Citation:
LI Wei, CAI Ming-Zhong. Synthesis and Properties of Polyether ketone ketone/4,4'-Diphenoxydiphenylsulfone Multiblock Copolymers[J]. Chinese Journal of Applied Chemistry,
;2004, 21(7): 669-672.
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A series of multiblock copolymers composed of polyether ketone ketone (PEKK) and 4,4'-diphenoxydiphenylsulfone (DPODPS) were synthesized by polycondensation of acyl chloride-terminated PEKK oligomers and 4,4'-diphenoxydiphenylsulfone.The properties of the copolymers were characterized by DSC and TGA.The results indicated that the Tg of the copolymers increases with increase in DPODPS content and the Tm of the copolymers decreases with increase in DPODPS content.When the ω(DPODPS) of the copolymers ranged from 32.63% to 40.73%,the Tg of the copolymers were in range from 185℃ to 193℃,20~28℃ higher than that of para-linked pure PEKK and the Tm of the copolymers were from 322℃ to 346℃,35~59℃ lower than that of para-linked pure PEKK.The copolymers showed both good thermal property and melting-processing property.The tensile strengths of the copolymers containing 32.63%~40.73% DPODPS are 86.6~84.2 MPa,the tensile modulus 3.1~3.4 GPa and the breaking elongation 18.5%~20.3%.
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