采用硬脂酸、异辛醇以及羟丙基甲基纤维素作为辅助剂制备了快速凝固天然橡胶,并对凝固后天然生胶的结构、加工性能、热稳定性和力学性能进行研究。研究表明快速凝固橡胶的蛋白质含量增加。与乙酸凝固相比,快速凝固天然橡胶具有更高的热稳定性、较低的损耗因子。同时,快速凝固天然橡胶的拉伸强度和撕裂强度相对乙酸凝固天然橡胶分别由18.0 MPa 与28.9 kN·m-1提高到21.1 MPa 和35.5 kN·m-1,交联密度由4.39×105 mol/cm3提高到5.09×105 mol/cm3。
Rapid coagulation natural rubber was prepared by using of stearic acid, 2-ethylhexanol and hydroxypropyl methyl cellulose as auxiliary agents.And the structure,processability,thermal stability and mechani-cal property of the rubber were studied.The protein content of the resulting natural rubber was higher than that of natural rubber coagulated with acetic acid.Results showed that thermal stability was improved and the loss factor was decreased via rapid coagulation method.Comparing with acetic acid coagulation rubber,the tensile strength of the rapid coagulation natural rubber was enhanced from 18.0 MPa to 21.1 MPa,the tear strength was improved from 28.9 kN·m-1 to 35.5 kN·m-1 as well,the crosslinked density was increased from 4.39×10 5 mol/cm3 to 5.09×10 5 mol/cm3 .
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