| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 5203230 | Polymer Degradation and Stability | 2011 | 7 Pages |
Abstract
A number of multifunctional ABx-type monomers exist in plant metabolites, and studies on the formation of hyperbranching polymers from ABx-type monomers are very significant in the development of bio-related polymeric materials. We established a method for the preparation of well-defined structures in bio-based, hyperbranched (HB) polyarylates by the copolycondensation of caffeic acid (DHCA) as an AB2-monomer and p-coumaric acid (4HCA) as an AB-monomer, using the highly efficient catalyst Na2HPO4 to regulate the polymerization speed. 1H NMR analysis revealed the time course of the formation of the hyperbranching structures. which strongly affected the glass transition and degradation temperatures, as well as the molecular weight and composition.
Related Topics
Physical Sciences and Engineering
Chemistry
Organic Chemistry
Authors
Siqian Wang, Seiji Tateyama, Daisaku Kaneko, Shin-ya Ohki, Tatsuo Kaneko,