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Preparation and Properties of Biodegradable Poly(lactic acid)/Poly(butylene adipate-co-terephthalate) Blend with Epoxy-Functional Styrene Acrylic Copolymer as Reactive Agent

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Abstract

Poly (lactic acid) (PLA) and poly (butylene adipate-co-terephthalate) (PBAT) are biodegradable polyesters and can be blended by twin-screw extrusion. Epoxy-functional styrene acrylic copolymer (ESA) was used as reactive agent for PLA/PBAT blends and the mechanical properties, phase morphology, thermal properties, melt properties, and melt rheological behaviors of the blends were investigated. During thermal extrusion, ESA was mainly a chain extender for the PLA matrix but had no evident reaction with PBAT. The great improvement in the toughness of PLA based blends was achieved by the addition of PBAT of no less than 15 wt% and that of ESA of no more than 0.5 wt%. Although SEM micrographs and the reduced deviation of the terminal slope of G′ and G″ indicated better compatibility and adhesion between the two phases, the blend with ESA was still a two-phase system as indicated in DSC curves. Rheological results reveal that the addition of ESA increased the storage modulus (G′), loss modulus (G″) and complex viscosity of the blend at nearly all frequencies. The melt strength and melt elasticity of the blend are improved by addition of ESA.

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Authors and Affiliations

  1. Institute of Nano- and Bio-polymeric Materials, School of Material Science and Engineering, Tongji University, Cao’an Road 4800, Shanghai, 200092, China

    Naiwen Zhang, Chao Zeng, Liang Wang & Jie Ren

  2. Key Laboratory of Advanced Civil Engineering Materials, Ministry of Education, Tongji University, Shanghai, 200092, China

    Jie Ren

Authors
  1. Naiwen Zhang
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  2. Chao Zeng
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  3. Liang Wang
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  4. Jie Ren
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Correspondence to Jie Ren.

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Zhang, N., Zeng, C., Wang, L. et al. Preparation and Properties of Biodegradable Poly(lactic acid)/Poly(butylene adipate-co-terephthalate) Blend with Epoxy-Functional Styrene Acrylic Copolymer as Reactive Agent. J Polym Environ 21, 286–292 (2013). https://doi.org/10.1007/s10924-012-0448-z

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  • DOI: https://doi.org/10.1007/s10924-012-0448-z

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