摘要
以八甲基环四硅氧烷（D4）和1,3-二乙烯基-1,1,3,3-四甲基二硅氧烷（DVMS）为原料,三氟甲基磺酸为催化剂,通过阳离子开环聚合合成双端乙烯基聚硅氧烷（di Vi-PDMS）,并以其改性聚丙烯酸酯,用于涂料印花。研究了催化剂用量、反应温度和反应时间对有机硅单体总转化率和合成产物di Vi-PDMS双键封端率的影响,并对di Vi-PDMS结构和相对分子质量进行表征,测定di Vi-PDMS改性聚丙烯酸酯胶膜及涂料的印花性能。结果表明：当催化剂用量0.15%,反应温度70℃,反应时间6 h,有机硅单体总转化率达91%;改变n（D4）∶n（DVMS）,可合成出相对分子质量为2 000~20 000的di Vi-PDMS;di Vi-PDMS改性聚丙烯酸酯胶膜水接触角为98.50°,吸水率为7.39%,断裂延伸率、断裂强度分别为1 160%、2.65 MPa;其印花织物的耐干/湿摩擦色牢度达4级,手感柔软。
α,ω-bis（vinyl）polydimethylsiloxane（di Vi-PDMS） was synthesized by cationic ring-opening polymerization of octamethyl cyclotetrasiloxane（D4） and 1,3-divinyl-1,1,3,3-tetramethyldisiloxane（DVMS） with trifluoromethanesulfonic acid as catalyst, then polyacrylate was modified with di Vi-PDMS and applied for pigment printing. The influences of the dosage of catalyst, reaction temperature and reaction time on the conversion rate of organosilicone monomers and vinyl terminated rate of di Vi-PDMS were studied. The structure and the relative molecular weight of di Vi-PDMS were characterized, the film properties and pigment printing performance of di Vi-PDMS modified with polyacrylate were measured. The results showed that the optimal conditions of di Vi-PDMS preparation were that the amount of catalyst was 0.15%, reaction temperature was70 ℃ and reaction time was 6 h. Under these optimal conditions, the conversion rate could reach 91%. By changing the molar ratio of D4 and DVMS, di Vi-PDMS of relative molecular weight between 2 000 and 20 000 could be synthesized. The water contact angle and water absorption of modified polyacrylate film was 98.50°and 7.39%. The elongation at break and breaking strength of modified polyacrylate film was 1 160% and 2.65 MPa, respectively. The color fastness to dry and wet rubbing of printed fabric could both reach grade 4, and the handle of printed fabric was soft.
出处
《印染助剂》
CAS
北大核心
2016年第2期22-26,共5页
Textile Auxiliaries
关键词
聚硅氧烷
阳离子开环聚合
聚丙烯酸酯
涂料印花
polysiloxane
cationic ring-opening polymerization
polyacrylate
pigment printing
