| Engineering plastics are those special polymers with excellent properties, which can be used as constructional materials, even in trenchant chemical and physical circumstance. Compared with PA, PC, POM, PBT/PET and modified PPO, some special engineering plastics such as PEN [poly(arylene ether nitriles)] and PPS[poly(phenylene sulfide)] present better integrated properties and usually be used in special purpose.In this paper, two kinds of heat-resistant engineering plastics PEN and PPS were chosen to be investigated, aiming at exploring the possible pathways to improve the processing and other properties. PEN is one of representative of polyether, which is a typical semi-crystalline polymer of perfect construction and usually showing nice heat-resistant and heat stability due to the rigid aryl group in main chain and nitrile group in side chain. Additionally, PEN has a low Tg than that of PEK, because of its flexibility by those ether bond in main chain. Therefore, it has extensive foreground in use of specialty engineering material due to those perfect properties. PPS is one of representative of polyaryl sulfide, which shows excellent properties like PEN. It can machine shaping through many ways, and also can use to precision finishing. But both of them were difficult to process, because the melt point and melt viscosity of PEN are very high while the melt viscosity of PPS is very low. As a result, the suitable condition and parameters of processing are difficult to find.However, PEN is easy to solve in DMF and is facile to prepare films. In order to functionalize PEN films, we used rare earth and BaTiO3 as raw material to modify PEN film, which could make its use as functional material extend. The films were characterized by IR, STA, Fluorescence spectrum, XRD and high resistance meter. Moreover, PPS was modified through blending with PA6, PC, ABS and PEN, then the properties studies were carried out.1. Studies on modification and properties of PEN film... |
PDF Full Text Request