The Mechanical Properties of Jute/PLA Composites Combining Nano Polymerized Styrene Butadiene Rubber Modified by Coupling Agents

Abstract

The jute/polylactic acid (PLA) composite material has been widely concerned in the field of composite materials because of its green, degradable and renewable properties, but its low mechanical properties limit the application field. In order to improve the mechanical properties of jute/PLA composites, styrene butadiene rubber (SBR) particles modified by different silane coupling agents were introduced into PLA matrix, and jute/PLA composites were prepared by solution casting and molding method. The changes in the mechanical properties of the jute/PLA composite were studied, and the toughening mechanism of the jute/PLA composite was analyzed. The results show that SBR particles can induce the crystallization of the PLA matrix, and the coupling agent plays a promoting role. The addition of SBR improves the bending and stretching of the jute/PLA composite. The silane coupling agent KH560 has the best modification effect on SBR particles. When the mass fraction of KH560-SBR particles in the composite is 1.0%, its bending strength and modulus achieve the highest, which are respectively 247.04% and 773.91% higher than the control group. When the mass fraction of KH560-SBR particles added in the composite is 2.0%, its tensile strength and modulus are the largest, 517.91% and 472.00% higher than the control group.

Keywords

• laminated composites
• jute nonwoven
• biodegradation
• styrene-butadiene