Using organoclay to promote morphology refinement and co-continuity in high-density polyethylene/polyamide 6 blends – Effect of filler content and polymer matrix composition

Filippone, Giovanni; Dintcheva, Nadka Tzankova; Mantia, Francesco Paolo La; Acierno, Domenico

doi:10.1016/j.polymer.2010.06.044

Cited by 87 publications

(92 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The presence of PPgMA increases clay dispersion (with partial exfoliation, as further proved by XRD analysis which will be described in the following) and should therefore improve the mechanical properties, but its high amount and its chemical incompatibility leads to the formation of heterogeneities (grey in the drawings) consisting in PPgMA with some clay particles at the inside. The considerations about selective disposition of the clay platelets and stakes, especially into the more polar phase, within the incompatible polymer blends, have been also made on the base of our previous studies [28,29]. This can also help in explaining the reduction of the tensile strength and the elongation at break upon increasing the PPgMA content, as already pointed out in the discussion about the mechanical properties (Figures 1b and 1c), in spite of the improved filler dispersion.…”

Section: Resultsmentioning

confidence: 77%

Accelerated weathering of PP based nanocomposites: Effect of the presence of maleic anhydryde grafted polypropylene

Morreale¹,

Dintcheva²,

Mantia³

2013

Express Polym. Lett.

View full text Add to dashboard Cite

The use of nanometric-scale sized fillers for the preparation of thermoplastic polymer composites is of topical interest in the academia, because of the significant improvements achievable in terms of technological properties, such as the elastic modulus, the tensile strength, the barrier properties, the flexural modulus [1][2][3][4][5][6][7][8]. These enhancements are promising and attracting also the interest from industrial world, in sight of several applications which could benefit from them. On the other hand, it is known [3] that polymer based nanocomposites have been struggling to conquer mainstream volume market shares, and this can be attributed to some weaknesses. One of these is represented by their environmental stability, especially when outdoor applications (i.e. furnishing, building, packaging, automotive) are concerned. It is known from the literature that polymer/silicate nanocomposites can show significant effects due to photo-oxidation (in particular, higher photo-oxidation rates and thus reduction of the mechanical prop- Abstract. Polymer nanocomposites are currently a topic of great interest. The increasing importance they are gaining also in the standpoint of industrial applications, is giving concerns regarding their environmental stability and, in general, their behaviour in outdoor applications, under direct solar irradiation. Papers available in the literature have highlighted the different influences of different nanosized fillers, in particular clay-based nanofillers; however, few data are available regarding other nanosized fillers. Furthermore, the research on polymer nanocomposites has clearly pointed out that the use of compatibilizers is required to improve the mechanical performance and the dispersion of polar fillers inside apolar polymer matrices, especially when complex mechanisms such as intercalation and exfoliation, typical of clay-filled nanocomposites, are involved. In this work, the photo-oxidation behaviour of polypropylene/clay and polypropylene/calcium carbonate nanocomposites containing different amounts of maleic anhydride grafted polypropylene (PPgMA) and subjected to accelerated weathering, was investigated. The results showed significant differences between the two nanofillers and different degradation behaviours in presence of the compatibilizer. In particular, PPgMA modified the dispersion of the nanofillers but, on the other hand, higher amounts proved to lead to the formation of some heterogeneities. Furthermore, PPgMA proved to positively affect the photo-oxidation behaviour by decreasing the rate of formation of the degradation products.

show abstract

Section: Resultsmentioning

confidence: 77%

Accelerated weathering of PP based nanocomposites: Effect of the presence of maleic anhydryde grafted polypropylene

Morreale¹,

Dintcheva²,

Mantia³

2013

Express Polym. Lett.

View full text Add to dashboard Cite

show abstract

“…The addition of small quantities of a commercial polyimide substantially improved the HDT and the glass transition temperatures of PA6/clay nanocomposites. The water absorption and hygrothermal aging behavior of PA6/PP/organoclay/MAH-g-PP nanocomposites was studied at three different temperatures (30,60, and 90°C). The equilibrium moisture content and the diffusion coefficient were dependent on the OMMT loading, MAH-g-PP concentration, and immersion temperatures.…”

Section: 3mentioning

confidence: 99%

“…In general the mechanical properties of a polymer blend based nanocomposite can be controlled by the nanofiller induced co-continuous morphology. It is believed that stable co-continuity can form provided that the interfacial tension between the filled and the unfilled polymer phase is balanced by the stress bearing ability of the nanoparticle network [59][60][61][62]. In most of the research studies, the degree of the diameter decrease of the dispersed phase was demonstrated to be dependent on the content and type of the polymeric (organic) compatibilizer (e.g., maleic anhydride-grafted compatibilizer).…”

mentioning

confidence: 99%

Polyamide blend-based nanocomposites: A review

Chow¹,

Ishak

2015

Express Polym. Lett.

View full text Add to dashboard Cite

“…Por outro lado, a morfologia da mistura PEA73 (Figura 6d) exibiu uma extensão considerável de continuidade de fase, morfologia elipsoidal, significando que a forma irregular da fase dispersa, promovida pela carga APO resultou em um maior grau de interpenetração das fases. Comportamento semelhante foi reportado na literatura [32] . A mistura PEPA91 (Figura 6e), mistura contendo PP-g-MA e APO, apresentou uma fase dispersa com menor tamanho de partícula e com uma menor quantidade de vazios quando comparada com a mistura PEA91 (Figura 6c), indicando que a mistura PP-g-MA/APO impede a coalescência e aglomeração das partículas de EPDM.…”

Section: Microscopia Eletrônica De Varredura (Mev)unclassified

Uso de argila organofílica na compatibilização de misturas PP/EPDM

Ferreira¹,

Leite

Siqueira

et al. 2011

Polímeros

View full text Add to dashboard Cite

Resumo: Misturas PP/EPDM com variadas razões PP:EPDM, não compatibilizadas e compatibilizadas com o polipropileno modificado com anidrido maleico (PP-g-MA), foram preparadas por fusão. A influência da adição de 1 pcr de uma argila bentonita na morfologia, propriedades mecânicas e reológicas destas misturas foi avaliada. A bentonita empregada como carga, proveniente da Bentonit União Nordeste/PB foi purificada e modificada organicamente com tecnologia desenvolvida por nosso grupo de pesquisa, antes de ser adicionada às misturas. Os dados de difratometria de raios X mostraram que, para diferentes razões de PP:EPDM na mistura a incorporação de 1 pcr de argila organofílica resultou na formação de nanocompósitos intercalados desordenados (20 ou 40% de EPDM) ou intercalados/ esfoliados (10 e 30% EPDM). A incorporação da argila organofílica provocou alterações nas propriedades morfológicas, mecânicas e reológicas das misturas, especialmente daquelas preparadas com 30% em massa de EPDM onde a ação compatibilizante da argila foi observada. Palavras-chave: Blendas PP/EPDM, argila organofílica, compatibilização. The Use of an Organoclay on the Compatibilization of PP/EPDM BlendsAbstract: PP/EPDM blends with different PP:EPDM ratios, non-compatibilized and compatibilized with maleic anhydride grafted polypropylene (PP-g-MA) were prepared by melting. The influence of 1 phr bentonite clay addition on the morphology, mechanical and rheological properties of these blends was evaluated. The bentonite used as a filler, provided by Bentonit União Nordeste/PB, was purified and organically modified with a technology developed by our research group, before being added to the blends. X-ray diffraction results showed that, for blends having different PP:EPDM ratios, 1 phr organoclay addition led to the formation of intercalated (20 or 40% EPDM) or intercalated/exfoliated (10 and 30% EPDM) nanocomposites. The morphological, mechanical and rheological properties of the blends were modified by organoclay addition, especially for those with 30 wt% of EPDM, where a compatibilizing effect of the organoclay was observed. Keywords: PP/EPDM blends, organoclay, compatibilization. IntroduçãoO desenvolvimento de misturas (blendas) poliméricas é de grande interesse acadêmico e industrial por ser uma prática relativamente simples de criar materiais com propriedades desejadas [1,2] . A mistura de polipropileno (PP) com elastômeros visa melhorar sua resistência ao impacto (tenacidade) a baixas temperaturas. Vários elastômeros são usados como modificadores de impacto para o PP, incluindo poliisobutileno [3] , copolímero em bloco de estireno-butadieno [4] , poliisopreno [5] e borracha natural [6] , mas os copolímeros de etileno-propileno (EPR) [7] e os terpolímeros de etileno-propileno-dieno (EPDM) [8][9][10][11] têm sido mais eficientes para esta aplicação.Estudos reportados na literatura têm mostrado que a incorporação do EPDM ao PP resulta na obtenção de PP tenacificado, também denominado poliolefina termoplástica (TPO). Contudo, algumas propriedades...

show abstract

Using organoclay to promote morphology refinement and co-continuity in high-density polyethylene/polyamide 6 blends – Effect of filler content and polymer matrix composition

Cited by 87 publications

References 39 publications

Accelerated weathering of PP based nanocomposites: Effect of the presence of maleic anhydryde grafted polypropylene

Accelerated weathering of PP based nanocomposites: Effect of the presence of maleic anhydryde grafted polypropylene

Polyamide blend-based nanocomposites: A review

Uso de argila organofílica na compatibilização de misturas PP/EPDM

Contact Info

Product

Resources

About