论文部分内容阅读
以异佛尔酮二异氰酸酯(IPDI)、磺酸型聚酯二元醇(SDNP)为原料,以季戊四醇三丙烯酸酯(PETA)为羟基功能单体,采用无皂乳液聚合法制备了磺酸型聚氨酯丙烯酸酯乳液(SPUEA)。采用激光散射粒径仪、热重分析仪、力学性能测试和原子力显微镜(AFM)考察了PETA用量对乳液及胶膜性能的影响。结果表明:随着w(PETA)从0.5%增至2%,乳液的粒径从87 nm增至112 nm,胶膜的拉伸强度从8.2 MPa增至11.0 MPa;随着w(PETA)从1%增至2%,热失重为50%时胶膜的分解温度从314.57℃升至330.57℃,AFM分析表明两相相容性良好;在w(PETA)=2%时,胶膜的交联度为84.57%,吸水率为8%,胶膜的综合性能较佳。将SPUEA乳液作为胶粘剂应用后,随着w(PETA)从0.5%增加至2.0%,T-型剥离强度从6.98 N/mm增至11.23 N/mm,且乳液在PVC基材表面润湿性良好。
Using sulfonic acid type polyester diol (SDNP) as raw material and pentaerythritol triacrylate (PETA) as hydroxyl functional monomer, the free radical polymerization of sulfonic acid Polyurethane Acrylate Emulsion (SPUEA). The effects of PETA dosage on the properties of emulsion and film were investigated by laser scattering particle size analyzer, thermogravimetric analyzer, mechanical properties test and atomic force microscopy (AFM). The results show that with the increase of w (PETA) from 0.5% to 2%, the particle size of the emulsion increases from 87 nm to 112 nm, and the tensile strength increases from 8.2 MPa to 11.0 MPa. 1% to 2%, and the decomposition temperature of the film increased from 314.57 ℃ to 330.57 ℃ when the weight loss was 50%. AFM analysis showed that the compatibility of the two phases was good. At w (PETA) = 2% Union degree of 84.57%, water absorption of 8%, the overall performance of the film better. After applying the SPUEA emulsion as an adhesive, the T-peel strength increased from 6.98 N / mm to 11.23 N / mm as the w (PETA) increased from 0.5% to 2.0%, and the wettability of the emulsion on the PVC substrate surface was good .