Compatibility and phase structure of binary blends of poly(lactic acid) and glycidyl methacrylate grafted poly(ethylene octane)

Su, Zhizhong; Li, Qiuying; Liu, Yongjun; Hu, Guohua; Wu, Chifei

doi:10.1016/j.eurpolymj.2009.04.028

Cited by 199 publications

(61 citation statements)

References 40 publications

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“…The low viscosity of the C series observed at high PA contents was due to the loss of PA chains as demonstrated in titration results and the reduced drag between the PU chains. The solution viscosity of grafted polymers is known to be higher than that of unmodified polymers due to the increased friction resulting from grafted chains or groups [33,34]. The higher viscosity of the UA series compared with that of C series was consistent with the literature results.…”

Section: Cross-link Density and Viscositysupporting

confidence: 92%

Modification of polyurethane by graft polymerization of poly(acrylic acid) for the control of molecular interaction and water compatibility

et al. 2015

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Polyurethane (PU) was graft polymerized with poly(acrylic acid) (PA) to form a PA-grafted PU (UA) series, and a control PU (C) series containing free PA was also prepared for comparison. The grafted PA could be ionized, and an ionized PA-grafted PU (IUA) series was separately prepared. The spectroscopic, thermal, tensile, shape memory, low-temperature flexibility, and water permeability properties of the polymer series were compared. With an increase in the PA content, the T m did not change, but DH m decreased for the UA, IUA, and C series. The T g did not significantly change with the increase in PA content for the UA, IUA, and C series. The tensile strengths of the UA and IUA series sharply increased with the PA content, whereas that of the C series did not. The breaking strain of the UA, IUA, and C series remained the same with the increase in PA content. The shape recovery and shape retention of the PU-PA series remained high after four repeated tests. Finally, the IUA series PU demonstrated better low-temperature flexibility and water compatibility than the unmodified PU.

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Section: Cross-link Density and Viscositysupporting

confidence: 92%

Modification of polyurethane by graft polymerization of poly(acrylic acid) for the control of molecular interaction and water compatibility

et al. 2015

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“…10 Furthermore, it has an epoxy group in its chemical structure which exhibits a large number of chemical reactions by opening of their oxirane ring. Copolymers of GMA have been used for various industrial applications such as nonlinear optics, 11 polymer membranes, 12 bioactive bone cement, 13 paper strength additives, 14 and leather adhesives 15,16 Moreover, GMA grafted polymers such as styrene/acrylonitrile/glycidyl methacrylate copolymer (SAN-GMA), 17 poly (ethylene-glycidyl methacrylate) (EGMA), 18 and glycidyl methacrylate grafted poly (ethylene octane) (GMA-g-POE) 19 can be employed as compatibilizer for promoting the interaction between immiscible phases in the polymer blends. These studies demonstrated an improvement in the mechanical characteristics of polymer by its reactive blending with graft copolymer of GMA.…”

Section: Introductionmentioning

confidence: 99%

Glycidyl methacrylate grafted natural rubber: Synthesis, characterization, and mechanical property

Juntuek

Ruksakulpiwat

Chumsamrong

2011

J of Applied Polymer Sci

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Glycidyl methacrylate (GMA) was grafted onto natural rubber (NR) using emulsion polymerization method. The structures of copolymers were characterized by 1 H nuclear magnetic resonance ( 1 H-NMR), solid state 13 C-NMR spectroscopy, and Fourier transform infrared spectrometer (FTIR). The %grafting obtained from the gravimetric method and the absorbance ratio were compared. Effects of reaction temperature, GMA content, and reaction time on %grafting, grafting efficiency, and %conversion of GMA monomer were determined. Effect of %grafting on mechanical properties of the graft copolymer was studied. Experimental result showed that the appropriate reaction time was 8 h at a reaction temperature of 30 C. Moreover, tensile strength and modulus of the graft copolymer increased with increasing %grafting. However, elongation at break of the graft copolymer decreased with increasing %graft-ing.

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“…A literatura reporta que o anel epóxi presente no metacrilato de glicidila (GMA) pode reagir com grupos hidroxilas e carboxilas, sendo a reação com os grupos carboxila mais reativa do que com os grupos hidroxila. O PLA possui grupos terminais carboxilas e hidroxilas, fazendo do GMA uma alternativa potencial para compatibilização de suas blendas [8,[17][18][19][20][21] . A Figura 1 ilustra as possíveis reações entre o anel epóxi do metacrilato de glicidila e os grupos terminais carboxilas e hidroxilas do PLA [17] .…”

Section: Introductionunclassified

Tenacificação do poli(ácido lático) pela adição do terpolímero (etileno/acrilato de metila/metacrilato de glicidila)

Brito¹,

Agrawal²,

Araújo³

et al. 2012

Polímeros

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Resumo: O poli(ácido lático) é um polímero biodegradável proveniente de fontes renováveis com grande potencial para substituir polímeros não biodegradáveis provenientes do petróleo. Entretanto, seu uso em determinadas aplicações é restringido devido a sua elevada fragilidade e rigidez. Com o intuito de tornar o PLA mais tenaz, o terpolímero (etileno/acrilato de metila/metacrilato de glicidila) -EMA-GMA foi adicionado ao PLA em diferentes concentrações. A adição do EMA-GMA tornou o PLA mais estável durante o processamento. Por FTIR comprovou-se a existência de reação química entre os grupos terminais do PLA e grupos do EMA-GMA. A partir dos ensaios mecânicos observou-se uma resistência ao impacto três vezes superior à do PLA puro. Palavras-chave: Poli(ácido lático), tenacificação, terpolímero.Toughening of Polylactide by Melt Blending with an (Ethylene/Methyl Acrylate/Glycidyl Methacrylate) Terpolymer Abstract: The Poly(lactic acid) is a biodegradable polymer from renewable sources with potential to replace non-biodegradable polymers derived from petroleum. However its use is restricted in certain applications due to its high brittleness and rigidity. In order to make the PLA more tenacious, the terpolymer (ethylene/methyl acrylate/glycidyl methacrylate) -EMA-GMA was added to PLA in different concentrations. The addition of EMA-GMA to PLA turned the blends more stable during processing. The FTIR data confirmed the chemical reaction between groups in PLA and the EMA-GMA. A three fold increase was observed in the impact strength compared to pure PLA. Keywords: Poly(lactic acid), toughening, terpolymer. IntroduçãoO uso e o descarte indevidos dos materiais plásticos, aliados a sua resistência a degradação acabam gerando problemas ambientais sérios [1] . Por este motivo, polímeros biodegradáveis têm atraído grande atenção no mundo inteiro, tanto do ponto de vista científico como tecnológico [2] . Alguns desses polímeros possuem propriedades que possibilitam sua aplicação em produtos confeccionados a partir de polímeros provenientes do petróleo [3] . Características como durabilidade durante o uso e degradabilidade após o descarte tornam esses materiais uma classe atraente, pois possibilita minimizar problemas ambientais e ao mesmo tempo atender às exigências do mercado, assim, muito se têm investido nessa nova classe de polímeros [4] . O poli(ácido lático) -PLA é um poliéster alifático produzido por síntese química a partir de ácido láctico obtido por fermentação bacteriana de glicose extraída do milho, fonte renovável. O mesmo é um polímero termoplástico, semicristalino ou amorfo, biocompatível e biodegradável, com uso potencial na confecção de embalagens, itens de descarte rápido, fibras têxteis e diversas aplicações na área médica [5][6][7] . Entretanto, o PLA possui elevada fragilidade e rigidez o que o impede de ser utilizado em algumas aplicações [8,9] . A maneira mais prática e econômica de superar a fragilidade e rigidez do PLA é pela confecção de blendas por fusão [8] . Desta forma, blendas de PLA com diverso...

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Compatibility and phase structure of binary blends of poly(lactic acid) and glycidyl methacrylate grafted poly(ethylene octane)

Cited by 199 publications

References 40 publications

Modification of polyurethane by graft polymerization of poly(acrylic acid) for the control of molecular interaction and water compatibility

Modification of polyurethane by graft polymerization of poly(acrylic acid) for the control of molecular interaction and water compatibility

Glycidyl methacrylate grafted natural rubber: Synthesis, characterization, and mechanical property

Tenacificação do poli(ácido lático) pela adição do terpolímero (etileno/acrilato de metila/metacrilato de glicidila)

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