Nucleation activity of glass fibers towards iPP evaluated by DSC and polarizing light microscopy

Bogoeva‐Gaceva, Gordana; Janevski, Aco; Mäder, E.

doi:10.1016/s0032-3861(00)00659-5

Cited by 52 publications

(50 citation statements)

References 26 publications

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“…The presence of the carbonyl groups of MAH in PP is believed to promote heterogeneous nucleation, and correspondingly, the shorter t i for the studied modified PPs is observed (Fig. 4) [47].…”

Section: Nucleation and Its Experimental Evaluationmentioning

confidence: 84%

“…The morphology of iPP crystallized from the melt has been studied extensively over the past few decades using PLM [45][46][47], transmission electron microscopy (TEM), scanning electron microscopy (SEM) and atomic force microscopy (AFM) [48]. From investigation carried out by polarizing microscopy, dynamically and isothermally, on the analysis of nucleation morphology of iPP, a lot of information concerning the induction period, nucleation density, growth-rate of the spherulites, and distribution of the dimension of the spherulites can be obtained (Fig.…”

Section: Morphological Scales In Ippmentioning

confidence: 99%

“…3) [49]. Results showed that iPP could crystallize in a wide range of spherulite dimensions (from 10-50 μm to 280-370 μm) depending on the temperature of crystallization and crystallization conditions as well as the presence of nucleating agents [45][46][47][50][51][52]. The presence of maleic grafted PP (PP-g-MA) used as a modifier for PP split films leads to alteration of the crystallization kinetics, although a spherulitic morphology similar to neat PP was developed [45].…”

Section: Morphological Scales In Ippmentioning

confidence: 99%

See 2 more Smart Citations

Crystallization of Polypropylene: Application of Differential Scanning Calorimetry Part Ii. Crystal Forms and Nucleation

Raka¹,

Bogoeva‐Gaceva²

2017

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Section: Nucleation and Its Experimental Evaluationmentioning

confidence: 84%

Section: Morphological Scales In Ippmentioning

confidence: 99%

Section: Morphological Scales In Ippmentioning

confidence: 99%

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Crystallization of Polypropylene: Application of Differential Scanning Calorimetry Part Ii. Crystal Forms and Nucleation

Raka¹,

Bogoeva‐Gaceva²

2017

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“…In general, the results obtained by DSC analysis, applying the known theoretical approaches of polymer crystallization, demonstrate nucleation ability of nanofillers resulting in a change of polymer morphology, similarly to the action of glass and carbon fibers (see Figure 3) [56][57][58][59][60]. (polarizing optical micrograph of a single glass fiber after partial melting of the matrix) [59] Biopolypropylene and "programmed degradable" PP Polypropylene belongs to nonbiodegradable thermoplastics. In fact, most of the synthetic polymers produced from petrochemicals are inherently nonbiodegradable, and through processing and fabrication they are turned into plastics that are environmental nonbiodegradable.…”

Section: Synthesismentioning

confidence: 87%

Advances in Polypropylene Based Materials

Bogoeva‐Gaceva

2017

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Polypropylene is an extremely versatile thermoplastic polymer known for its good performance/price ratio, excellent heat, moisture and chemical resistance, favorable processing characteristics and recyclability. Due to its universal properties, polypropylene is applied in numerous industrial fields such as electronic and electrical, automobile, textile, pipeline, etc. Furthermore, the progress in its synthesis and property modification in the last decade has contributed to the development of new polypropylene based materials with advanced performance. This review aims at reporting on some recent developments in polypropylene based materials, such as nanofibers, natural fiber reinforced composites, self-reinforced polypropylene and polypropylene/clay hybrids, that have replaced many types of engineering thermoplastics in high-performance applications.

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“…Furthermore, although there are many studies related to the effects of silane coupling agents on the mechanical properties of polymer composites [1][2][3][4][5][6][7][8], the number of studies related to the effects of filler modification on the thermal properties of the composites is limited [9][10][11].…”

mentioning

confidence: 99%

The effects of natural zeolite and silane coupling agents on melting and crystallization behaviour of polypropylene

Başalp

Tıhmınlıoğlu

2008

J Therm Anal Calorim

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Polypropylene (PP) is one of the most important commercial polymers due to its superior properties such as high chemical resistance and low density. Fillers (CaCO 3 , Mg(OH) 2 , talc, mica, etc.) or reinforcing agents (glass fibre) are used in many applications of PP such as in household, automotive and packaging industry to enhance the properties of PP (stiffness, gas permeability, heat resistance, flame retardance, etc.), and to reduce the cost. In spite of the advantages of the fillers, the incorporation of the hydrophilic fillers into PP leads to the loss in the mechanical properties and also the changes in the thermal properties of PP. However, the mechanical properties of polymer composites can be improved by using silane coupling agents as those reported in the literature [1][2][3][4][5][6][7].Also, the previous study done by our group on the effects of interfacial interactions on the mechanical properties of PP-natural zeolite composites has indicated that silane coupling agents provide significant improvement in the mechanical properties of the composites [8]. Furthermore, although there are many studies related to the effects of silane coupling agents on the mechanical properties of polymer composites [1][2][3][4][5][6][7][8], the number of studies related to the effects of filler modification on the thermal properties of the composites is limited [9][10][11].Thermal behaviour of polymer composites is important in the determination of end use applications and processing methods of polymer articles. Generally, thermal degradation and crystalline properties of polymer composites can be analyzed by thermogravimetric analysis (TG) and differential scanning calorimetry (DSC) [12][13][14]. In this study, it was aimed to investigate the effect of silane coupling agents and natural zeolite on the thermal properties of PP using DSC and TG. Particularly, non-isothermal crystallization kinetics of the natural zeolite filled PP composites was investigated to determine the effect of cooling conditions on crystallization properties. The crystallization properties affect mechanical and transport properties of polymer composites [15][16][17]. Because of the importance of crystallization process, non-isothermal crystallization kinetics also was investigated using Avrami and Kissinger models for the determination of spherulite growth rate and crystallization activation energy, respectively. Theory Characterization of polymer composites by TGTG is based on the mass loss of a sample due to the formation of volatile products as a function of temperature. TG is used to characterize the decomposi- Analysis and Calorimetry, Vol. 94 (2008) 3, 757-765 The thermal characterization of polypropylene (PP) composites containing untreated and treated zeolite with different silane coupling agents was carried out using thermogravimetric analysis (TG) and differential scanning calorimetry (DSC) to investigate the effects of natural zeolite and surface modifiers on melting, crystallization and degradation behaviour of PP. 3-aminopro...

show abstract

Nucleation activity of glass fibers towards iPP evaluated by DSC and polarizing light microscopy

Cited by 52 publications

References 26 publications

Crystallization of Polypropylene: Application of Differential Scanning Calorimetry Part Ii. Crystal Forms and Nucleation

Crystallization of Polypropylene: Application of Differential Scanning Calorimetry Part Ii. Crystal Forms and Nucleation

Advances in Polypropylene Based Materials

The effects of natural zeolite and silane coupling agents on melting and crystallization behaviour of polypropylene

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