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- W2365379497 abstract "Azo initiator 2,2'-azobis(isobutyramidine)dihydrochloride(AIBA)can be stably absorbed onto TiO_2 particles by electrostatic action.The adsorbed AIBA can initiate the in situ anchoring of butyl acrylate from TiO_2 particles surface,and thus poly(butyl acrylate)/TiO_2 composite latex particles(PBA/TiO_2)were prepared via in situ emulsion polymerization.It was found from centrifugation experiment and UV measurement that there was an upper limit of AIBA adsorbed on TiO_2 particles surface,and its value was 0.084 mmol/g(relatived to the amount of TiO_2)in pH=10 system.The adsorption of AIBA played a more important role both in polymerization behavior and in polymerization product.Only when the addition amount of AIBA was slightly less than the upper adsorption limit,the inhibition period was shorter,the polymerization rate and the monomer conversion were higher and the reaction stability were and the product stability were perfect.It was further proved by thermogravimetric analysis(TGA)and infrared spectrometry(FTIR)with soxhlet extraction experiment of PBA/TiO_2 composite particles that 13.5% non-extraction poly(butyl acrylate)were anchored on TiO_2 particles surface.It was also found from dynamic light scattering(DLS)that part of TiO_2 soft-aggregation had been disaggregated stably,and both the dispersion and dispersion stability of TiO_2 particles in latex can be significantly improved because of the anchoring modification of TiO_2 by PBA.This action resulted from anchoring modification,in essence,was different from the reversible disaggregation action of ultrasonication treatment onto TiO_2 soft-aggregation.Thus,this study is favourable for maintaining the good dispersion and dispersion stability of nanoscale inorganic particles in organic matrix during its application in the fields of coatings,painting,plastics,rubber,textile,and cosmetic." @default.
- W2365379497 created "2016-06-24" @default.
- W2365379497 creator A5070974686 @default.
- W2365379497 date "2009-01-01" @default.
- W2365379497 modified "2023-09-26" @default.
- W2365379497 title "ELECTROSTATIC ABSORPTION OF AZO INITIATOR ONTO TiO_2 PARTICLES AND in situ ANCHORING POLYMERIZATION OF BUTYL ACRYLATE FROM MODIFIED TiO_2" @default.
- W2365379497 hasPublicationYear "2009" @default.
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