MTCS에서는 3차원 구조의 methylpolysiloxane이 합성되었으며 그리고 이 때 trimethylpolysiloxan은 THF와 CCl4 등에 가용이나 dimethylpolysilloxane 혹은 H계 methylpolysiloxane은 난용, methylpolysiloxane은 불용이었다. 가용인 trimethylpolysiloxane의 분자량은 약 13,000이었으며 각 폴리머의 융점은 약 150℃, 분해온도 약 400℃인 무정형 배색 과립상 polysiloxand이 합성됨을 알았다,
The structure and characteristics of the silylates prepared from industrial water glass were stu-died. The structures of the silylates were apparently showed differences by the silylating agents : linear tri-methylpolysiloxane was produced from trimethylchlorosilane, two-dimensional dimethylpolysiloxane from di-methyldilchlorosilane, two-dimensional H-methylpolysiloxane from dichloromethylsilane, and finally three-di-mensional methylpolysiloxane from methyltrichlorosilane. Trimethylpolysiloxane was soluble in tetrahy-drofurane or tetrachlorocarbon, but dimethylpolysiloxane and H-methylpolysiloxane slightly soluble in these solvents, and methylpolysiloxane was not slouble. Each polymer, white amorphous granule has about 13,000molecular weight, about melting point 150℃, and abuot 400℃ decomposition temperature.
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