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Improved Processing and Properties for Polyphenylene Oxide Modified by Diallyl Orthophthalate Prepolymer
Honghua Wang1, Qilin Mei1, Yujie Ding1
1School of Materials Science and Engineering, Wuhan University of Technology, 122 Luoshi Road, Wuhan 430070, China.
Polymers
|December 11, 2019
Summary
Diallyl orthophthalate (DAOP) prepolymer enhances thermoplastic processability by reducing blend viscosity. Its addition improves flow during curing, though higher PPO content lowers the cure degree.
Area of Science:
- Polymer Science
- Materials Science
Background:
- Thermoplastics often exhibit poor processability due to high viscosity.
- Reactive plasticizers offer a route to improve melt flow and processing characteristics.
Purpose of the Study:
- To investigate diallyl orthophthalate (DAOP) prepolymer as a reactive plasticizer for polyphenylene oxide (PPO).
- To evaluate the impact of DAOP on the rheology, thermal properties, and morphology of PPO blends during curing.
Main Methods:
- Rheological monitoring of DAOP/PPO blends during curing.
- Differential scanning calorimetry (DSC) to assess cure degree.
- Morphological analysis of phase-separated blends.
Main Results:
- DAOP prepolymer addition significantly decreased blend viscosity, indicating improved processability.
- Increasing PPO content reduced the cure degree of DAOP prepolymer due to a dilution effect.
- Phase separation during curing influenced blend morphology and conversion near the gel point.
Conclusions:
- DAOP prepolymer effectively improves the processability of PPO.
- The interplay between reactive plasticization, phase separation, and curing kinetics governs blend behavior and morphology development.
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