Thermal behavior and morphology of polyamide 6 based multicomponent blends

Jafari, Seyed Hassan; Pötschke, Petra; Stephan, M.; Pompe, G.; Warth, Holger; Alberts, H.

doi:10.1002/app.10570

Cited by 33 publications

(40 citation statements)

References 23 publications

(11 reference statements)

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“…The blend components covered various polymers, among which styrenic copolymers, such as acrylonitrile-butadiene-styrene (ABS), acrylonitrilestyrene (SAN) and hydrogenated styrene-butadiene-styrene (SEBS) have been widely investigated. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18] However, due to thermodynamical immiscibility, polyamide-containing blends usually exhibit poor phase dispersion and interfacial adhesion, which in turn result in unsatisfactory mechanical properties. Therefore, there is extensive interest in improving their compatibility by the use of a reactive compatibilizer, to enhance the interfacial adhesion and control the morphology of the polymer blends during melt blending.…”

Section: Introductionmentioning

confidence: 99%

Morphology and Thermal Properties of MCPA6/ABS by in situ Polymerization of ε‐Caprolactam

Hou

Yang

2005

Macro Chemistry & Physics

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Summary: In this work, blends of monomer casting polyamide 6 (MCPA6) and acrylonitrile‐butadiene‐styrene (ABS) were successfully prepared by in situ polymerization via the application of ε‐caprolactam as a reactive solvent. The morphology and thermal properties of MCPA6/ABS were investigated by means of wide angle X‐ray diffraction (WAXD), differential scanning calorimetry (DSC) and scanning electron microscopy (SEM), respectively. The domain sizes of the ABS phase in MCPA6/ABS blends were much finer than those in corresponding polyamide 6 (PA6)/ABS blends prepared by simple melt blending. With an increased amount of ABS in MCPA6, the melt enthalpy (ΔHf), the rate of crystallization (Tc) and the degree of crystallinity (Xc(DSC)) of MCPA6 in MCPA6/ABS blends were all decreased. The degree of supercooling (ΔTd) showed a contrary trend. However, the melting temperatures of these blends were almost unchanged. All the results could be attributed to in situ polymerization and the hydrolysis reaction of ABS that occurred during the polymerization process. Furthermore, WAXD results showed that only α‐form crystals existed in the MCPA6/ABS blends, despite the ABS content and heat treatment.

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Section: Introductionmentioning

confidence: 99%

Morphology and Thermal Properties of MCPA6/ABS by in situ Polymerization of ε‐Caprolactam

Hou

Yang

2005

Macro Chemistry & Physics

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“…In the earlier works, the thermal and morphological properties of blends of (PA 6) with styrenic polymers were discussed by Jafari et al 7,8 These studies revealed that the concentration of compatibilizer strongly affects the microstructure (disperse or cocontinuous morphology) and in addition the crystallization rate of the blend. Lee et al 9 investigated the morphology of compatibilized PA 6/ABS blends as a function of composition, compatibilizer concentration, and feed rate during extrusion.…”

Section: Introductionmentioning

confidence: 98%

Micromechanical processes and failure phenomena in reactively compatibilized blends of polyamide 6 and styrenic polymers. II. Polyamide 6/styrene‐acrylonitrile copolymer blends

Handge

Sailer

Steininger

et al. 2009

J of Applied Polymer Sci

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This work reports on morphological, mechanical, and micromechanical properties of polyamide 6 (PA 6), a styrene-acrylonitrile copolymer (SAN), and their blends, which were reactively compatibilized using a styrene-acrylonitrile maleic anhydride (SANMA) terpolymer. Transmission electron microscopy (TEM) investigations revealed the phase morphology of the blends, which is characterized by inclusions of the minor component in the matrix of the major phase. The blend with 50% PA 6 and 50% SAN depicted a cocontinuous morphology. Using a microtensile device for TEM, the samples were deformed under uniaxial loading in the ''dry'' state (characterized by a zero water content in the PA 6 phase) and in a ''wet'' state (with water in the PA 6 phase). Whereas the dry blends behaved brittle, the wet blends showed a larger ductility with the formation of deformation bands in the matrix (PA 6 or SAN), which were initiated by stress concentration at the SAN and PA 6 particles, respectively. In the interface of blends with a PA 6 matrix and SAN inclusions, two phenomena were observed: partial cavitation and debonding on the one hand and partial fibrillation on the other hand.

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“…[8][9][10][11][12][13] Jafari et al 9 studied the thermal behavior and morphology of PA6 blends with styrenic polymers. Their study revealed that compatibilized blends had a lower nucleation rate in the PA6 phase than uncompatibilized ones.…”

Section: Introductionmentioning

confidence: 99%

Micromechanical processes and failure phenomena in reactively compatibilized blends of polyamide 6 and styrenic polymers. I. Polyamide 6/acrylonitrile– butadiene–styrene copolymer blends

Handge

Sailer

Steininger

et al. 2009

J of Applied Polymer Sci

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In this work, in situ investigations of the micromechanical properties of reactively compatibilized blends of polyamide 6 (PA6) and an acrylonitrile-butadiene-styrene copolymer (ABS) were performed with transmission electron microscopy. Three PA6/ABS blends were prepared with a disperse morphology (inclusions of PA6 or ABS) and with a cocontinuous structure. The objective of this work was to study the deformation of the inclusions and the interface between the PA6 phase and the ABS phase. Our transmission electron microscopy investigations revealed that the morphology of the blends was strongly influenced by the asymmetric nature of the interface between PA6 and ABS. In the blends with a PA6 matrix, the interface between PA6 and the ABS inclusions was deformed in tensile deformation under uniaxial loading. A strong influence of the PA6 water content on the (micro)mechanical behavior was observed. Although the ''dry'' blends behaved in a brittle fashion, the ''wet'' blends behaved in a ductile fashion with the formation of deformation bands in the matrix (PA6 or ABS), which were initiated by stress concentration at the particles (ABS or PA6, respectively).

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Thermal behavior and morphology of polyamide 6 based multicomponent blends

Cited by 33 publications

References 23 publications

Morphology and Thermal Properties of MCPA6/ABS by in situ Polymerization of ε‐Caprolactam

Morphology and Thermal Properties of MCPA6/ABS by in situ Polymerization of ε‐Caprolactam

Micromechanical processes and failure phenomena in reactively compatibilized blends of polyamide 6 and styrenic polymers. II. Polyamide 6/styrene‐acrylonitrile copolymer blends

Micromechanical processes and failure phenomena in reactively compatibilized blends of polyamide 6 and styrenic polymers. I. Polyamide 6/acrylonitrile– butadiene–styrene copolymer blends

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