Poly(methyl methacrylate/ethyl acrylate/acrylic acid) hydrosols were prepared by employing soap-free polymerization, and (acrylic acid/butyl acrylate) oligomer was used as the polymeric surfactant. The effect of react...Poly(methyl methacrylate/ethyl acrylate/acrylic acid) hydrosols were prepared by employing soap-free polymerization, and (acrylic acid/butyl acrylate) oligomer was used as the polymeric surfactant. The effect of reaction condition on the morphology and particle size of the hydrosols was investigated. The minimum amount of acrylic acid in the hydrosols is 2%. The maximum weight average molecular weight (M-w) of polymer that assures soap-free emulsion conversion into hydrosol is about 1.2 x 10(5)-1.3 x 10(5). The particle transforming process was investigated, and an obvious change of particle diameter and morphology was observed.展开更多
以甲基丙烯酸月桂酯(LMA)、甲基丙烯酸甲酯(MMA)、甲基丙烯酸十二氟庚酯(G-04)、乙烯基三乙氧基硅烷(KH-151)为反应单体,采用半连续乳液聚合法合成了氟硅改性丙烯酸酯无皂乳液。探讨了4种可聚合乳化剂(A、B、C、D)对所合成氟硅拒水剂拒...以甲基丙烯酸月桂酯(LMA)、甲基丙烯酸甲酯(MMA)、甲基丙烯酸十二氟庚酯(G-04)、乙烯基三乙氧基硅烷(KH-151)为反应单体,采用半连续乳液聚合法合成了氟硅改性丙烯酸酯无皂乳液。探讨了4种可聚合乳化剂(A、B、C、D)对所合成氟硅拒水剂拒水性能的影响,并与采用阴离子型乳化剂制得的拒水剂进行了拒水性能比较。结果表明,与采用阴离子乳化剂合成的拒水剂相比,采用可聚合乳化剂制备的无皂拒水剂的拒水效果更佳;将可聚合乳化剂A、B按质量比2∶1进行复配时,拒水剂的拒水效果最佳;纯棉织物经拒水整理后对水的接触角可达138.6°,静水压可达2.83 k Pa,表现出良好的拒水效果。展开更多
The emulsion of cationic polyacrylamide was prepared by a soap-free polymerization,using water as media,the oligomer that prepared by myself as emulsifier and stabilizer,(NH4)2S2O8 as initiator.The effect of the amoun...The emulsion of cationic polyacrylamide was prepared by a soap-free polymerization,using water as media,the oligomer that prepared by myself as emulsifier and stabilizer,(NH4)2S2O8 as initiator.The effect of the amount of isopropanol,oligomer and the ratio of DMC/AM on the molecular weight of cationic polyacrylamide were all studied.The best amount of isopropanol,oligomer are 25%,20% of the total monomer and the ratio of DMC/AM is 3/7.展开更多
文摘Poly(methyl methacrylate/ethyl acrylate/acrylic acid) hydrosols were prepared by employing soap-free polymerization, and (acrylic acid/butyl acrylate) oligomer was used as the polymeric surfactant. The effect of reaction condition on the morphology and particle size of the hydrosols was investigated. The minimum amount of acrylic acid in the hydrosols is 2%. The maximum weight average molecular weight (M-w) of polymer that assures soap-free emulsion conversion into hydrosol is about 1.2 x 10(5)-1.3 x 10(5). The particle transforming process was investigated, and an obvious change of particle diameter and morphology was observed.
文摘以甲基丙烯酸月桂酯(LMA)、甲基丙烯酸甲酯(MMA)、甲基丙烯酸十二氟庚酯(G-04)、乙烯基三乙氧基硅烷(KH-151)为反应单体,采用半连续乳液聚合法合成了氟硅改性丙烯酸酯无皂乳液。探讨了4种可聚合乳化剂(A、B、C、D)对所合成氟硅拒水剂拒水性能的影响,并与采用阴离子型乳化剂制得的拒水剂进行了拒水性能比较。结果表明,与采用阴离子乳化剂合成的拒水剂相比,采用可聚合乳化剂制备的无皂拒水剂的拒水效果更佳;将可聚合乳化剂A、B按质量比2∶1进行复配时,拒水剂的拒水效果最佳;纯棉织物经拒水整理后对水的接触角可达138.6°,静水压可达2.83 k Pa,表现出良好的拒水效果。
文摘The emulsion of cationic polyacrylamide was prepared by a soap-free polymerization,using water as media,the oligomer that prepared by myself as emulsifier and stabilizer,(NH4)2S2O8 as initiator.The effect of the amount of isopropanol,oligomer and the ratio of DMC/AM on the molecular weight of cationic polyacrylamide were all studied.The best amount of isopropanol,oligomer are 25%,20% of the total monomer and the ratio of DMC/AM is 3/7.
