In this study, P（St-MAA） seed latex particles were first prepared via soap-free emulsion polymerization of styrene （St） and methacrylic acid （MAA）, then the seed particles were allowed to swell with St at room t...In this study, P（St-MAA） seed latex particles were first prepared via soap-free emulsion polymerization of styrene （St） and methacrylic acid （MAA）, then the seed particles were allowed to swell with St at room temperature, and the P（St-MAA）/P（St- NaSS） core/shell latex particles were then synthesized via seeded emulsion copolymerization of St and sodium styrene sulphonate （NaSS） using AIBN as initiator in the presence of N,N^-methylenebisacrylamide （BAA, water-soluble crosslinker）. Results showed that the polymerization could be carried out smoothly when the ratio of BAA to total monomers was less than 3 mol%, the narrow dispersed P（St-MAA） seed particles with the diameter of 150 nm and the P（St-MAA）/P（St-NaSS） core/shell latexes with the particle size of about 200 nm were synthesized. When the 25/75 mole ratio of NaSS/（St ＋ MAA） and 2 tool% of BAA were used in the seeded emulsion polymerization, the resulted P（St-MAA）/P（St-NaSS） latex product showed a low weight loss after water extraction, and the NaSS unit content in the whole particle and in the shell reached 11.7 mol% and 34.6 mol%, resoectivelv.展开更多
Nanosize styrene-acrylate micro-emulsion was synthesized using semi-continuous seed emulsion polymerization method,with hard monomers of styrene and methyl methacryiate,soft monomer of n-buty1 acryiate,function monome...Nanosize styrene-acrylate micro-emulsion was synthesized using semi-continuous seed emulsion polymerization method,with hard monomers of styrene and methyl methacryiate,soft monomer of n-buty1 acryiate,function monomers of acrylic,α-methyl acrylic acid and N-methyloacry amide,complex emulsifier of SDS and OP-10.The structure of the copolymer was characterized by IR and TEM.The influence of the main factors such as ratio of soft and hard monomers,function monomers,and ratio of an-ionic and non-ionicemulsifiers on properties of emulsion was investigated.The optimal emulsion polymerization conditions were determined.展开更多
文摘In this study, P（St-MAA） seed latex particles were first prepared via soap-free emulsion polymerization of styrene （St） and methacrylic acid （MAA）, then the seed particles were allowed to swell with St at room temperature, and the P（St-MAA）/P（St- NaSS） core/shell latex particles were then synthesized via seeded emulsion copolymerization of St and sodium styrene sulphonate （NaSS） using AIBN as initiator in the presence of N,N^-methylenebisacrylamide （BAA, water-soluble crosslinker）. Results showed that the polymerization could be carried out smoothly when the ratio of BAA to total monomers was less than 3 mol%, the narrow dispersed P（St-MAA） seed particles with the diameter of 150 nm and the P（St-MAA）/P（St-NaSS） core/shell latexes with the particle size of about 200 nm were synthesized. When the 25/75 mole ratio of NaSS/（St ＋ MAA） and 2 tool% of BAA were used in the seeded emulsion polymerization, the resulted P（St-MAA）/P（St-NaSS） latex product showed a low weight loss after water extraction, and the NaSS unit content in the whole particle and in the shell reached 11.7 mol% and 34.6 mol%, resoectivelv.
文摘Nanosize styrene-acrylate micro-emulsion was synthesized using semi-continuous seed emulsion polymerization method,with hard monomers of styrene and methyl methacryiate,soft monomer of n-buty1 acryiate,function monomers of acrylic,α-methyl acrylic acid and N-methyloacry amide,complex emulsifier of SDS and OP-10.The structure of the copolymer was characterized by IR and TEM.The influence of the main factors such as ratio of soft and hard monomers,function monomers,and ratio of an-ionic and non-ionicemulsifiers on properties of emulsion was investigated.The optimal emulsion polymerization conditions were determined.
