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

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May 10th, 12:00 PM May 10th, 2:00 PM

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.