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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. shu

Synthesis and Properties of Polyether ketone ketone/4,4'-Diphenoxydiphenylsulfone Multiblock Copolymers

LI Wei ,
CAI Ming-Zhong ^,

1.
Institute of Chemistry, Jiangxi Normal University, Nanchang 330027

Corresponding author: CAI Ming-Zhong,
Received Date: 27 June 2003
Available Online: 21 April 2004
Fund Project: 国家自然科学基金(29060010) (29060010)江西省自然科学基金(025014)资助项目 (025014)

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 T_g of the copolymers increases with increase in DPODPS content and the T_m of the copolymers decreases with increase in DPODPS content.When the ω(DPODPS) of the copolymers ranged from 32.63% to 40.73%,the T_g of the copolymers were in range from 185℃ to 193℃,20~28℃ higher than that of para-linked pure PEKK and the T_m 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%.
- polyether ketone ketone,
- diphenoxydiphenylsulfone,
- multiblock copolymer,
- thermal property,
- mechanical property
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