Properties of Blends of Polyphenylsulfone and Acetylene Terminated Reactive Plasticizer
Abstract
Polyblends of polyphenylsulfone (PPS) and reactive plasticizer (acetylene terminated sulfone) have been considered as matrix resins for graphite reinforced composites. The thermoplastic polyphenylsulfone provides high glass transition temperature and therefore high end-use temperature while the reactive plasticizer-acetylene terminated sulfone (ATS) lowers the glass transition temperatures and the viscosities of the blends for the purpose of improved processing conditions. Since ATS contains reactive acetylene functional groups, it reacts and becomes dormant in the system. Blends of polyphenylsulfone and reactive plasticizer have been prepared in weight percent compositions of 90 PPS/10 ATS, 80 PPS/20 ATS, 70 PPS/30 ATS, and 60 PPS/40 ATS. These were cast from chloroform solvent yielding clear films. The calculated and measured refractive indices of PPS/ATS are about the same and therefore light scattering studies of polyblends have not shown any phase separation of PPS and ATS. Transmission electron microscopy on microtomed specimens of PPS/ATS blends indicates a possibility of phase-separation of the the two components but it needs further investigation. Cure studies of these blends have shown retention of about 14% solvent which has additional influence in lowering the Tg of the blends.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1981
- Accession Number
- ADA111393
Entities
People
- Ivan J. Goldfarb
- Steven S. Sikka
Organizations
- Wright Laboratory