A novel compound diethyl acetylphosphonate has been explored as efficient additive in iron based catalyst for stereo-polymerization of 1,3-butadiene to afford high crystalline 1,2-syndiotactic polybutadiene. Excellent 1,2 selectivity in range of 91.0–98.4% with controllable crystallinity has been achieved at high catalytic efficiency in wide ranges of cocatalyst and additive feeding as well as at large temperature scope. As reinforcing agent, two crystalline polymers differing in crystallinity 4.4% and 51.9% are blended and co-cured with cis-1,4 polybutadiene (PB) with 10 wt-%, providing samples PB1 and PB2, respectively. SEM from the sample fracturesurface shows the s-PBD particles are intimately mixed and homogeneously dispersed in PB matrix due to the strong interfacial interaction. The analysis of the mechanical properties of sample PB2 finds the tensile strength of increases by one-fold and the elongation at break increases by two-fold when head to head comparison to those of the CB filled PB, while the shear modulus G′ and loss factor (tan δ) are as good as those charged with CB. These results highlight the role of s-PBD as reinforcing agent of PB rubber, yielding high performance rubber materials with improved mechanical properties.

已经研究了新型化合物乙酰基膦酸二乙酯作为铁基催化剂中的有效添加剂，用于1,3-丁二烯的立体聚合，以提供高结晶度的1,2-间同立构的聚丁二烯。在多种助催化剂和添加剂进料以及大温度范围内的高催化效率下，在91.0–98.4％的范围内具有出色的1,2选择率和可控制的结晶度。作为增强剂，将两种结晶度分别为4.4％和51.9％的结晶聚合物共混并与10 wt％的顺式-1,4聚丁二烯（PB）共固化，分别提供样品PB1和PB2。样品断口表面的SEM显示s-由于强烈的界面相互作用，PBD颗粒紧密混合并均匀地分散在PB基质中。样品PB2的机械性能分析发现，与CB填充的PB相比，拉伸强度增加了1倍，断裂伸长率增加了2倍，而剪切模量G'和损耗因素（谭 δ）都好，因为那些指控CB。这些结果突出了s- PBD作为PB橡胶的增强剂的作用，产生了具有改善的机械性能的高性能橡胶材料。