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Citation: LU Dandan, WANG Zhipeng, WANG Honghua, ZHOU Guangyuan, CUI Shanzi. Synthesis and Ring-Opening Polymerization of Cyclic Phenolphthalein Poly(ether ketone ketone) Oligomers[J]. Chinese Journal of Applied Chemistry, ;2014, 31(12): 1378-1383. doi: 10.3724/SP.J.1095.2014.40063 shu

Synthesis and Ring-Opening Polymerization of Cyclic Phenolphthalein Poly(ether ketone ketone) Oligomers

1.
a School of Chemical Engineering, Changchun University of Technology, Changchun 130012, China;
2.
b Changchun Institute of Applied Chemistry of Sciences, Chinese Academy of Sciences, Changchun 130022, China;
3.
c Changzhou Institute of Energy Storage Meterials & Devices, Changzhou 213002, China

Corresponding author: CUI Shanzi,
Received Date: 5 March 2014
Available Online: 14 May 2014
Fund Project: 吉林省科技发展计划资助项目(20130204029GX) (20130204029GX)

Under pseudo high dilution conditions,cyclic oligomers of phenolphthalein poly(ether ketone ketone) s(c-PEKK-C) were synthesized from phenolphthalein and 4,4'-difluorotribenzodiketone(DFTBDK) with a cyclization ratio of 78%.MALDI-TOF MS characterization indicates that c-PEKK-C has a broad size distribution(n=2~8) with cyclic dimers and trimers as main components(85%).The molecular structure of DFTBDK is prone to form cyclic structure that can be confirmed by Jacobson-Stockmayer theory.Melt ringopening polymerization(ROP)(300~350℃) of cyclic oligomers catalyzed by potassium 4,4'-biohenol gives the corresponding linear products with high relative molecular mass(M_w 1.2×10⁵).
- aromatic cyclic oligomers,
- phenolphthalein poly(ether ketone ketone) s,
- pseudo high dillution technology
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