Abstract: A statistical theory of reinforcement and its charateristics were derived. The elastic free energy of deformation (ΔFTTT) and the retractive force(τ) for tilled rubber vulcanizates may be greater or small than the corresponding values for rubber vulcanized without carbon black, processed under similar conditions, three methods for the characterization of reinforcement were proposed. They were given in Equations (7) to(13). The effects of carbon black on the mechanical behaviors of SBR and NR vulcarmates were studied through uniaxial, equi-biaxial and unequi-biaxial extensions. Excellent agreement between experimental stress-strain Curves and computations with theoretical equations (3), (4) and(5) derivedfrom our proposed theory of elasticity was obtained. Apparently, the proposed theory served well for the prediction of rubberlike elasticity even at higher strains. Excess elastic free energy of deformation, excess retractive force and reinforcement strength for SBR and NR vulcanizates filled with carbon blacks were calculated with Equations(7),(8), (11)and(12). It was found that the physical and chemical properties of reinforcement increased linearly with increasing weight fraction of carbon black. A correlation between the structural parameters of C and the tensile strength for SBR vulcanizates filled with different grades of carbon blacks was obtained. It was also noted that the tensile strength increased with increasing values of parameters C100 and decreased with increasing values of C200/(C100 + C200).

摘要： 本文从炭黑填充和未填充硫化胶的弹性形变自由能和应力一应变关系式出发,利用两者形变自由能和形变应力的差值法,提出了三种炭黑补强作用的表征方法:多余形变自由能、多余形变应力和模量法,后者能定量地区分物理补强,化学补强和短链补强作用.最后以不同炭黑品种和用量填充硫化的天然胶,合成异戊胶和丁苯胶等的大量应力一应变实验数据验证了炭黑填充硫化胶大形变弹性分子理论、补强作用理论和三种补强作用的表征方法,结果表明在给定品种和用量范围内理论同实验均能较好地符合.并讨论了抗张强度同炭黑品种的依赖性.