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- W2373694143 abstract "The polymethylphenylcyclosiloxanes were prepared by cohydrolysis-condensation, catalytic alkaline splitting process etc.based on methylphenyldichlorosilane containing phenyltrichlorosilane from thermal condensation process as raw materials.The factors influencing on the preparation techniques of methylphenylcyclosiloxanes such as the components of feedstock,hydrolysis temperature,molar ratio of H_2O to Si-Cl bonds and dosage of catalyst were investigated,and the optimized technique parameters for cohydrolysis were obtained.The optimum hydrolysis conditions were as follows:the reaction temperature was 50～70℃,reaction time was 2～4h,the molar ratio of H_2O to Si-Cl bonds was 7～10.And the optimum alkaline splitting conditions were obtained in the presence of LiOH as catalyst with its mass fraction in the range of 1.5%.The yield of methylphenylcyclosiloxanes was 97.0% and the purity was 99.5% maximally.The obtained methylphenylcyclosiloxanes were characterized by NMR and GC-MS." @default.
- W2373694143 created "2016-06-24" @default.
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- W2373694143 date "2008-01-01" @default.
- W2373694143 modified "2023-09-27" @default.
- W2373694143 title "Study on the Preparation Techniques of Methylphenylcyclosiloxanes" @default.
- W2373694143 hasPublicationYear "2008" @default.
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