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使用差示扫描量热仪(DSC)研究了纯TPI粉末与SBR/TPI并用胶的结晶特性。结果表明,TPI粉末的第1次升温曲线上,β晶体的熔融温度随升温速率的增大逐渐提高,α晶体熔融峰高于β晶体;消除热历史后,β晶体熔融峰高于α晶体,且α晶体随着升温速率的提高逐渐消失;与第1次测试结果相比,第2次升温测得的结晶度呈下降趋势。冷冻作用能够稍微增大未填充SBR/TPI并用胶的结晶度。升温速率对未填充SBR/TPI并用胶晶体熔融峰的峰形分辨率有较大影响。随着TPI用量的增大,未填充并用胶及其硫化胶的结晶熔融焓均增大。填充炭黑后,SBR/TPI并用胶及其硫化胶都比未填充时的峰形钝化变宽。
The crystallization behavior of the pure TPI powder and the SBR / TPI colloidal gum was investigated by differential scanning calorimeter (DSC). The results show that the melting temperature of β crystal gradually increases with the increase of heating rate and the melting point of α crystal is higher than that of β crystal on the first heating curve of TPI powder. The melting peak of β crystal is higher than that of α crystal after eliminating the heat history, And the α crystal gradually disappeared with the increase of the heating rate. Compared with the first test, the crystallinity of the second temperature showed a decreasing trend. Freezing can slightly increase the crystallinity of unfilled SBR / TPI and gums. The rate of heating has a greater effect on the unfilled SBR / TPI and the peak shape resolution of the gel crystal melting peak. With the increase of the amount of TPI, the enthalpy of crystal melting of unfilled and vulcanizates increased. After filled with carbon black, the SBR / TPI and its vulcanizates become broader than the peak shape without passivation.