Grafting of maleic anhydride on poly(L-lactic acid). Effects on physical and mechanical properties

Hwang, Sung Wook; Lee, Sang Bong; Lee, Chang Kee; Lee, Jun Young; Shim, Jin Kie; Selke, Susan; Soto‐Valdez, Herlinda; Matuana, Laurent M.; Rubino, Maria; Auras, Rafael

doi:10.1016/j.polymertesting.2011.12.005

Cited by 124 publications

(112 citation statements)

References 28 publications

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“…1, we superposed the spectrum of pure PLA to those of PLA0.18 and PLA0.40. Focusing on the carbonyl absorption peak of PLA at 1760 cm −1 , the shoulder at 1785 cm −1 appeared on the grafted polyester, and was assigned to the symmetric stretching of the carbonyl functions of maleic anhydride, confirming thus the grafting of MA onto PLA (John et al, 1997;Hwang et al, 2012).…”

Section: Characterization Of Plagmamentioning

confidence: 81%

“…The PLA was melted for 2 min and then DCP (0.2 mass %) as a free radical initiator was added and mixed for 3 min. The modification reaction with the MA (0.3 to 3 mass %) continued during mixing for another 5 min (Hwang et al, 2012).…”

Section: Preparation Of the Samplesmentioning

confidence: 99%

“…The exfoliation is achieved and the mechanical properties are improved (Petersson et al, 2006). PLAgMA can be obtained by one step reactive extrusion using peroxide initiator and maleic anhydride (Carlson et al, 1999;Raquez et al, 2008;Hwang et al, 2012). The desired graft content can be controlled by the peroxide initiator and MA ratio to promote grafting efficiency.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effect of the montmorillonite intercalant and anhydride maleic grafting on polylactic acid structure and properties

Issaadi

Habi

Grohens

et al. 2015

Applied Clay Science

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Section: Characterization Of Plagmamentioning

confidence: 81%

Section: Preparation Of the Samplesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effect of the montmorillonite intercalant and anhydride maleic grafting on polylactic acid structure and properties

Issaadi

Habi

Grohens

et al. 2015

Applied Clay Science

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“…The dichloromethane-insoluble product that remained on the cheesecloth was washed using acetone to remove the unreacted MA and was then dried in a vacuum oven at 80 C for 24 h. The dichloromethane-soluble product in the filtrate was extracted using 600 mL of cold acetone; this extraction was repeated five times. The percentage of grafted polymer was determined using a titration method, 22 which showed that the grafting percentage was approximately 0.98 wt %. BPO and MA loadings were maintained at 0.3 wt % and 10 wt %, respectively.…”

Section: Pbs-g-ma Copolymermentioning

confidence: 99%

Characterization and biocompatibility of chestnut shell fiber–based composites with polyester

Hsu

Liao

et al. 2014

J of Applied Polymer Sci

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The structural, mechanical, biocompatibility, and biodegradability properties of composite materials formed of poly(butylene succinate) (PBS) and natural fiber (chestnut shell fiber; CSF) were evaluated. Maleic anhydride-grafted poly(butylene succinate) (PBS-g-MA) and treated (crosslinked) CSF (TCSF) were used to improve the mechanical properties of PBS/CSF composites. The results show that PBS-g-MA/TCSF composites have superior mechanical properties compared with both pure PBS and PBS/CSF composites, which is attributed to better compatibility between the polymer and TCSF. Normal human foreskin fibroblasts (FBs) were seeded onto these two series of composites to characterize the biocompatibility. FB proliferation, collagen production, and cytotoxicity assays on the PBS/CSF series of composites exhibited superior results compared with those on the PBS-g-MA/TCSF composites. PBS-g-MA/TCSF was found to be more water resistant than PBS/CSF, and the weight loss of both the composites buried in soil compost indicated that both were biodegradable, especially at high levels of CSF substitution.

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“…Esperar-se-ia que a adição de um agente compatibilizante pudesse impactar no decréscimo da Tg e no grau de cristalinidade (Xc) do material [38,40] . Entretanto, não houve uma diminuição pronunciada da Tg, o que também poderia ser um indicativo da baixa interação fibra/matriz polimérica.…”

Section: -Desenvolvimento E Caracterização De Compósitos Poliméricos unclassified

Desenvolvimento e Caracterização de Compósitos Poliméricos à Base de Poli(Ácido Lático) e Fibras Naturais

Lemos¹,

Martins²

2014

Polímeros

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Resumo: O presente trabalho busca avaliar o comportamento de compósitos que contêm em sua formulação um biopolímero originário de indústrias da agricultura sustentável. O biopolímero selecionado, poli(ácido lático), (PLA) e um polímero termoplástico (poliuretano), (TPU), foram misturados a fibras naturais (madeira e coco). Em um primeiro momento, foram preparadas formulações contendo 10, 20 e 30% em massa de fibra vegetal em relação à blenda de PLA-TPU (na proporção de 70/30% em massa). Em um segundo momento, manteve-se a mesma proporção em massa de fibra vegetal em relação à blenda de PLA-TPU, porém foram adicionados 5% em massa de anidrido maleico. Na sequência, as formulações foram avaliadas através de caracterizações físico-mecânicas, térmicas e microscópica. De um modo geral, as análises mostraram evidências bastante conclusivas sobre a baixa adesão interfacial entre a blenda polimérica e as fibras vegetais. Deve-se salientar a fraca atuação do anidrido maleico como agente de acoplamento, haja vista que as formulações que o continham não apresentaram melhoras em suas propriedades. Portanto, os resultados indicam que os biocompósitos formulados possam atender à necessidade de nichos específicos de mercados populares, como o de decoração, os quais não demandam alto desempenho de seus produtos, viabilizando o uso de fibras vegetais devido à redução de custo do compósito final. Palavras-chave: Biopolímero, poli(ácido lático), compósitos poliméricos, fibras vegetais. Development and Characterization of Polymeric Composites Based on Poly (Lactic Acid) and Natural FibersAbstract: This work evaluates the behavior of composites containing a biopolymer derived from sustainable agriculture industries. The biopolymer selected, poly(lactic acid) -PLA -, in combination with a thermoplastic polymer (polyurethane) -TPU -was mixed with natural fibers, wood and coconut. In a first step, formulations containing 10, 20 and 30% by weight of fiber in relation to the blend of PLA-TPU (in the ratio 70/30 wt%) were prepared. In the second step, the same set of formulations was maintained but with addition of 5 wt% of the coupling agent maleic anhydride. These composites were characterized by means of physical-mechanical, thermal and microscopic techniques. The results indicated a low interfacial bonding between the polymeric blend and the vegetal fibers. It is important to emphasize the poor performance of the coupling agent, because the formulations containing maleic anhydride did not show any improvement in their properties in comparison to the standard material. Therefore, the biocomposites studied in this paper can be used when high-performance materials are not required, as in home decoration articles, making it feasible to use vegetal fibers in order to reduce the cost of the final composite. Keywords: Biopolymer, poly(lactic acid), polymeric composites, vegetal fibers. IntroduçãoMuito tem sido discutido sobre as principais políticas de gestão de resíduos de materiais utilizados na indústria em geral, porém, a maior reflexão ...

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Grafting of maleic anhydride on poly(L-lactic acid). Effects on physical and mechanical properties

Cited by 124 publications

References 28 publications

Effect of the montmorillonite intercalant and anhydride maleic grafting on polylactic acid structure and properties

Effect of the montmorillonite intercalant and anhydride maleic grafting on polylactic acid structure and properties

Characterization and biocompatibility of chestnut shell fiber–based composites with polyester

Desenvolvimento e Caracterização de Compósitos Poliméricos à Base de Poli(Ácido Lático) e Fibras Naturais

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