Hyperbranched aromatic polyesters
- Eastman Kodak Co., Rochester, NY (United States)
- Lehrstuhl fuer Makromolekulare Stoffe, Garching (Germany)
Hyperbranched macromolecules based on the step-growth of AxB type monomers are receiving a considerable amount of research attention. Kim and Webster, for example, have prepared hyperbranched polyphenylenes and shown that they have unusual solubility and other properties. The authors have prepared hyperbranched aromatic polyesters based on 3,5-dihydroxybenzoic acid (I) and 5-hydroxyisophthalic acid (II) using melt acidolysis of the acetate esters. The properties of these unique hyperbranched macromolecules are very different from those of their linear analogues. The hyperbranched polyesters from I are soluble in a variety of organic solvents, are non-entangled in the solid state, and give very low solution viscosities even at weight average molecular weights of over 1,000,000. The polyesters from II have a very high Tg and can be converted to water soluble polyesters by forming the inorganic salt. These polyesters also exhibit low solution viscosities and the salts show a polyelectrolyte effect in water.
- OSTI ID:
- 141832
- Report Number(s):
- CONF-930304--
- Country of Publication:
- United States
- Language:
- English