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- W1998077287 abstract "Abstract Two phenylethynyl phthalic anhydride‐capped imide oligomers, AFR‐PEPA‐2 and AFR‐PEPA‐8, with molecular weights of 1 601 and 4 699 g · mol −1 , respectively, were synthesized and characterized. The AFR‐PEPA‐ N oligomers show higher glass transition temperatures and higher thermal decomposition temperatures than phenylethynyl‐terminated imide PETI‐5. After curing for 1 h at 390 °C, AFR‐PEPA‐2 and AFR‐PEPA‐8 have T g s of 370 and 358 °C, respectively. AFR‐PEPA‐ N oligomers demonstrated lower minimum complex melt viscosities than PETI‐5 due to the presence of CF 3 group in the backbone structure. 1 601 g · mol −1 AFR‐PEPA‐2 imide oligomer has a complex melt viscosity of 10 Pa · s at 340 °C, and 4 699 g · mol −1 AFR‐PEPA‐8 imide oligomer has a complex melt viscosity of 227 Pa · s at 371 °C. AFR‐PEPA‐ N film's crystal morphology was observed using polarized optical microscopy and the AFR‐PEPA‐8 oligomer did not show crystallinity. AFR‐PEPA‐2 film exhibits semicrystalline behavior and the crystallinity does not disappear until the film is cured above 375 °C. magnified image" @default.
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- W1998077287 date "2007-01-05" @default.
- W1998077287 modified "2023-10-18" @default.
- W1998077287 title "Phenylethynyl End‐Capped Fluorinated Imide Oligomer AFR‐PEPA‐<i>N</i>: Morphology and Processibility Characteristics" @default.
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- W1998077287 doi "https://doi.org/10.1002/mame.200600306" @default.
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