Abstract
Morphology control of poly(ether ketone) (PEK) was examined by using the crystallization during the nucleophilic aromatic substitution reaction of potassium salt of 4-fluoro-4′-hydroxybenzophenone. Polymerizations were carried out at 290 °C. The PEK was obtained as precipitates and its morphology was highly influenced by the polymerization condition such as the solvent, the concentration and the polymerization time. High crystalline spindle-like crystals were obtained by the polymerization in diphenyl sulfone (DPS) at a concentration of 5.0% for 2 h with the yield of 86%. The average length and width were 1.4 μm and 300 nm respectively, and the maximum thickness was 130 nm. The surface was not smooth and it was hilly. The spindle-like crystal was likely consisted of multilayered lamellae comprised of the microcrystallites. The molecules were oriented perpendicular to the lamella. The polymerization in DPS at a higher concentration of 10.0% afforded the networks of nanofibres, of which the diameter was 100-250 nm. The obtained PEK precipitates possessed excellent thermal properties.
| Original language | English |
|---|---|
| Pages (from-to) | 1787-1795 |
| Number of pages | 9 |
| Journal | European Polymer Journal |
| Volume | 48 |
| Issue number | 10 |
| DOIs | |
| Publication status | Published - Oct 2012 |
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Keywords
- Fibre
- Morphology
- Poly(ether ketone)
- Reaction-induced crystallization
- Spindle
ASJC Scopus subject areas
- Polymers and Plastics
- Physics and Astronomy(all)
- Organic Chemistry
Cite this
Morphosynthesis of poly(ether ketone) by reaction-induced crystallization during polymerization. / Wakabayashi, Kanji; Sumi, Naofumi; Yamazaki, Shinichi; Uchida, Tetsuya; Kimura, Kunio.
In: European Polymer Journal, Vol. 48, No. 10, 10.2012, p. 1787-1795.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Morphosynthesis of poly(ether ketone) by reaction-induced crystallization during polymerization
AU - Wakabayashi, Kanji
AU - Sumi, Naofumi
AU - Yamazaki, Shinichi
AU - Uchida, Tetsuya
AU - Kimura, Kunio
PY - 2012/10
Y1 - 2012/10
N2 - Morphology control of poly(ether ketone) (PEK) was examined by using the crystallization during the nucleophilic aromatic substitution reaction of potassium salt of 4-fluoro-4′-hydroxybenzophenone. Polymerizations were carried out at 290 °C. The PEK was obtained as precipitates and its morphology was highly influenced by the polymerization condition such as the solvent, the concentration and the polymerization time. High crystalline spindle-like crystals were obtained by the polymerization in diphenyl sulfone (DPS) at a concentration of 5.0% for 2 h with the yield of 86%. The average length and width were 1.4 μm and 300 nm respectively, and the maximum thickness was 130 nm. The surface was not smooth and it was hilly. The spindle-like crystal was likely consisted of multilayered lamellae comprised of the microcrystallites. The molecules were oriented perpendicular to the lamella. The polymerization in DPS at a higher concentration of 10.0% afforded the networks of nanofibres, of which the diameter was 100-250 nm. The obtained PEK precipitates possessed excellent thermal properties.
AB - Morphology control of poly(ether ketone) (PEK) was examined by using the crystallization during the nucleophilic aromatic substitution reaction of potassium salt of 4-fluoro-4′-hydroxybenzophenone. Polymerizations were carried out at 290 °C. The PEK was obtained as precipitates and its morphology was highly influenced by the polymerization condition such as the solvent, the concentration and the polymerization time. High crystalline spindle-like crystals were obtained by the polymerization in diphenyl sulfone (DPS) at a concentration of 5.0% for 2 h with the yield of 86%. The average length and width were 1.4 μm and 300 nm respectively, and the maximum thickness was 130 nm. The surface was not smooth and it was hilly. The spindle-like crystal was likely consisted of multilayered lamellae comprised of the microcrystallites. The molecules were oriented perpendicular to the lamella. The polymerization in DPS at a higher concentration of 10.0% afforded the networks of nanofibres, of which the diameter was 100-250 nm. The obtained PEK precipitates possessed excellent thermal properties.
KW - Fibre
KW - Morphology
KW - Poly(ether ketone)
KW - Reaction-induced crystallization
KW - Spindle
UR - http://www.scopus.com/inward/record.url?scp=84866135228&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84866135228&partnerID=8YFLogxK
U2 - 10.1016/j.eurpolymj.2012.07.004
DO - 10.1016/j.eurpolymj.2012.07.004
M3 - Article
AN - SCOPUS:84866135228
VL - 48
SP - 1787
EP - 1795
JO - European Polymer Journal
JF - European Polymer Journal
SN - 0014-3057
IS - 10
ER -