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- W2364262204 abstract "Polysiloxane emulsions were prepared by using octamethylcyclotetrasiloxane as monomer,blended surfactant composed of octadecyltrimethylammonium chloride(OTAC) and ethoxylated iso-tridecanol(1307) as emulsifier and KOH as catalyst.Three emulsification methods:high pressure homogenizer,ultrasonic treatment and high speed shearing were carried out to compare the result in aspect of light transmittance,electric conductance,viscosity and storage stability of the emulsion.Effects of mass ratio of the surfactant constituents in the emulsifying agent,dosage of blend emulsifying agent,dosage of KOH catalyst,as well as the reaction temperature on stability of the emulsion and polymerization kinetics were investigated.Results showed that using 30 MPa high pressure homogenizer will result-in best emulsion stability as compared with other methods.When m(OTCA)∶ m(1307)=1∶ 1,the emulsion stability is rather good.Following the increase of emulsifying agent dosage,the fraction of gel content in the emulsion is reduced,and the stability of the emulsion is upgraded.Under the condition as m(OTCA)∶ m(1307)=1∶ 1,the apparent reaction order is 0.16.When the mass ratio of the blend emulsifier is 3%,the apparent reaction order is 0.21.The apparent reaction order of KOH catalyst is 0.57,and its apparent activation energy is 42.66 kJ·mol-1." @default.
- W2364262204 created "2016-06-24" @default.
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- W2364262204 date "2012-01-01" @default.
- W2364262204 modified "2023-09-26" @default.
- W2364262204 title "Study of cationic ring-opening emulsion polymerization of octamethylcyclotetrasiloxane" @default.
- W2364262204 hasPublicationYear "2012" @default.
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