【摘要】 以羟乙基纤维素为主要稳定剂制备了聚丙烯酸酯乳液,通过TEM观察乳液乳胶粒的形态,并采用红外光谱分析接枝共聚物的结构,探讨了乳液的电解质稳定性、机械稳定性、冻融稳定性和稀释稳定性以及乳胶膜的吸水和力学性能,并与采用低相对分子质量乳化剂制备的聚丙烯酸酯乳液的相应性能进行了比较.结果表明:以羟乙基纤维素为主要稳定剂制备的聚丙烯酸酯乳液具有空间稳定结构,其电解质稳定性大大优于采用低相对分子质量乳化剂制备的聚丙烯酸酯乳液,乳胶膜的拉伸强度和伸长率也分别由14.6MPa和462.3%提高到17.1MPa和524.6%.更多还原

【Abstract】 Polyacrylate latex was first prepared by using hydroxyethyl cellulose as the chief stabilizer,whose morphology was then observed by TEM,and the structure of the grafting copolymer was confirmed by FTIR spectrum.Moreover,the properties of the latex the—the electrolyte stability,the mechanical stability,the freeze-thaw stability and the dilution stability,and the properties of the latex film—the water absorption and the mechanical property were investigated and compared with those of the latex prepared by the emulsifier with low relative molecular mass.The results indicate that the latex using hydroxyethyl cellulose as the chief stabilizer is sterically stable,and when compared with the latex prepared by the emulsifier with low relative molecular mass,it is of better electrolyte(stabi-)lity as well as larger tensile strength and broken elongation,which increase respectively from 14.6MPa and 462.3% to 17.1MPa and 524.6%.更多还原