Presentation Title
Pegylated Polybenzoxazine Networks from Miscible Blends of Tosylated Poly(ethylene glycol) and a Benzoxazine Monomer
Presentation Type
Poster
Abstract
Blends of BPA-based benzoxazine (BA-a) in end-group tosylated poly(ethyleneglycol) (mPEGOTs) are cured and characterized in this study. Their solubility, polymerization, and the macromolecular characterization are compared to analogue blends of BA-a in hydroxyl-terminated poly(ethyleneglycol) (mPEGOH). BA-a in either type of polymer with >40 wt % monomer was found to have good homogeneity. The BA-a/mPEGOTs blends had a reduced curing temperature up to 50 °C less than that of the mPEGOH blends or of pure BA-a, confirming that the tosylated PEG is a cure promoter for ring opening polymerization (ROP) of BA-a. Free tosylate was detected by TGA-FTIR and TGA-MS during the cure of BA-a. It is proposed that free tosylate acts as a cure catalyst for BA-a ROP. Polybenzoxazine (PBA-a) cured in mPEGOTs consists of a phenolic rich molecular structure with strongly H-bonded hydroxyl groups and grafted PEG-chains as determined by H-NMR and FTIR. The homogenous microstructure of this material, P(BA-a)-graft-mPEGOTs, was confirmed by SEM. By manipulating the blending composition of the BA-a/mPEGOTs resin The glass transition temperature and the thermal stability of the P(BA-a)-graft-mPEGOTs can be tuned based on. These grafted polymers have various potential applications and may lead to novel materials for the electronics, membranes, biomedical plastics, and aerospace industries.
Start Date
10-5-2018 12:00 PM
End Date
10-5-2018 2:00 PM
Genre/Form
posters
Subjects - Topical (LCSH)
Polyethylene glycol; Polymers--Testing
Type
Event
Format
application/pdf
Language
English
Pegylated Polybenzoxazine Networks from Miscible Blends of Tosylated Poly(ethylene glycol) and a Benzoxazine Monomer
Blends of BPA-based benzoxazine (BA-a) in end-group tosylated poly(ethyleneglycol) (mPEGOTs) are cured and characterized in this study. Their solubility, polymerization, and the macromolecular characterization are compared to analogue blends of BA-a in hydroxyl-terminated poly(ethyleneglycol) (mPEGOH). BA-a in either type of polymer with >40 wt % monomer was found to have good homogeneity. The BA-a/mPEGOTs blends had a reduced curing temperature up to 50 °C less than that of the mPEGOH blends or of pure BA-a, confirming that the tosylated PEG is a cure promoter for ring opening polymerization (ROP) of BA-a. Free tosylate was detected by TGA-FTIR and TGA-MS during the cure of BA-a. It is proposed that free tosylate acts as a cure catalyst for BA-a ROP. Polybenzoxazine (PBA-a) cured in mPEGOTs consists of a phenolic rich molecular structure with strongly H-bonded hydroxyl groups and grafted PEG-chains as determined by H-NMR and FTIR. The homogenous microstructure of this material, P(BA-a)-graft-mPEGOTs, was confirmed by SEM. By manipulating the blending composition of the BA-a/mPEGOTs resin The glass transition temperature and the thermal stability of the P(BA-a)-graft-mPEGOTs can be tuned based on. These grafted polymers have various potential applications and may lead to novel materials for the electronics, membranes, biomedical plastics, and aerospace industries.