Fractionated crystallization of dispersed PA6 phase of PP/PP‐<i>g</i>‐MAH/PA6 blends

Shi, Dean; Yin, Jie; Ke, Zhuo; Gao, Ying; Li, R. Ky

doi:10.1002/app.13524

Cited by 20 publications

(10 citation statements)

References 31 publications

(58 reference statements)

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“…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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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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“…6 shows the crystallization behaviors of the PA6 in the PA6/PS (40/60 wt/wt) blends with different morphologies. The PA6 in the PA6/(PS + hSMA2) (40/60 wt/wt) blend shows a typical fractionated crystallization behavior, corresponding to a droplet-in-matrix morphology [55]. However, the PA6 in the PA6/PSMA2 blend crystallize at its normal crystallization temperature and no fractionated crystallization behavior is observed.…”

Section: Resultsmentioning

confidence: 96%

Effect of a dual compatibilizer on the formation of co-continuous morphology of immiscible po`lymer blends

Shi

Wang

et al. 2016

Materials & Design

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“…Indeed, unfilled NR/PB blends already exhibit a significant amount of dispersed droplets of PB in a matrix of NR [31]. It is well known that blends consisted of a crystallizable dispersed phase in an amorphous matrix can show fractionated crystallization [25,[32][33][34][35]. This phenomenon is explained by the fact that, at a given supercooling, the number of heterogeneous nuclei from which the crystallization could be developed can be smaller than the number of droplets.…”

Section: Blends Containing More Than 50 Wt% Of Nrmentioning

confidence: 99%

Quantification of the distribution of carbon black in natural rubber/polybutadiene blends by differential scanning calorimetry

Portal

Carrot

Majesté

et al. 2009

Polymer Engineering & Sci

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The distribution of carbon black (CB) in uncured blends of natural rubber (NR) and polybutadiene (PB) can be quantified using DSC. The crystallization temperature of PB containing CB, measured during cooling from the melt, increases with the CB loading. This phenomenon was used to calculate the CB content in PB and conversely in NR in NR/PB/CB mixtures. Two different blends containing N550 CB were studied. A deeper analysis was performed over the entire composition range of NR/PB blends filled with N234 CB. Two different trends were highlighted depending on composition. Below 50 wt% of NR in the elastomer phase, the crystallization temperature of PB is higher than that of pure PB indicating that a part of the CB is dispersed in PB. Above 50 wt% of NR, the crystallization temperature of PB is lower than that of pure PB, indicating that the whole CB is in the NR phase and that fractionated crystallization of PB simultaneously occurs. Both phenomena are consistent as the dispersed phase morphology is favored by a large increase of the matrix viscosity by the filler. For both CBs, the results indicate that CB has larger affinity for NR than for PB. This tendency was confirmed by transmission electron microscopy. FIG. 7. TEM micrographs of NR/PB blend containing 70 wt% NR in the elastomer phase and filled with 16.7 wt% of N234: (a) 340 000 and (b) 360 000.

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Fractionated crystallization of dispersed PA6 phase of PP/PP‐g‐MAH/PA6 blends

Cited by 20 publications

References 31 publications

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

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

Effect of a dual compatibilizer on the formation of co-continuous morphology of immiscible po`lymer blends

Quantification of the distribution of carbon black in natural rubber/polybutadiene blends by differential scanning calorimetry

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