In-situ Preparation Of PPES/MCPA6and Its Modification To The PPES、PPES/PA6Systems

Poly(Phthalazinone ether sulfone) is well known as a kind of high performance engineering plasticcontaning phthalazinone biphenyl structure, its heat resistance is high, the glass transition temperature(Tg) of PPES as high as305℃. This paper used PPES with good solubility in caprolactam,Polymerization were initiated by chlorine end group of PPES, sodium hydroxide was used as catalyst,then different proportions PPES was added for preparing PPES-b-MCPA6block copolymer.Meanwhile the PPES/MCPA6in-situ composites were prepared by in-situ polymerization. The fouriertransform infrared spectroscopy (FTIR), nuclear magnetic hydrogen spectrum (H NMR), C,N,Selement analysis (CNS), differential scanning calorimetry (DSC), thermogravimetric (TG), dynamicthermal mechanical analyzer (DMA), electronic universal tensile testing machine and scanningelectron microscope (SEM）were detected to estimate the chemical structure, thermal properties,crystalline properties and mechanical properties and fracture properties of the block copolymer.When PPES and PA6two thermodynamic incompatible polymers were blended, it’s necessary toadd the compatilizer. This paper used PPES-b-MCPA6block copolymer as compatibilizer forPPES/PA6systems, by the method of melting blended of different types and different proportion ofPPES-b-MCPA6block copolymer. The rheological properties, the compatibility and mechanicalproperties and fracture damage morphology were studied. The results founded that in PPES/PA6systems, when joined the block copolymer, the dispersion of PPES phase in matrix PA6couldincreased, at the same time the cohesive force between the PPES and PA6interface also increased, themechanical properties could increased18%~22%, The thermal decomposition temperature wereimproved by added copolymerization.PPES had a high melting temperature and high melting viscosity, the crosslinking of PPES wasinduced by processing in high temperature, the PPES-b-MCPA6block copolymers were added inPPES system in order to reduce the viscosity of the blend systems and improve the processability ofPPES. Different proportions of block copolymer were added in PPES systems, the rheologicalproperties, thermal decomposition temperature, mechanical properties were studied. The resultsshowed that when joined the block copolymer content with in10%, the processing temperature couldreduce30~40℃. The liquidity of blends was increased, the thermal decomposition temperature wasdecreased with the increased by copolymerization.