The tensile strength of elastomers
The tensile strength of elastomers
复制标题
弹性体的拉伸强度
DOI：
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发表时间：
1955
期刊：
影响因子：
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通讯作者：
S. R. Darin
中科院分区：
文献类型：
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作者：
G. R. Taylor;S. R. Darin
二甲基二羧酸十亚甲基硫化胶、50℃聚丁二烯、5℃聚丁二烯和天然橡胶的抗拉强度被测定为温度和/或交联度的函数。提出了一种能充分描述交联程度对非晶聚合物抗拉强度影响的理论。然后对非晶材料强度的理论表达式进行修改，以包括结晶的影响。可结晶弹性体（包括非晶态弹性体作为特殊情况）抗拉强度的完整表达式为：
The tensile strength of decamethylene dismethylazodicarboxylate vulcanizates of GR-S, 50°C. polybutadiene, 5°C. polybutadiene, and natural rubber has been determined as a function of temperature and/or the degree of crosslinking. A theory of tensile strength of amorphous polymers which adequately describes the effect of the degree of crosslinking on strength is proposed. The theoretical expression for the strength of amorphous materials is then modified to include the effect of crystallization. The complete expression for the tensile strength of crystallizable elastomers, which includes amorphous elastomers as a special case, is:
where ω0 = 1 − (1 + δ2λ3)−1/2, fc = volume fraction crystallinity, M = primary molecular weight, Mc = molecular weight per crosslink in the uncrystallized polymer, λ = extension ratio at break, and δ, K = parameters. The theory is shown to be good for GR-S and semiquantitatively correct for a crystallizable polymer, 5°C. polybutadiene.