Relaxation behavior of polymer blends with complex morphologies: Palierne emulsion model for uncompatibilized and compatibilized PP/PA6 blends

Shi, Dean; Hu, Guohua; Ke, Zhuo; Li, Robert K.Y.; Yin, Jie

doi:10.1016/j.polymer.2006.04.058

Cited by 56 publications

(43 citation statements)

References 47 publications

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“…Já nas membranas PA6/PPgMA (Figura 4d), a morfologia apresenta-se semelhante àquela anteriormente citada. Porém, elas não apresentaram a presença de domínios de PP, indicando que o PP funcionalizado com anidrido maléico possivelmente reagiu com os grupos terminais da PA6 [5,15,16,[24][25][26][27] . Nas Figuras 4e e 4f encontram-se as membranas obtidas a partir do sistema ternário.…”

Section: Seção Transversal Das Membranasunclassified

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Obtenção e Caracterização de Membranas Obtidas a Partir de Blendas Poliméricas de Poliamida 6

Bezerra¹,

Leite²,

Araújo³

et al. 2014

Polímeros

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Resumo: A mistura de polímeros diferentes possibilita a obtenção de novos materiais com propriedades, na maioria das vezes superiores às dos componentes puros. Essa mistura vem sendo utilizada e aplicada na obtenção de membranas com intuito de melhorar as propriedades de barreira para que se possa separar duas fases restringindo total ou parcialmente o transporte de uma ou várias espécies químicas presentes. Neste trabalho, membranas poliméricas foram obtidas a partir de blendas de poliamida 6 (PA6), polipropileno (PP) e compatibilizantes pelo método de inversão de fases, com a finalidade de serem utilizadas em processos de separação, purificação, fracionamento e contração. Estas foram estudadas por difração de Raios-X (DRX), calorimetria exploratória diferencial (DSC) e microscopia eletrônica de varredura (MEV). Os resultados de DRX evidenciaram a presença dos picos característicos de reflexão da PA6, PP e dos compatibilizantes. Por DSC, observou-se que a presença do compatibilizante não promoveu alterações significativas na cristalinidade da PA6. Por meio das fotomicrografias de MEV, visualizou-se a obtenção de membranas microporosas assimétricas, como também percebeu-se que a presença da segunda fase na PA6 modificou a morfologia das membranas. Palavras-chave: Membranas, blendas, poliamida 6. Preparation and Characterization of Membranes Obtained from Polymer Blends of Polyamide 6Abstract: The mixture of different polymers enables obtaining new materials with properties most often superior to those of the pure components. This mixture is being used and applied in obtaining membranes with a view to improving the barrier properties, so that it can separate two phases wholly or partially, restricting the transport of one or more chemical species. In this work, polymer membranes were obtained from blends of polyamide 6 (PA6) and polypropylene (PP), compatibilizing by the method of phase inversion, for being used in processes of separation, purification, fractionation and contraction. These were studied by X-ray diffraction (XRD), differential scanning calorimetry (DSC) and scanning electron microscopy (SEM). XRD results showed the presence of peaks characteristic of PA6, PP and compatibilizers. For DSC, it was observed that the presence of the compatibilizer did not cause significant changes in crystallinity of PA6. Through the SEM photomicrographs is confirmed the production of asymmetric microporous membranes and the presence of the second modified PA6 phase in the morphology of the membranes is also noted. Keywords: Membranes, blends, polyamide 6. IntroduçãoA mistura de dois ou mais polímeros (blendas poliméricas) é uma das táticas de desenvolvimento de novos materiais com características diferentes daquelas dos polímeros puros, além de apresentar baixo custo, quando confrontado à síntese de novos polímeros [1][2] . Essa mistura de polímeros tem como resultado mais frequente um sistema multifásico, devido à falta de afinidade química entre eles. Neste caso, as blendas são imiscíveis e apresentam característica...

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Section: Seção Transversal Das Membranasunclassified

“…Já as membranas com PPgMA (Figura 4f), pode-se observar a formação de uma pele filtrante mais fina e a camada porosa com poros bem distribuídos e aparentemente bem dispersos e homogêneos. Isto pode ser atribuído a uma melhor interação do agente compatibilizante com a matriz e a segunda fase [5,15,16,27] .…”

Section: Seção Transversal Das Membranasunclassified

Obtenção e Caracterização de Membranas Obtidas a Partir de Blendas Poliméricas de Poliamida 6

Bezerra¹,

Leite²,

Araújo³

et al. 2014

Polímeros

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“…Blends of PP with PA6 combining properties of both components have been of considerable interest due to that the blends can overcome their drawbacks and would lead to materials with improved performances [1][2][3][4]. However, the blending of PP and PA6 usually leads to immiscibility, and the desired properties cannot be achieved without a third component, i.e.…”

Section: Introductionmentioning

confidence: 99%

“…So far, however, one successful approach of compatibilization for PP/PA6 blends is to use polypropylene grafted with maleic anhydride (PP-g-MAH) as a compatibilizer [2][3][4][9][10][11]. There are very few studies where a quite fine dispersion of the minor phase in the matrix can be achieved by using ionomers, polypropylene-grafted-acrylic acid, ethylene-butylene acrylate-grafted-fumaric acid, ethylene-ethyl acrylate-glycidyl methacrylate as compatibilizers [12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Effects of polypropylene-g-dibutyl maleate on mechanical and rheological properties of PP/PA6 blends

Jia

2009

E-Polymers

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Abstract:The effects of polypropylene-grafted-dibutyl maleate (PP-g-DBM) used as compatibilizer on mechanical, rheological and morphological properties of polypropylene (PP) and nylon 6 (PA6) blends was systematically investigated in this paper. The results of Molau test, solvent extraction and differential scanning calorimetry (DSC) indicated the formation of PP-g-PA6 in vicinity of interfaces during melting extrusion. Owing to the reaction between the reactive groups of PPg-DBM and amine (-NH 2 ) end groups of PA6, the tensile and impact strength of the PP-g-DBM compatibilized PP/PA6 blends were much higher than that of the uncompatibilized PP/PA6 blends. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) results indicated that the domain sizes of the dispersed phase in the compatibilized PP/PA6 blends decreased and the interfaces become more indistinct, which indicated a clear compatibiliting effect was induced by the PP-g-DBM in the immiscible PP/PA6 blends, i.e. the PP-g-DBM was an effective compatibilizer for the PP/PA6 blends. In addition, the rheological measurements showed the PP-g-DBM compatibilized PP/PA6 blends possessed higher pseudo plasticity, melt viscosity and flow activation energy.

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“…Konpatibilizatzailea gehitzean, tanten tamaina 4 aldiz murrizten da 4. irudian eta 1. taulan ikus daitekeen moduan. Sarreran aipatu bezala, konpatibilizatzaileek tentsio interfaziala murrizten dute kantitate txikienean dagoen fasearen dispertsioa erraztuz [12][13][14]. Nanosilika hidrofobikoaren gehikuntzak tanten tamainaren murrizketa areagotzen du, konpatibilizatzailea duen nahastearekin alderatuta tamaina erdira jaisten delarik.…”

Section: Morfologiaunclassified

Polipropileno/poliamida nahasteen konpatibilizazioa: azterketa morfologiko eta erreologikoa

Sangroniz¹,

Palacios²,

Fernández³

et al. 2018

EKAIA

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Laburpena: Polipropileno/Poliamida (PP/PA) nahasteak prestatu dira eta kopolimerokonpatibilizatzailea eta nanosilika gehitzeak nahaste horietan duen eragina aztertu da. Azterketa mikroskopikoak erakusten duenez, nahasteek emultsio antzeko morfologia dute, polipropilenoak fase jarraitua osatzen duelarik. Konpatibilizatzailea zein nanosilika gehitzeak PA tanten tamaina nabarmen murrizten duela antzematen da. Nahaste bitarrak fluxu jarraitu baten eraginpean daudenean, PA tanten koaleszentzia gerta daiteke eta, ondorioz, tanten tamaina handitu egiten da. Kopolimeroa zein nanosilika daukaten nahasteen kasuan, ordea, morfologia ez da eraldatzen fluxuaren eraginez. Fluxu oszilakorrak burutu dira nahaste desberdinen ezaugarri biskoelastikoak lortzeko. Neurketa biskoelastikoen bidez lortzen diren erlaxazio-espektroen azterketak morfologian gertatutako aldaketak detektatzeko gai direla frogatzen da.Hitz gakoak: polimero-nahasteak, konpatibilizatzailea, nanosilika, morfologia, koaleszentzia, erlaxazio mekanikoak.Abstract: Polypropylene/Polyamide (PP/PA) blends have been prepared and the effect of adding compatibilizer copolymer and nanosilica to the blends has been studied. Microscopic analysis shows that the blends exhibit an emulsion-like morphology, with polypropylene as a continuous phase. The addition of a compatibilizer, as well as nanosilica particles, reduces significantly the size of PA droplets. When the binary blend is submitted to a continuous flow, coalescence of PA droplets may occur, which leads to

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Relaxation behavior of polymer blends with complex morphologies: Palierne emulsion model for uncompatibilized and compatibilized PP/PA6 blends

Cited by 56 publications

References 47 publications

Obtenção e Caracterização de Membranas Obtidas a Partir de Blendas Poliméricas de Poliamida 6

Obtenção e Caracterização de Membranas Obtidas a Partir de Blendas Poliméricas de Poliamida 6

Effects of polypropylene-g-dibutyl maleate on mechanical and rheological properties of PP/PA6 blends

Polipropileno/poliamida nahasteen konpatibilizazioa: azterketa morfologiko eta erreologikoa

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