Abstract
Composition control of aromatic poly(thioester-amide) was examined by the reaction-induced phase separation during polymerization of S-acetyl-4- mercaptobenzoic acid (AMBA) and p-acetylaminobenzoic acid (AABA) in aromatic solvent. The poly(thioester-amide)s were obtained as precipitates and their yields became lower at the middle range of the content of AMBA in feed (χf). The contents of p-mercaptobenzoyl (MB) moiety (χp) in the precipitates prepared without shearing were in good agreement with the χf values. In contrast to this, the χp values of the precipitates prepared at χf of 50-70 mol % under shearing were much lower than the χf values. The reaction rate of AMBA increased with shearing, whereas that of AABA was unchanged by shearing. This shearing effect on the reaction rates accelerated to form the homo-oligomers. The solubility of MB oligomers enhanced by shearing, whereas that of p-benzamide oligomers did not enhance owing to the strong interaction through hydrogen bonding. The MB oligomers were inhibited to be precipitated, resulting in the lower χp values than the χf values. The composition could be controlled by the application of the shearing to the heterogeneous polymerization.
| Original language | English |
|---|---|
| Pages (from-to) | 4301-4308 |
| Number of pages | 8 |
| Journal | Journal of Polymer Science, Part A: Polymer Chemistry |
| Volume | 51 |
| Issue number | 20 |
| DOIs | |
| Publication status | Published - Oct 2013 |
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Keywords
- composition control
- copolymerization
- crystallization
- poly(thioester-amide)
- polyamides
- polycondensation
- shear
- step-growth polymerization
ASJC Scopus subject areas
- Materials Chemistry
- Polymers and Plastics
- Organic Chemistry
Cite this
Heterogeneous polycondensation for composition control of poly(p-mercaptobenzoyl-co-p-benzamide) by shearing. / Ichimori, Toshimitsu; Yamazaki, Shinichi; Kimura, Kunio.
In: Journal of Polymer Science, Part A: Polymer Chemistry, Vol. 51, No. 20, 10.2013, p. 4301-4308.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Heterogeneous polycondensation for composition control of poly(p-mercaptobenzoyl-co-p-benzamide) by shearing
AU - Ichimori, Toshimitsu
AU - Yamazaki, Shinichi
AU - Kimura, Kunio
PY - 2013/10
Y1 - 2013/10
N2 - Composition control of aromatic poly(thioester-amide) was examined by the reaction-induced phase separation during polymerization of S-acetyl-4- mercaptobenzoic acid (AMBA) and p-acetylaminobenzoic acid (AABA) in aromatic solvent. The poly(thioester-amide)s were obtained as precipitates and their yields became lower at the middle range of the content of AMBA in feed (χf). The contents of p-mercaptobenzoyl (MB) moiety (χp) in the precipitates prepared without shearing were in good agreement with the χf values. In contrast to this, the χp values of the precipitates prepared at χf of 50-70 mol % under shearing were much lower than the χf values. The reaction rate of AMBA increased with shearing, whereas that of AABA was unchanged by shearing. This shearing effect on the reaction rates accelerated to form the homo-oligomers. The solubility of MB oligomers enhanced by shearing, whereas that of p-benzamide oligomers did not enhance owing to the strong interaction through hydrogen bonding. The MB oligomers were inhibited to be precipitated, resulting in the lower χp values than the χf values. The composition could be controlled by the application of the shearing to the heterogeneous polymerization.
AB - Composition control of aromatic poly(thioester-amide) was examined by the reaction-induced phase separation during polymerization of S-acetyl-4- mercaptobenzoic acid (AMBA) and p-acetylaminobenzoic acid (AABA) in aromatic solvent. The poly(thioester-amide)s were obtained as precipitates and their yields became lower at the middle range of the content of AMBA in feed (χf). The contents of p-mercaptobenzoyl (MB) moiety (χp) in the precipitates prepared without shearing were in good agreement with the χf values. In contrast to this, the χp values of the precipitates prepared at χf of 50-70 mol % under shearing were much lower than the χf values. The reaction rate of AMBA increased with shearing, whereas that of AABA was unchanged by shearing. This shearing effect on the reaction rates accelerated to form the homo-oligomers. The solubility of MB oligomers enhanced by shearing, whereas that of p-benzamide oligomers did not enhance owing to the strong interaction through hydrogen bonding. The MB oligomers were inhibited to be precipitated, resulting in the lower χp values than the χf values. The composition could be controlled by the application of the shearing to the heterogeneous polymerization.
KW - composition control
KW - copolymerization
KW - crystallization
KW - poly(thioester-amide)
KW - polyamides
KW - polycondensation
KW - shear
KW - step-growth polymerization
UR - http://www.scopus.com/inward/record.url?scp=84884283283&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84884283283&partnerID=8YFLogxK
U2 - 10.1002/pola.26839
DO - 10.1002/pola.26839
M3 - Article
AN - SCOPUS:84884283283
VL - 51
SP - 4301
EP - 4308
JO - Journal of Polymer Science, Part A: Polymer Chemistry
JF - Journal of Polymer Science, Part A: Polymer Chemistry
SN - 0887-624X
IS - 20
ER -