Abstract
Abstract The effect of Joncryl ADR®-4368 (abbreviated ADR) and dicumyl peroxide (DCP) on poly(butylene adipate-co-terephthalate) (PBAT)/poly(lactic acid) (PLA) blend was investigated. Two different blending procedures were adopted: (1) one-step blending of all components for 8 min; (2) premixing of PBAT and ADR (or DCP) for 4 min followed by addition of PLA blending for 4 min. ADR and DCP were effective compatibilizers for the PBAT/PLA blend by one-step blending which were confirmed by improving the phase interface between PBAT and PLA, decreasing the dispersed phase size, increasing the elasticity, viscosity and tensile strength. Moreover, the addition of ADR into PBAT/PLA blend by two-step blending was more efficient than the one-step blending based on refined morphology and further increased tensile properties. The two-step blending was beneficial to produce a larger amount of PBAT-graft-PLA (PBAT-g-PLA) copolymers at the phase interface. However, DCP was added to the PBAT/PLA blend by the two-step blending which showed lower properties than one-step blending. DCP triggered free branching reactions in a fast way. Based on the character of compatibilizers, choosing properly blending procedures can enlarge the tensile properties. These results would be interesting for industrial polymer materials, and may be importance to the wider practical application of PBAT/PLA blends.
Highlights
Polymers have been developed and used in many fields in the past century and have become an integral part of human life [1]
In order to investigate the effect of ADR and dicumyl peroxide (DCP) on the interaction between poly(butylene adipate-co-terephthalate) (PBAT) and poly(lactic acid) (PLA), structure of PBAT/PLA blend and modified PBAT/PLA blends was characterized by Fourier transform infrared spectroscopy (FTIR) spectra
The results demonstrated that the compatibility and mechanical properties of PBAT/PLA blends were enhanced in the presence of ADR and DCP by one-step blending due to the formation of PBAT-g-PLA copolymers which increased the interface adhesion
Summary
Polymers have been developed and used in many fields in the past century and have become an integral part of human life [1]. These polymers are most derived from nonrenewable fossil resources and can’t be degraded in nature. Its flexibility was derived from aliphatic hydrocarbons and rigidity was supported by aromatic. It has been commercialized [3] and is designed for film production [4] with a high elongation at break. Compared with the copolymerization method, the blending modification of PBAT is more economical and effective for industrial production
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