Affiliation:
1. Polymer Science Program, University of Connecticut, Institute of Materials Science, 97 North Eagleville Road, Unit 3136, Storrs, CT 06269-3136, USA
Abstract
A phenylethynyl (PE) end-capped oligoimide of number average molecular weight Mn 5000, known as PETI-5K was modified by: (1) varying molecular weight; (2) addition of phenylethynyl (PE) end-capped reactive diluents to PETI oligomides; (3) incorporation of 1,4-cyclohexanyl diamine with PETI-5K diamines; (4) incorporation of 2,4,5-triaminopyrimidine with PETI-5K; and (5) replacement of the PETI-5 diamines, 3,4′-ODA and APB with 2,2′-bis [4-(4-amino-phenoxy) phenyl] hexafluoropropane (4-BDAF) to determine the effects on glass transition temperature and minimum melt viscosity. All approaches caused a reduction in complex minimum melt viscosity, but the minimum melt temperatures were only sufficiently low enough for the material to have melt stability for a hot-melt coating application in methods (2), (4), and (5). The reduction in the complex minimum melt viscosity of oligomer prepared by method (4) may be due to unreacted monomers and a lower oligomer molecular weight, Mn, than calculated.
Subject
Materials Chemistry,Organic Chemistry,Polymers and Plastics
Reference30 articles.
1. Polyimides
2. [2] St. Clair T L 1990 Polyimides, D Wilson , H D Stenzenberger and P M Hergenrother eds ( New York: Blackie & Son ) p 58
3. Synthesis and Characterization of Reactive End-Capped Poiymide Oligomers
Cited by
14 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献