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The effect of the addition of poly(styrene‐ co ‐glycidyl methacrylate) copolymer on the properties of polylactide/poly(methyl methacrylate) blend
Author(s) -
Anakabe Jon,
Zaldua Huici Ane Miren,
Eceiza Arantxa,
Arbelaiz Aitor
Publication year - 2016
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.43935
Subject(s) - materials science , copolymer , glycidyl methacrylate , ultimate tensile strength , differential scanning calorimetry , composite material , methyl methacrylate , thermal stability , glass transition , izod impact strength test , dynamic mechanical analysis , polymer chemistry , chemical engineering , polymer , physics , engineering , thermodynamics
The effect of the addition of poly(styrene ‐co‐ glycidyl methacrylate) P(S ‐co‐ GMA) copolymer on the properties of melt blended polylactide/poly(methyl methacrylate) (PLA/PMMA) 80/20 (wt %) composition was studied. In the literature high ductility levels were achieved by melt blending PLA with different additives. However, the gained ductility was counter balanced with drastic drops in strength and modulus values. The novelty of this work was the preparation of PLA‐based blends with polylactide content higher than 75 wt % which showed an impact resistance value improvement of about 60% compared with the neat PLA and maintained similar tensile strength and modulus values as well as glass transition temperature to neat PLA. The addition of only 3 pph of copolymer to PLA/PMMA blend improved the impact resistance almost 100%. The chemical reaction between PLA/PMMA blend and P(S ‐co‐ GMA) copolymer were analyzed by FTIR, rotational rheometry, and GPC/SEC. Phase structure and morphology were studied by Differential Scanning Calorimetry and Scanning Electronic Microscopy. Tensile and impact properties as well as thermal stability were also studied. Results showed that as the amount of copolymer in the blend was increased then higher was average molecular weight and polydispersity index. After the addition of P(S ‐co‐ GMA) copolymer to the PLA/PMMA blend the impact resistance, elongation at break and thermal stability were improved while tensile strength and elastic modulus remained almost unaltered. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016 , 133 , 43935.