Abstract
J. Polym. Sci., Part A: Polym. Chem. 2015, 53, 1966-1974 Formation mechanism of poly(1,4-phenylene-5-hydroxyisophthalamide) hollow spheres prepared by the reaction-induced phase separation during polymerization was considered from the view points of eliminated small molecules, polymer structure, and cross-linking reaction. Water was the most desirable to form gas-bubbles and rigid polymer structure was also needed for the rapid solidification of droplets. Further, the formation of the cross-linked skin layer was important to encapsulate gas-bubbles in the droplets.
Hollow spheres of poly(1,4-phenylene-5-hydroxyisophthalamide) had been obtained by the reaction-induced phase separation during polymerization of 5-hydroxyisophthalic acid and 1,4-phenylene diamine in an aromatic solvent. In this study, formation mechanism of the hollow spheres was considered from the view points of eliminated small molecules, polymer structure, and cross-linking reaction. With respect to the eliminated small molecules, water was the most desirable to form gas-bubbles in droplets compared with methanol and acetic acid, due to the insolubility into the polymerization system. Rigid polymer structure was also needed to prepare hollow spheres owing to the rapid solidification of droplets. Further, phenolic hydroxyl group in 5-hydroxy-1,3-phenylene moiety caused the ester-amide exchange reaction to form cross-linked skin layer in the droplets. The efficient formation of the skin layer was important to encapsulate gas-bubbles in the droplets, resulting in the formation of hollow structure.
| Original language | English |
|---|---|
| Pages (from-to) | 1966-1974 |
| Number of pages | 9 |
| Journal | Journal of Polymer Science, Part A: Polymer Chemistry |
| Volume | 53 |
| Issue number | 17 |
| DOIs | |
| Publication status | Published - Sep 1 2015 |
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Keywords
- high-performance polymers
- hollow spheres
- morphology
- phase separation
- polyamides
ASJC Scopus subject areas
- Materials Chemistry
- Polymers and Plastics
- Organic Chemistry
Cite this
Consideration on formation mechanism of aromatic polyamide hollow spheres prepared by reaction-Induced phase separation. / Nakayama, Hirofumi; Fujitsu, Yuji; Uchida, Tetsuya; Yamazaki, Shinichi; Kimura, Kunio.
In: Journal of Polymer Science, Part A: Polymer Chemistry, Vol. 53, No. 17, 01.09.2015, p. 1966-1974.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Consideration on formation mechanism of aromatic polyamide hollow spheres prepared by reaction-Induced phase separation
AU - Nakayama, Hirofumi
AU - Fujitsu, Yuji
AU - Uchida, Tetsuya
AU - Yamazaki, Shinichi
AU - Kimura, Kunio
PY - 2015/9/1
Y1 - 2015/9/1
N2 - J. Polym. Sci., Part A: Polym. Chem. 2015, 53, 1966-1974 Formation mechanism of poly(1,4-phenylene-5-hydroxyisophthalamide) hollow spheres prepared by the reaction-induced phase separation during polymerization was considered from the view points of eliminated small molecules, polymer structure, and cross-linking reaction. Water was the most desirable to form gas-bubbles and rigid polymer structure was also needed for the rapid solidification of droplets. Further, the formation of the cross-linked skin layer was important to encapsulate gas-bubbles in the droplets.Hollow spheres of poly(1,4-phenylene-5-hydroxyisophthalamide) had been obtained by the reaction-induced phase separation during polymerization of 5-hydroxyisophthalic acid and 1,4-phenylene diamine in an aromatic solvent. In this study, formation mechanism of the hollow spheres was considered from the view points of eliminated small molecules, polymer structure, and cross-linking reaction. With respect to the eliminated small molecules, water was the most desirable to form gas-bubbles in droplets compared with methanol and acetic acid, due to the insolubility into the polymerization system. Rigid polymer structure was also needed to prepare hollow spheres owing to the rapid solidification of droplets. Further, phenolic hydroxyl group in 5-hydroxy-1,3-phenylene moiety caused the ester-amide exchange reaction to form cross-linked skin layer in the droplets. The efficient formation of the skin layer was important to encapsulate gas-bubbles in the droplets, resulting in the formation of hollow structure.
AB - J. Polym. Sci., Part A: Polym. Chem. 2015, 53, 1966-1974 Formation mechanism of poly(1,4-phenylene-5-hydroxyisophthalamide) hollow spheres prepared by the reaction-induced phase separation during polymerization was considered from the view points of eliminated small molecules, polymer structure, and cross-linking reaction. Water was the most desirable to form gas-bubbles and rigid polymer structure was also needed for the rapid solidification of droplets. Further, the formation of the cross-linked skin layer was important to encapsulate gas-bubbles in the droplets.Hollow spheres of poly(1,4-phenylene-5-hydroxyisophthalamide) had been obtained by the reaction-induced phase separation during polymerization of 5-hydroxyisophthalic acid and 1,4-phenylene diamine in an aromatic solvent. In this study, formation mechanism of the hollow spheres was considered from the view points of eliminated small molecules, polymer structure, and cross-linking reaction. With respect to the eliminated small molecules, water was the most desirable to form gas-bubbles in droplets compared with methanol and acetic acid, due to the insolubility into the polymerization system. Rigid polymer structure was also needed to prepare hollow spheres owing to the rapid solidification of droplets. Further, phenolic hydroxyl group in 5-hydroxy-1,3-phenylene moiety caused the ester-amide exchange reaction to form cross-linked skin layer in the droplets. The efficient formation of the skin layer was important to encapsulate gas-bubbles in the droplets, resulting in the formation of hollow structure.
KW - high-performance polymers
KW - hollow spheres
KW - morphology
KW - phase separation
KW - polyamides
UR - http://www.scopus.com/inward/record.url?scp=84937513371&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84937513371&partnerID=8YFLogxK
U2 - 10.1002/pola.27683
DO - 10.1002/pola.27683
M3 - Article
VL - 53
SP - 1966
EP - 1974
JO - Journal of Polymer Science, Part A: Polymer Chemistry
JF - Journal of Polymer Science, Part A: Polymer Chemistry
SN - 0887-624X
IS - 17
ER -