Crystal phase and crystallinity of polyamide 6/functionalized polyolefin blends

Psarski, Maciej; Pracellà, Mariano; Gałęski, Andrzej

doi:10.1016/s0032-3861(99)00720-x

Cited by 72 publications

(61 citation statements)

References 17 publications

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“…Regarding the blends, first of all, it is possible to point out that although it is described in the literature that the incorporation of ionic groups so as to favor specific and favorable interactions, 17 such as ion-ion bonds, 18 have proved to be a useful route to achieve polymer compatibilization, 19 in our case, same as in nonsulfonated blends, we observe the T g corresponding to each of the constituents of the blends. This fact indicates that as result of sulfonation reaction, no changes are observed and these blends, from a thermal point of view, behave as incompatible.…”

mentioning

confidence: 69%

Proton conducting blends based on polysulfones and elastomers

Linares

Acosta

Rodríguez

2006

J of Applied Polymer Sci

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ABSTRACT:With the aim of improving the performance of conventional proton conducting membranes, systems based on two poly(arylene ether sulfone)s and two elastomers were obtained by heterogeneous sulfonation with chlorosulfonic acid. Subsequently, they were characterized, morphologically and electrically, by techniques such as infrared spectroscopy (FTIR), differential scanning calorimetry, dynamic-mechanical analysis, and complex impedance spectroscopy. From the results, it was verified that the reaction of sulfonation had taken place, as well as that these materials formed incompatible and good proton conducting blends. In addition, the storage modulus and the conductivity were subjected to a statistical design to predict the optimum composition, presenting the best mechanical and conducting proton values and as a consequence the most suitable membrane from the point of view of its application in the field of the fuel cells. Very promising results have been found especially with membranes based on binary blends constituted by thermoplastic/elastomer polymers.

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mentioning

confidence: 69%

Proton conducting blends based on polysulfones and elastomers

Linares

Acosta

Rodríguez

2006

J of Applied Polymer Sci

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“…However a careful examination shows that in the reactive blends, the PA6 component presents some slight changes in the intermediate region between the (200) and the (002) reflections due to the a-structure of PA6. [46] In this intermediate region, 21 8 a 2h a 23 8, the corresponding reflections for the c-form are located. It was found that in both blend compositions, the PA6 component of the reactive blend presented a less pronounced valley between the two a-form reflections, thus indicating a possible weak growth of the c-form of the PA6 when it was blended with ULDPE-graft-DEM.…”

Section: Methodsmentioning

confidence: 94%

Compatibility Studies in Binary Blends of PA6 and ULDPE-graft-DEM

Sánchez

Rosales

Laredo

et al. 2001

Macromol. Chem. Phys.

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“…A T m2 corresponde ao surgimento de um pico de fusão que ficou na faixa dos 214-216 °C. Este pico, já relatado na literatura [18,33] esta associado à formação da fase cristalina γ na PA6. Este fenômeno foi discutido por alguns autores [34][35][36] , que relataram que a incorporação de argila organofílica em PA6 favorece a estrutura cristalina γ em detrimento à fase α da PA6 pura.…”

Section: Análise Da Cristalinidade Por Dscunclassified

Efeito da Montmorilonita Organifílica na Compatibilização e nas Propriedades Morfológicas, Mecânicas e Térmicas de Blendas de PA6/ PEBD

Coelho¹,

Morales²

2013

Polímeros

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Resumo: Blendas imiscíveis de poliamida 6 e polietileno de baixa densidade foram preparadas com e sem a presença de polietileno enxertado com anidrido maleico como compatibilizante. Montmorilonita organofílica foi incorporada nas blendas por intercalação do fundido. Análises morfológicas e estruturais apresentaram boa dispersão da argila, com a obtenção de estruturas intercaladas e esfoliadas. A separação de fases foi observada nas amostras, e tanto o compatibilizante como a argila causaram redução no tamanho dos domínios. Esta estrutura proporcionou uma melhora significativa nas propriedades mecânicas das blendas, revelando o efeito de reforço causado pela argila. O módulo elástico e a tensão máxima aumentaram em até 300% e 100%, respectivamente. O efeito da compatibilização da argila foi positivo. Pelas análises de DSC pode-se observar o surgimento de um pico na região de fusão da PA6 atribuído à formação de uma nova fase cristalina devido à presença de argila. Palavras-chave: Nanocompósitos, blendas, montmorilonita, polietileno, poliamida. The Effect of Organophilic Montmorillonite on Compatibilization, Morphology and Mechanical and Thermal Properties of PA6/ LDPE BlendsAbstract: Immiscible blends of polyamide 6 and low density polyethylene were prepared with and without maleic anhydride grafted polyethylene used as a compatibilizer. Organophilic montmorillonite was incorporated in the blends by melt intercalation. Morphological and structural analysis showed good clay dispersion with partially exfoliated and intercalated structures. Phase separation was observed and domains size reduction was induced by the clay and the compatibilizer. Improvement on mechanical properties of compounds was observed, showing the reinforcing effect caused by the clay. Elastic modulus and tensile strength have increased up to 300% and 100%, respectively. The clay showed a positive effect on compatibilization. DSC analysis revealed a new melting peak for PA6 assigned to a new crystalline phase due the clay effect.

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Crystal phase and crystallinity of polyamide 6/functionalized polyolefin blends

Cited by 72 publications

References 17 publications

Proton conducting blends based on polysulfones and elastomers

Proton conducting blends based on polysulfones and elastomers

Compatibility Studies in Binary Blends of PA6 and ULDPE-graft-DEM

Efeito da Montmorilonita Organifílica na Compatibilização e nas Propriedades Morfológicas, Mecânicas e Térmicas de Blendas de PA6/ PEBD

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