Synthesis and characterisation of silicone polyacrylate latex emulsified by green surfactants

摘要

Abstract: The modified latex was successfully prepared by semi-continuous seeded emulsion polymerisation with a green mixed emulsifier of polyether nonions with double bonds(AE-100)and alkyl alcohol polyether sodium sulphate anionic emulsifier(ES-430S).The mixed monomers of MMA,BA and vinyl triethoxysilane(VETS)were initiated with potassium persulphate(KPS).The structure and properties of the resultant latex were characterised by Fourier transform infrared spectroscopy(FTIR),thermogravimetric analysis(TGA)differential scanning calorimetry(DSC)and contact angle(CA).The conditions for preparing the latex were instigated in detail.Results indicate that the optimal conditions of preparing the latex are as follows: the amount of mixed emulsifiers is 6.0%;the optimum mass ratio of AE-100 to ES-430S is 1:1.5;the amount of initiator is 0.7%;the mass rate of main monomers of MMA: BA = 1:1 and amount of VTES is 6.0%.In addition,the resultant latex shows good thermal stability and hydrophobicity.