Morphology evolution of poly(lactic acid) during in situ reaction with poly(butylenesuccinate) and ethylene‐methyl acrylate‐glycidyl methacrylate: The formation of a novel 3D star‐like structure

2020 ◽  
Vol 137 (40) ◽  
pp. 49201
Author(s):  
Bin Xue ◽  
He‐Zhi He ◽  
Zhao‐Xia Huang ◽  
Zhiwen Zhu ◽  
Jiqian Li ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Methyl Acrylate ◽  
Glycidyl Methacrylate ◽  
Poly Lactic Acid ◽  
Morphology Evolution ◽  
In Situ Reaction ◽  
Ethylene Methyl Acrylate

scholarly journals Super-Toughened Poly(lactic Acid) with Poly(ε-caprolactone) and Ethylene-Methyl Acrylate-Glycidyl Methacrylate by Reactive Melt Blending

Polymers ◽  
2019 ◽  
Vol 11 (5) ◽  
pp. 771 ◽  
Author(s):  
Ao-Lin Hou ◽  
Jin-Ping Qu
Keyword(s):  
Lactic Acid ◽  
Methyl Acrylate ◽  
Glycidyl Methacrylate ◽  
Phase Morphology ◽  
Poly Lactic Acid ◽  
Ternary Blend ◽  
Differential Scanning Calorimetric ◽  
Melt Blending ◽  
Reactive Melt ◽  
Ethylene Methyl Acrylate

In recent years, poly(lactic acid) (PLA) has attracted more and more attention as one of the most promising biobased and biodegradable polymers. However, the inherent brittleness significantly limits its wide application. Here, ternary blends of PLA, poly(ε-caprolactone) (PCL) with various amounts of ethylene-methyl acrylate-glycidyl methacrylate (EMA-GMA) terpolymer were fabricated through reactive melt blending in order to improve the toughness of PLA. The effect of different addition amounts of EMA-GMA on the mechanical properties, interfacial compatibility and phase morphology of PLA/PCL blends were studied. The reactions between the epoxy groups of EMA-GMA and carboxyl and hydroxyl end groups of PLA and PCL were investigated thorough a Fourier transform infrared (FT-IR). The miscibility and thermal behavior of the blends were studied through a dynamic mechanical analysis (DMA), differential scanning calorimetric (DSC) and X-ray diffraction (XRD). The phase morphology and impact fracture surface of the blends were also investigated through a scanning electron microscope (SEM). With the addition of 8 phr EMA-GMA, a PLA/PCL (90 wt %:10 wt %)/EMA-GMA ternary blend presenting a suitable multiple stacked phase structure with an optimum interfacial adhesion exhibited an elongation at break of 500.94% and a notched impact strength of 64.31 kJ/m2 with a partial break impact behavior. Finally, the toughening mechanism of the supertough PLA based polymers have been established based on the above analysis.

scholarly journals A Facile Fabrication of High Toughness Poly(lactic Acid) via Reactive Extrusion with Poly(butylene Succinate) and Ethylene-Methyl Acrylate-Glycidyl Methacrylate

Polymers ◽  
2018 ◽  
Vol 10 (12) ◽  
pp. 1401 ◽  
Author(s):  
Bin Xue ◽  
Hezhi He ◽  
Zhiwen Zhu ◽  
Jiqian Li ◽  
Zhaoxia Huang ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Methyl Acrylate ◽  
Glycidyl Methacrylate ◽  
Epoxy Group ◽  
Reactive Extrusion ◽  
Poly Lactic Acid ◽  
Hydroxyl Groups ◽  
Butylene Succinate ◽  
Interfacial Compatibility ◽  
Ethylene Methyl Acrylate

As is an excellent bio-based polymer material, poly(lactic acid) (PLA)’s brittle nature greatly restricts its extensive applications. Herein, poly(butylene succinate) (PBS) was introduced to toughening PLA by melt blending using a self-made triple screw extruder through in situ reactive with ethylene-methyl acrylate-glycidyl methacrylate (EGMA). The effect of EGMA concentrations on the mechanical properties, morphology, interfacial compatibility of PLA/PBS blends were studied. Fourier transform infrared (FT-IR) results demonstrated that the epoxy group of EGMA reacts with the hydroxyl groups of PLA and PBS, which proved the occurrence of interfacial reactions among the tri-component. The significantly improved compatibility between PLA and PBS after EGMA incorporation was made evident by scanning electron microscope (SEM) characterization results. Meanwhile, the contact angle test predicted that the EGMA was selectively localized at the interface between PLA and PBS, and the result was verified by morphological analysis of cryofracture and etched samples. The EGMA improves the compatibility of PLA/PBS blends, and consequently leads to a significantly increased toughness with the elongation at break occurring 83 times more when 10 wt % EGMA was introduced than neat PLA, while impact strength also enhanced by twentyfold. Ultimately, the toughening mechanism of PLA based polymers was established based on the above analysis, exploring a new way for the extensive application for degradable material.

scholarly journals Morphology and Properties of Poly(Lactic Acid) and Ethylene-Methyl Acrylate Copolymer Blends with Organoclay

2017 ◽  
Vol 130 ◽  
pp. 07006
Author(s):  
Sirirat Wacharawichanant ◽  
Sirinan Ratchawong ◽  
Phakjira Hoysang ◽  
Manop Phankokkruad
Keyword(s):  
Lactic Acid ◽  
Methyl Acrylate ◽  
Poly Lactic Acid ◽  
Copolymer Blends ◽  
Acrylate Copolymer ◽  
Ethylene Methyl Acrylate
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