Preparation and characterization of polybutadiene rubber nased on hydrogen bond and dynamic borate ester bond

Abstract

Through the thiol-ene click reaction, the dihydroxyl functional group was grafted onto the polybutadiene(PB) molecular chain. And Tannic acid(TA) was successfully incorporated into dihydroxyl functionalized PB through the synergy of hydrogen bonding interactions and dynamic boronic ester bonds, prepared multifunctional cross-linked PB. The structure of the polymer composites was characterized by nuclear magnetic resonance hydrogen spectroscopy and Fourier transform infrared spectroscopy. The result showed that dihydroxyl group was successfully grafted onto the PB molecular chain. The compatibility of TA in PB matrix was improved by the hydrogen bonds between the dihydroxyl group and TA. The introduction of hydrogen and boronic ester bonds could improve the mechanical properties of PB effectively. TA endowed the PB with ageing resistance, and the cross-linked PB had great remoldability.

Keywords

• polybutadiene
• tannic acid
• boronic ester bond
• mechanical property
• ageing resistance
• remoldability