Quantitative evaluation of fractionated and homogeneous nucleation of polydisperse distributions of water-dispersed maleic anhydride-grafted-polypropylene micro- and nano-sized droplets

Ibarretxe, Julen; Groeninckx, Gabriël; Bremer, L.G.B.; Mathot, Vincent

doi:10.1016/j.polymer.2009.06.067

Cited by 35 publications

(31 citation statements)

References 26 publications

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“…Dedicated crystallization events of PP in the interesting temperature range between 45 and 80°C were reported by Duran et al [43] and Ibarretxe et al [44]. In both reports, the material was crystallized in confinements and the considered crystallization process was measured in conventional DSC during cooling at 10 and 5 K/min, respectively.…”

Section: Different Nucleation Mechanismsmentioning

confidence: 90%

“…Ibarretxe et al [44] studied the crystallization of water-dispersed maleic anhydride-grafted polypropylene at droplets with a number average of the diameters between 0.06 and 4.5 μm. Especially the samples with a number average diameter of the droplets of around 2 μm show a crystallization event in between 50 and 60°C.…”

Section: Different Nucleation Mechanismsmentioning

confidence: 99%

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A new crystallization process in polypropylene highly filled with calcium carbonate

2015

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Section: Different Nucleation Mechanismsmentioning

confidence: 90%

Section: Different Nucleation Mechanismsmentioning

confidence: 99%

A new crystallization process in polypropylene highly filled with calcium carbonate

2015

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“…In most computer simulations, homogeneous nucleation is assumed to be the starting point of crystallization, while in experiments crystallization originates in most cases from heterogeneous nuclei. Fast scanning calorimetry, on the other hand, is one of the few techniques allowing one fast enough cooling in bulk samples to avoid heterogeneous nucleation on cooling [31] in contrast to the earlier observed homogeneous nucleation in droplets [32][33][34][35]. While in droplets the occurrence of one homogeneously formed nucleus is commonly observed only after complete crystallization of the whole droplet, in bulk samples differential fast scanning calorimetry (DFSC) is able to follow the growth until impingement.…”

Section: Polymer Crystallizationmentioning

confidence: 99%

1. Influence of Thermal Prehistory on Crystal Nucleation and Growth in Polymers

Schick¹,

Zhuravlev²,

Androsch³

et al. 2014

Glass

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Observations regarding the effect of thermal history of crystallizing polymer melts onto the outcome of crystal nucleation and growth processes are investigated experimentally. Some results can be at least on a qualitative basis explained by classical nucleation theory (CNT) while others are not easy to understand in the framework of CNT. The origin of the respective problems and possible extensions of CNT to overcome them are briefly discussed. We chose polymers as model systems because they allow one a separate investigation of nucleation and growth processes in a wide temperature and time range. Furthermore they are well suited to be analyzed experimentally by the recently developed fast scanning calorimetry. In particular, by applying fast scanning calorimetry we are able to investigate processes in bulk samples and do not need to use droplets to study homogeneous nucleation kinetics. Fast scanning calorimetry enables us to observe homogeneous nucleation in materials crystallizing relatively fast like most of the industrial relevant semicrystalline polymers. Quantitative analysis allowed us to judge the nucleation efficiency of additives in the whole range of temperatures, where polymers crystallize. Besides the observed nucleation and growth below the glass transition information about the nucleation activity of small crystals grown at different temperatures relative to the cold-crystallization temperature range were obtained. Finally we show how relaxation of the under-cooled melt (glass) influences homogeneous nucleation. These data may serve as input for a more general description of the interplay of nucleation-growth and relaxation processes within the framework of a structural order-parameter model.

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“…[121]. Moreover, the density of primary crystal nuclei in such heterogeneity-free droplets and bulk, impurities-containing samples when crystallized at high supercooling seemingly is identical [139,[154][155][156][157].…”

Section: Bimodal Temperature Dependence Of the Gross Crystallization mentioning

confidence: 99%

Fast Scanning Calorimetry

Schick¹,

Mathot²

2016

121

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Quantitative evaluation of fractionated and homogeneous nucleation of polydisperse distributions of water-dispersed maleic anhydride-grafted-polypropylene micro- and nano-sized droplets

Cited by 35 publications

References 26 publications

A new crystallization process in polypropylene highly filled with calcium carbonate

A new crystallization process in polypropylene highly filled with calcium carbonate

1. Influence of Thermal Prehistory on Crystal Nucleation and Growth in Polymers

Fast Scanning Calorimetry

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