摘要
以甲苯二异氰酸酯(TDI)和聚乙二醇(PEG)为原料,选用2,2-二羟甲基丁酸(DMBA)为扩链剂合成水性聚氨酯(WPU),通过甲基丙烯酸羟乙酯(HEMA)对水性聚氨酯进行封端,采用自乳化法,制备了HEMA改性水性聚氨酯乳液(HEMA-WPU)。通过红外、核磁和热重法(TG)分别表征了WPU和HEMA-WPU的分子结构及其热分解行为。结果表明,与WPU相比,HEMA-WPU的耐热性能明显提高,用该乳液上胶处理后的碳纤维/环氧树脂复合材料的层间剪切强度(ILSS)与未上胶的样品相比提高了7.5%,达到64.5MPa。
Waterborne polyurethane （WPU） was prepared by using toluene diisocynate （TDI） and polyethylene glycol （PEG） as raw materials, and 2,2-dimethylolbutyric acid as chain extender. Hydroxyethyl methacrylate （HEMA） was used to terminate WPU. The self-emulsifying method was adopted to prepare HEMA-grafted WPU （HEMA-WPU） emulsion. Fourier transform infrared （FT-IR） and nuclear magnetic resonance （NMR） and thermogravimetric analysis （TG） were used to characterize the molecular structure and thermal endurance of HEMA-WPU. Compared with WPU, the thermal endurance of HEMA-WPU was raised obviously. The inter-laminar shear strength （ILSS） of carbon fiber/ epoxy resin composite samples after sizing by the prepared emulsion was raised by 7.5%, reaching 64. 5 MPa, compared with the un-sized samples.
出处
《化工学报》
EI
CAS
CSCD
北大核心
2013年第6期2257-2263,共7页
CIESC Journal
关键词
甲基丙烯酸羟乙酯
改性
水性聚氨酯
耐热性
碳纤维上胶剂
hydroxyethyl methacrylate （HEMA）
modification
waterborne polyurethane （WPU）
thermal endurance
carbon fiber sizing agent
