【摘要】 采用起始应力与平衡应力差值的ｅ￣（－１）倍所对应的时间为硫化天然橡胶的平均松弛时间（τ＿０），适当选取各运动单元的松弛时间．建立了５参数数学模型松弛谱的强度（Ａ＿ｉ）通过多无线性回归法确定。结果表明，回归值与实验值吻合良好，在１３～７１℃，均方根偏差小于１．５０％。更多还原

【Abstract】 The average relaxation time of vulcanized natural rubber(τo) was defined by the initial stress minus minus equilibrium stress multiplied by e-1 The model with five parameters was estabilished after the relaxation time of movement unit was choiced properlyThe intensity of relaxation spectrum(Ai) was determined by multiparameter linear regression. The results showed a good agreement between the calculated data and the experimental curves.The mean square root deviation was less than 1. 50% at l3～71℃.更多还原