配位交联的NBR/PVC合金的制备及表征

橡胶通常是通过共价键将线型高分子交联成三维网状结构，而交联过的橡胶不溶不熔，很难再生利用，对环境造成严重污染，为了解决橡胶材料再生利用问题，许多人尝试将一些非共价键用于橡胶的交联，如热塑性弹性体(物理交联)、离子弹性体Ⅲ及通过氢键交联的橡胶，然而由于上述非共价键作用较弱，导致材料力学性能较差及高温使用性能下降，配位键是所有非共价键中最强的键，

Preparation and Characterization of Novel NBR/PVC Alloy Crosslinked by Coordinate Bonds

The most common way of rubbers for obtaining high performance is vulcanization, by which the linear macromolecules are crosslinked into three-dimensional networks. The rubbers vulcanized by covalent bonds are serious pollutants. There has been an increasing interest in the novel rubbers crosslinked by supramolecular interactions such as hydrogen bonds and ionic bonds because of the supramolecular interactions are reversible and the crosslinked materials are likely to be recycled. In this paper, a series of novel NBR/PVC materials crosslinked with CuSO_4 by coordinate bonds were prepared for the first time, and the produced materials have excellent mechanical properties. In this system, the coordinate bonds formed in situ during the heat press process. XPS and SEM results prove that there are really crosslinks by coordinated bonds between the polymers and the CuSO_4 particles. The characterizations of mechanical properties, crosslink densities and the temperature of glass transition all showed that degree of crosslink and the performance of the coordinated materials could be adjusted controllably.