The Curing Behavior and Properties of Diglycidyl Ether of 4,4′-Bis(4-hydroxybenzoyloxy)-3,3′,5,5′-tetramethylbiphenyl and its Composites with Multi-Wall Carbon Nanotubes

摘要

The curing system of a liquid crystalline epoxy monomer, diglycidyl ether of 4,4′-bis(4-hydroxybenzoyloxy)-3,3′,5,5′-tetramethylbiphenyl (DGE-BHBTMBP), and curing agent diaminodiphenylsulfon (DDS) was investigated by means of differential scanning calorimetry (DSC). Physical properties of the cured polymer and its composites with carbon nanotubes were evaluated with dynamic mechanical thermal analysis (DMA). Test of transmission electron microscopy (TEM) showed that oxidated multi-wall carbon nanotubes (OX-MWNT) performed a better dispersion in the cured polymer than untreated MWNT did. The storage modulus of the cured polymer containing OX-MWNT increased, while that containing untreated MWNT decreased. The results also showed that the T_g decreased when the MWNT was filled.