PPEKK/PEI共混物的相容性及拉伸性能

作为相容体系 ,聚芳醚酮与聚醚酰亚胺 (ＰＥＩ)共混物体系的研究受到了研究者的重视1～ 4] .由于现在已商品化的聚芳醚酮基本上都是半结晶型聚合物 ,所以有有关无定型聚芳醚酮与聚醚酰亚胺共混物的研究鲜见报道 .含二氮杂萘酮结构聚芳醚酮酮 (ＰＰＥＫＫ)是一种新型耐高温聚合物 ,相比于已经商品化的各种聚芳醚酮 ,ＰＰＥＫＫ除具有优异的综合性能外 ,它最大的特点表现在以下两方面 ,ＰＰＥＫＫ耐热性突出 ,玻璃化转变温度 (Ｔｇ)为 2 4 5℃左右 ,远高于各种商品化的聚芳醚酮 ;ＰＰＥＫＫ为无定型聚合物 ,易溶于多种有机极性溶剂 ,大大的扩…

MISCIBILITY AND TENSILE PROPERTIES OF POLY (PHTHALAZINONE ETHER KETONE KETONE) /POLY(ETHER IMIDE) BLENDS

As the miscible polymer blend systems,poly(arylene ether ketone)s (PAEK)/poly(ether imide) (PEI) blends had attracted many researches.Because almost all the commercial PAEK are the semi crystalline polymers,no amorphous PAEK and PEI blends had been researched.Poly(phthalazinone ether ketone ketone) (PPEKK),a novel high heat resistant performance thermoplastic,is an amorphous PAEK.The miscibility of PPEKK/PEI blends was investigated using ternary solution methods and differential scanning calorimetry(DSC).The ternary solution methods results indicated that the blends are miscible because chloroform solution of blends is uniform after being kept more than 10 days. A single glass transition temperature( T g) for different compositions blends was showed by DSC results and the relationship of T g s and composition is in agreement with Gordon Taylor equation which is applied for the miscible polymer blends.Scanning electron microscopy for as quenched PPEKK/PEI blend sample further proved the miscibility of the blends.The FT IR results indicated that the interaction of two polymers in the blends is weak,therefore,the miscibility of the blends should be contributed to the repulsion between the two components is weaker than that in themselves.The tensile properties of blends' film samples were tested and the tensile modulus,tensile strength and elongation at break of some composition blends are larger than that of pure resins,which can be explained by the miscibility of the blends.