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本文提出一种表征超拉伸高聚物的拉伸模量新方法,从应力诱导结晶理论出发,推出了超拉伸高聚物的弹性模量同其起始结构和成型工艺条件间的定量关系式。当引入等速拉伸和起始分子量分布按Schultz-Flory 分布后,便得到其拉伸模量同起始数均分子量、超拉伸比、拉伸速率和试样长径比等间的定量关系式。采用该关系式处理了大量的实验数据,均得到了预期的直线。当引入超拉伸比和起始分子量趋近于无穷大后,就得到了预期的理论模量。
In this paper, a new method to characterize the tensile modulus of hyper-stretched polymers is proposed. Based on the stress-induced crystallization theory, the elastic modulus of super-stretched polymers is deduced from the initial structure and the molding process conditions Relationship. When the introduction of constant velocity and initial molecular weight distribution by Schultz-Flory distribution, we get the tensile modulus and the initial number average molecular weight, the ratio of stretching, stretching rate and the ratio between the length of the sample quantitative Relationship. Using this relational formula, we deal with a large amount of experimental data and get the expected straight line. The expected theoretical modulus is obtained when the hyper-stretching ratio is introduced and the starting molecular weight approaches infinity.