摘要
以自制的星形超支化聚合物B–PE10P为改性剂对水性丙烯酸酯(WA)树脂分别进行物理共混改性和化学接枝改性,制备了B–PE10P/WA和B–PE10P–WA水性涂料,测试了涂膜性能。结果表明,与未改性的丙烯酸涂料漆膜相比,物理共混改性得到的B–PE10P/WA涂料,其漆膜耐水、耐碱、耐盐水和耐紫外光老化性能等显著提高;而化学改性得到的B–PE10P–WA涂料,其漆膜光泽度和耐久性都较差。B–PE10P/WA固化漆膜的傅立叶变换红外光谱(FT-IR)、差示扫描量热(DSC)和热重(TG)分析表明,B–PE10P可提高丙烯酸酯树脂的交联反应程度,使漆膜具有更高的玻璃化转变温度以及更好的物理机械性能、耐久性能和热稳定性。
Two water-based coatings, i.e. B-PEIOP/WA and B-PE 10P-WA, were prepared from waterborne acrylate （WA） resin with home-made star-shaped and hyperbranched polyester of B-PE10P as modifier by physical blending and chemical grafting, respectively. The cured film performances were tested. The results demonstrated that in comparison with the unmodified acrylic coating film, the B-PE10P/WA coating film obtained by physical blending modification has much better resistance to water, alkali, salt water, and ultraviolet aging, but the B-PE10P-WA coating filmobtained by chemical modification has worse luster and durability. The results of Fourier transform infrared （FT-IR） spectroscopy, differential scanning calorimetry （DSC）, and thermogravimetric （TG） analysis on cured B-PE10P/WA film indicated that B-PE10P can increase the extent of crosslinking reaction of acrylate resin, hence the cured film has higher glass transition temperature, better physical- mechanical properties, durability, and thermal stability.
出处
《电镀与涂饰》
CAS
CSCD
北大核心
2012年第9期55-58,共4页
Electroplating & Finishing
基金
广东省重大科技专项计划项目(2009A080208004)
关键词
水性涂料
星形超支化聚合物
改性
丙烯酸酯树脂
waterborne coating
star-shaped and hyperbranchedpolyester
modification
acrylate resin
