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Synthesis and Properties of Novel Poly(aryl Ether Ketone)s

Author: TaoHongBo
Tutor: PengHan
School: South China University of Technology
Course: Materials Science
Keywords: Poly(aryl ethers ketone)s pendant group crosslinkable solubility property thermal property
CLC: O632
Type: Master's thesis
Year: 2011
Downloads: 34
Quote: 1
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Abstract


Poly（aryl ethers ketone）s is a kind of semi-crystallization polymer material with good thermal stability, high solvent-resistan property, excellent flame retardaney, excellent electrical performance and unique mechanical property, so it was widely used in aerospace, military equipments areas. But it is diffcult to process for it’s high melting point and high solvent-resistan property. Therefore, synthesis Poly（aryl ethers ketone）s with good solubility but doesn’t influence the propertities is meaningful.In this paper,a novel Poly（aryl ethers ketone）s with phthalimide group in the side chains was synthesized through copolymerization by diphenol （hydroquinone, 4, 4’-dihydroxy diphenyl sulfone bisphenol） and 5-N- phthalimide-1, 3-bis（4-fluorobenzoyl）benzene,which was first synthesized through two steps and characterized by IR、NMR. XRD results show that polymers with phthalimide group are amorphous and can dissolve in the commonly used solvents, such as NMP、DMF、DMSO、THF、DMAc at room temperature. DSC and TGA results show that phthalimide group can also improve the thermal property of polymers.In addition, Hydroxyl-ended and fluor- ended hyperbranched Poly（aryl ethers ketone）s were synthesized through A2+B3 mothod by using hydroquinone and tri-diuro ketone, which was synthesized and characterized by IR and NMR. These two kinds of HBPEKs are both soluable in commonly used solvents, such as NMP、DMSO、THF and so on. DSC and TGA study found that Tg of OH-HBPEK and F-HBPEK are 190 and 137℃, the 5% weight loss temperature are 394℃and 488℃, respectively.Finally, a crosslinkable poly（aryl ether ketone） containing pendant phenylethynyl group was synthesized through copolymerization by hydroquinone and 5- phenylacetylene -1, 3-bis- （4-fluorobenzoyl）benzene,which was synthesized and characterized by IR、NMR, then cured at 370℃for 1h. XRD result shows that the polymer are amorphous and can dissolve NMP、DMF、DMSO、THF、DMAc at room temperature before cured and TGA results shows that the polymer owns good thermal stability, it’s 5% weight loss temperature is more than 490℃and carbon residuae can achieve 67.5% at 850℃after cured.

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CLC: > Mathematical sciences and chemical > Chemistry > Polymer chemistry ( polymer ) > Carbon - chain polymers
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