摘要
以聚乙二醇、二羟甲基丙酸(DMPA)、甲苯二异氰酸酯(TDI)为基本原料,合成了水性聚氨酯(PU)预聚体,并在此基础上加入适量丙烯酸,制备出丙烯酸改性水性聚氨酯(PUA)。对所得产物进行了表征与测试,同时,探讨了丙烯酸含量对水性聚氨酯性能的影响。研究结果表明:丙烯酸成功地接枝到水性聚氨酯分子链上,改性后的水性聚氨酯的耐热性能提高;随着丙烯酸体积分数的增加,PUA的断裂伸长率减小,拉伸强度和吸水率显著提高。
Abstract： polyethylene glycol, 2,2-dimethylol propionic acid （DMPA）, 2,4-diisocyanatotoluene （TDI） and acrylic acid as materials. Characterization and testing of the products and the influences of acrylic acid on the performance of PU were discussed. The results of Fouriertransform infrared spectroscopy demonstrate that acrylic acid is chemically tethered onto the molecular chains of PU. The PUA has better heat resistance property compared with PU by thermogravimetric analysis. With the increasing of the acrylic acid content, elongation at break of PUA decreases, and tensile strength and water absorption increase obviously.
出处
《包装学报》
2013年第3期16-19,共4页
Packaging Journal
关键词
水性聚氨酯
聚乙二醇
丙烯酸
改性
water soluble polyurethane
polyethylene glycol
acrylic acid
modified
