Effects of compatibilizers on the properties of polyamide/polypropylene blends

Holsti-Miettinen, R.; Seppälä, Jukka; Ikkala, Olli

doi:10.1002/pen.760321306

Cited by 156 publications

(76 citation statements)

References 22 publications

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“…However, the general influence of a compatibilizer on the crystallization behavior of an immiscible polymer blend system is still far from being well understood, especially for crystalline polymer/crystalline polymer. 1 In a given crystalline/crystalline blends containing the compatibilizer, the crystallization behaviors of the two blends components are generally affected by the following factors: the size of dispersion, 2-5 the type of compatibilizer 2,3,[6][7][8] and its degree of miscibility with and one or both of the blend components, the amount of compatibilizer added, 9,10 the amount of interface created, 10 and other effects (e.g. the mixing ratio of both crystalline components 2,6 and mixing procedure 11 ).…”

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confidence: 99%

Crystallization Behaviors of Polypropylene/Polyamide-6 Blends Modified by a Maleated Thermoplastic Elastomer

Liu

Xie²,

Zhang

et al. 2006

Polym J

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ABSTRACT:In this paper, with the maleated thermoplastic elastomer (TPEg) as a compatibilizer of polypropylene (PP)/polyamide-6 (PA6) blends, the effects of interfacial compatibilization on the crystallization behaviors of the blends were investigated by differential scanning calorimetry (DSC). Compared with the binary blend, the addition of TPEg significantly affected the crystallization behaviors of the individual component in the blends, especially those of PA6. The presence of TPEg weakened the nucleating role of the PA6 on the PP matrix. The increasing concentration of the compatibilizer caused a decrease in crystallization temperature (T c ) and crystallization enthalpy (ÁH c ) associated with PA6. When TPEg amount was added up to 24 wt %, the crystallization of PA6 at its bulk T c was almost completely suppressed and the complete concurrent crystallization of PA6 and PP matrix took place. In the case of PP/PA6/TPEg blend containing 24 wt % TPEg, it was found that the disappearance of bulk PA6 crystallization peak was independent of the cooling rate and annealing time, but can be introduced by self-nucleation experiments. The above fractionated crystallization phenomenon was attributed to the reduction in PA6 particle size due to compatibilization role of added TPEg, which leads to the lack of the active heterogeneities. The crystalline morphologies under isothermal conditions were also observed by polarized optical microscopy (POM). [DOI 10.1295/polymj.38.21] KEY WORDS Polypropylene (PP) / Polyamide-6 / Crystallization / Compatibilization / Morphology / Compatibilization strongly affects the blend phase morphology and as such, it may also influence the crystallization behaviors of the blend. Both morphology and crystallization behaviors are closely related with the final properties of the blend, a profound understanding of the crystallization behavior and the resulting semicrystalline structure in polymer blends is necessary for effective manipulation and control of their properties from both scientific and industrial point of view. However, the general influence of a compatibilizer on the crystallization behavior of an immiscible polymer blend system is still far from being well understood, especially for crystalline polymer/crystalline polymer.

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confidence: 99%

Crystallization Behaviors of Polypropylene/Polyamide-6 Blends Modified by a Maleated Thermoplastic Elastomer

Liu

Xie²,

Zhang

et al. 2006

Polym J

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“…Isotactic homopolypropylene (PP) is a crystalline polymer whose properties are dependent on the degree of crystallinity and it exhibits three crystalline forms: the monoclinic α-phase, the hexagonal β-phase, and the orthorhombic γ-phase [6][7][8][9][10]. When PP is formed, its crystal formation changes according to the heat treatment temperature and the conditions of cooling process.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Cooling Rate during Crystallization on the Melting Behavior of Polypropylenes of Different Chemical Structure

Lukanina¹,

Хватов²,

Kolesnikova³

et al. 2016

ChChT

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Abstract. The melting behavior of polypropylenes of different chemical structure (isotactic homopolypropylene, propylene-based block and random copolymers and maleic anhydride grafted polypropylene) was studied by differential scanning calorimeter (DSC) and optical microscopy. Melting behavior and the crystal structure of polypropylene and its copolymers were observed depending on the crystallization rate, chemical nature of co-monomer unites and regularity of co-monomer units arrangement in the polypropylene main chain.

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“…SEBS, ungrafted or grafted, has also been found to be an effective impact modifier in these blends. [3][4][5] Compatibilization of binary blends by reactive extrusion has been studied by several research groups. 6,7 The most frequently used functional monomers in free radical grafting are maleic anhydride and glycidyl methacrylate.…”

Section: Introductionmentioning

confidence: 99%

Use of oxazoline functionalized polyolefins and elastomers as compatibilizers for thermoplastic blends

Vocke¹,

Anttila²,

Heino³

et al. 1998

J. Appl. Polym. Sci.

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Oxazoline functionalized polypropylene, polyethylene, ethylene propylene copolymer (E/P), and styrene ethylene/butylene styrene copolymer (SEBS) were studied as compatibilizers in blends of polyolefins with polyesters and polyamides. The blends investigated were polypropylene/polyamide 6, polypropylene/polybutylene terephtalate, and polyethylene/polyamide 6, with engineering thermoplastic contents of 30 wt %. The blends were prepared in a twin-screw midiextruder, and injection molded with a mini-injection molding machine. The effect of compatibilizing on the morphology and mechanical properties of the blends was of interest. Compatibilization substantially improved the toughness of all tested blends. Their strength and stiffness remained at the level of the binary blends when polypropylene or polyethylene based compatibilizers were used, but slightly decreased with other compatibilizers. Morphological studies showed that the particle size was reduced, and the adhesion of the dispersed phase to the matrix improved by compatibilization. The effect of unfunctionalized polyethylene, polypropylene, E/P, and SEBS was also studied to compare the compatibilizers with them.

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Effects of compatibilizers on the properties of polyamide/polypropylene blends

Cited by 156 publications

References 22 publications

Crystallization Behaviors of Polypropylene/Polyamide-6 Blends Modified by a Maleated Thermoplastic Elastomer

Crystallization Behaviors of Polypropylene/Polyamide-6 Blends Modified by a Maleated Thermoplastic Elastomer

The Effect of Cooling Rate during Crystallization on the Melting Behavior of Polypropylenes of Different Chemical Structure

Use of oxazoline functionalized polyolefins and elastomers as compatibilizers for thermoplastic blends

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