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The influence of montmorillonite concentration and solvent polarity on the synthesis of benzoxazine monomers in the presence of montmorillonite
Abstract The synthesis of 3,3′-(hexane-1,6-diyl)bis-(3,4-dihydro-2H-1,3-benzoxazine) was done in the absence and in the presence of 10, 30, 50 and 100wt.% montmorillonite (MMT). The MMT exhibits a significant catalytic effect on the ring-opening reaction of the benzoxazine monomer, increasing of MMT amount influences the oligomeric structures in the polybenzoxazine precursor composition according to 1H NMR, 13C NMR and SEC data. The influence of solvent polarity and temperature was also studied especially in correlation with possible interactions between solvent and MMT. The influence of the polybenzoxazine precursor composition on the polymerization behaviour was investigated by DSC. The thermostability of the obtained polybenzoxazines was studied by TGA and DMA method was involved to determine the glass transition temperature.
Graphical abstract Display Omitted
Highlights MMT was used in the synthesis of a benzoxazine monomer. MMT shows a catalytic activity on the ring opening process of benzoxazine monomer. The MMT activity depends on the solvent used in the synthesis. The MMT can control the amount of byproducts obtained during the monomer synthesis.
The influence of montmorillonite concentration and solvent polarity on the synthesis of benzoxazine monomers in the presence of montmorillonite
Abstract The synthesis of 3,3′-(hexane-1,6-diyl)bis-(3,4-dihydro-2H-1,3-benzoxazine) was done in the absence and in the presence of 10, 30, 50 and 100wt.% montmorillonite (MMT). The MMT exhibits a significant catalytic effect on the ring-opening reaction of the benzoxazine monomer, increasing of MMT amount influences the oligomeric structures in the polybenzoxazine precursor composition according to 1H NMR, 13C NMR and SEC data. The influence of solvent polarity and temperature was also studied especially in correlation with possible interactions between solvent and MMT. The influence of the polybenzoxazine precursor composition on the polymerization behaviour was investigated by DSC. The thermostability of the obtained polybenzoxazines was studied by TGA and DMA method was involved to determine the glass transition temperature.
Graphical abstract Display Omitted
Highlights MMT was used in the synthesis of a benzoxazine monomer. MMT shows a catalytic activity on the ring opening process of benzoxazine monomer. The MMT activity depends on the solvent used in the synthesis. The MMT can control the amount of byproducts obtained during the monomer synthesis.
The influence of montmorillonite concentration and solvent polarity on the synthesis of benzoxazine monomers in the presence of montmorillonite
Andronescu, Corina (author) / Gârea, Sorina Alexandra (author) / Deleanu, Călin (author) / Nicolescu, Alina (author) / Iovu, Horia (author)
Applied Clay Science ; 86 ; 99-105
2013-10-10
7 pages
Article (Journal)
Electronic Resource
English