Abstract
Copolymerizations of p-acetoxybenzoic acid (p-ABA) and m-acetoxybenzoic acid (m-ABA) were carried out in liquid paraffin at 330°C without stirring. Needlelike crystals are obtained when the content of m-ABA in the feed (χf) is in the range of 0-30 mol %. These needlelike crystals are inclined to show the fibrillation in both ends and the radial growth nature from the central part as χf increased. At higher χf than 40 mol %, crystals are not precipitated during polymerization. The content of m-oxybenzoyl units in the obtained whiskers (χw) are much lower than χf. The details of the polymerization and crystallization processes reveal that cooligomers containing more m-oxybenzoyl units cannot participate in the formation of needlelike crystals due to the higher solubility and the segregation effect of crystallization. The whiskers are predominantly formed by co-oligomers consisting almost entirely of p-oxybenzoyl units.
| Original language | English |
|---|---|
| Pages (from-to) | 739-745 |
| Number of pages | 7 |
| Journal | Journal of Polymer Science, Part A: Polymer Chemistry |
| Volume | 34 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - Apr 15 1996 |
Keywords
- Copolymerization
- Crystals crystallization during polymerization
- Needlelike
- Poly(oxy-1,4-benzenediylcarbonyl)
- Polymer whisker
ASJC Scopus subject areas
- Polymers and Plastics
- Organic Chemistry
- Materials Chemistry