The Effect of End Group and Molecular Weight on the Yellowness of Polyetherimide
Abstract
The effects of end group and molecular weight on the yellowness of telechelic polyetherimide (PEI) are investigated. Electron‐withdrawing dianhydride end groups reduce the yellowness and increase the transparency of PEI regardless of the molecular weight. Electron‐donating phenyl, amine, and phthalic end groups increase the yellowness of PEI but the effect depends on the molecular weight. As the molecular weight is increased, the yellowness of PEIs with electron‐donating end groups initially decreases due to a decreasing end‐group density and then increases due to an increasing probability of charge‐transfer complex formation. The systematic study reveals the correlations among yellowness, end group, and molecular weight of PEIs. The correlations can be used for designing highly transparent PEIs and other high‐performance polymers.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Apr 14, 2018
- Source ID
- 10.1002/marc.201800045
Entities
People
- Guoliang Liu
- Ke Cao
- Mingxuan Zhang
Organizations
- Air Force Office of Scientific Research
- Virginia Tech