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Journal of the Korean Chemical Society (JKCS)

ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 19, Number 6
JKCSEZ 19(6)
December 20, 1975 

Polymerization of Methyl Methacrylate Initiated by Cobalt (Ⅱ) Nitrate

질산코발트 (Ⅱ)에 의한 Methyl Methacrylate의 중합
Jang-oo Lee, Dong-ho Lee, Tae-oan Ahn

이장우, 이동호, 안태완
Tetrahydrofuran(THF)중에서 질산코발트(II)를 개시제로 사용하여 methyl methacrylate(MMA)의 중합반응을 연구하였다. 반응속도론적 연구 결과로 다음과 같은 중합속도식을 얻었다. Rp=k [질산코발트(II)]0.5[MMA]1.5. Chelate를 잘 형성하는 옥살산이 중합속도에 미치는 영향을 고려해 보면, 단위체인 MMA가 질산코발트(II)와 배위착물을 형성한다는 것을 추론할 수 있었다. 또 중합계의 겉보기 총 활성화에너지는 14.0kcal/mole이라는 것을 알았다.

The polymerization of methyl methacrylate(MMA) initiated by cobalt (Ⅱ) nitrate in tetrahydrofuran (THF) has been studied. From the results of kinetic studies, the overall polymerization rate (Rp) could be expressed as following; Rp = k[cobalt(Ⅱ) nitrate]0.5[MMA]1.5 By considering the effects of chelating agent on the polymerization rate, it could be assumed that the monomer, MMA might form a coordination complex with cobalt(Ⅱ) nitrate. In the presence of radical inhibitor hydroquinone, the inhibition time was observed. And the apparent overall activation energy was calculated to be 14.0 kcal/mole.

463 - 467
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