Nonisothermal crystallization behavior of nylon 1212/nylon 6 blends

Nonisothermal crystallization behavior of nylon 6, nylon 1212 and their blends using maleated SEBS as compatibilizers were studied by differential. scanning calorimetry (DSC). The results showed that the processing history had a great influence on the crystallization and melt behavior of nylons. The extruded nylons showed improved crystallization temperature (T-c) and multiple melting phenomena due to the stress induced molecular orientation. In blends, the heterogeneous crystallization of nylon 1212 on the interface of nylon 1212 and nylon 6 occurred. Therefore, the T-c of nylon 1212 was increased. With the addition of maleated SEBS, the formation of grafted copolymers between nylon 1212 and maleated SEBS restrained the movement of molecules and decreased the T-c of nylon 1212. The melt temperature (T-m) of nylon 1212 was declined and the upper melting peak disappeared with increase of maleated SEBS in blends. However, the melt behavior of nylon 6 in blends was nearly unchanged.