Study On The Composites And Blends Of Polyarylethers Containing Phthalazinone Moieties

Poly (phthalazinone ether ketone)s (PPEKs) and Poly (phthalazinone ether sulfone)s (PPESs) containing phthalazinone moieties, a series of novel high performance polymers developed by our research group, have much better thermal resistance and solubility than similar high performance polymers. These characteristics permit it to be of great potential in many engineering applications. In order to broaden its use in the fields of reinforce composites, the titanate whisker, short glass fiber, nano-calcium carbonate reinforced PPESK and PPEK composites were prepared in this paper. Furthermore, the blends of PPESK/ABS, PESK/PS and the PPESK/ABS/TK composites were prepared.A group of poly(phthalazinone ether sulfone ketone)/potassium-titanate-whisker (PPSEK/TK) composites was prepared by coprecipatation from solution. The whisker surface was modified using either titanate coupling agent or silane coupling agent prior to blending. The tensile, flexural, impact, morphology and thermal properties of the moulded composites were investigated by means of SEM, DSC and TGA. The measurements showed that silane coupling agent and titanate coupling agent improve the interfacial adhesion between PPESK and TK, the effect of silane coupling agent was better than titanate coupling agent when the content of silane coupling agent was 1% of the weight of whisker. The tensile, impact and flexural strength of the composites increased with increasing whiskers content up to 10 to 20 phr, thereafter they showed a decrease in the whiskers content reached 40 phr. At the same time, the modulus of the composites increased with increasing whiskers content. Scanning electron microscopy studies revealed that the whiskers within the composites were dispersed uniformly after treatment with coupling agent. Finally, thermogravimetric analysis showed that the heat resistance of the composites tended to increase with increasing whisker content.Titanate whisker was also filled into poly(phthalazinone ether ketone),and a group of PPEK/TK composites were prepared by coprecipatation from solution. The whisker surface was modified using titanate coupling agent. The tensile, impact, flexural, thermal and morphology properties of the composites were investigated. Impact and flexure tests showed that the impact and flexural strength of the composites increased with increasing whiskers content. However, the tensile strength of the composites decreased with increasing whisker content. Finally, thermogravimetric analysis showed that the heat resistance of the composites tended to increase with increasing whisker content.There has been considerable interest in upgrading the mechanical performance of polymer by reinforcing with glass fiber. PPESK is of great prospects as high performance fiber reinforced composites because of its excellent thermal stability, soluble and mechanical properties. GF reinforced PPESK composites were prepared by solvent-coprecipation, with silane coupling agents as the surface treatment agents of GF. The morphology and thermal properties of the composites were investigated by means of SEM, DSC and TGA. The results showed that silane coupling agent improved the interfacial adhesion between PPESK and GF. Adding GF to PPESK helped to enhance the tensile, impact and flexural strength of PPESK/GF composites. When the content of GF is 10 phr, the composite exhibited the best mechanical strength. With increasing GF content the glass transition temperatures and 5% weight loss temperatures increased. The effect of silane coupling agent KH-560 was better than the KH-550 in terms of the mechanical and thermal properties.A group of poly(phthalazinone ether ketone sulfone)/nano-caluim carbonate composites(PPESK/CaCO3) were prepared by coprecipation from solution. The tensile, impact, flexural, thermal and morphology properties were investigated. Results showed that nano-CaCC>3 had better toughening effect on PPESK. When the particle content was 4 phr, the PPESK reached maximum tensile and flexural strength; when it was 8 phr, the impact strength reached a peak value. The results showed that titanate coupling agent improved the interfacial adhesion between PPESK and nano-CaCC>3. The variety of the glass transition temperatures for composites was not evidence, but 5% weight loss temperatures increased distinct.The blends of poly(phthalazinone ether ketone sulfone)/polystyrene(PPESK/PS) were prepared by solution coprecipatation. The miscibility, thermal stability, Theological, mechanical properties of the blends were investigated. Results showed that that the PPESK/PS blends were immiscible over the composition range investigated. Thermal and mechanical properties of the blends decreased with the increasing PS content. Blends were pseudoplastic and non-Newtonian. The melt viscosity of blends decreased with the increase of PS content, temperature and shear rate. The flowability of PPESK may be improved greatly by blending PS.The study of PPESK/ ABS blends and PPESK/ ABSATC composites showed that melt of the blends and composites were pseudoplastic and non-Newtonian fluid. Melt viscosity of the blends decreased with the increase of ABS content, temperature and shear rate. Melt viscosity of the composites increased with the increase of TK content and the decrease of temperature and shear rate. The observation of appearance of the extruded strands showed that filling with TK would improve the appearance of products.