Influence of Reactive Compatibilization on the Melt Flow Properties and Morphology of Polyamide 6/Styrene‐Acrylonitrile Blends

Phase morphology and rheological behavior of polyamide 6 (PA6)/acrylonitrile butadiene styrene (ABS) polymers blends was studied using scanning electron microscopy and rheometry. The results showed that the phase morphology and rheological properties depends on blend composition. We evaluated the effect of addition of ABS as dispersed phase and EnBACO-MAH (ethylene n-butyl acrylate carbon monoxide maleic anhydride) as a compatibilizer on the morphological and rheological behaviors of PA6/ ABS blends. It was concluded that there is a good agreement between the results obtained from rheological and morphological studies. As a consequence, addition of the ABS and compatibilizer weight percent led to a significant change in morphological structure and a great mounting in the viscosity as well as the elasticity. The rheological properties results demonstrate that adding compatibilizer to polymer blends led to increasing the crossover point, which shows a transition from a high viscous to a considerably more elastic behavior. Also, the slow transition of relaxation time peak from the peak of the PA6 to the peak of the ABS implies increasing the miscibility of the PA6/ABS blend components by increasing compatibilizer content. In addition, the Carreau-Yasuda model was used to extract information on rheological properties (zero shear viscosity and relaxation time) for PA6/ABS/EnBACO-MAH blends by fitting the experimental data with this model.

Section: Resultsmentioning

confidence: 99%

Investigation on the correlation between rheology and morphology of PA6/ABS blends using ethylene acrylate terpolymer as compatibilizer

Mojarrad

Jahani

Barikani

2010

“…Finally, several investigations based upon rotational and extensional rheometry, demonstrated the impact of reactive compatibilization on rheological properties of PA 6/SAN blends with different types of morphology and varying concentration of compatibilizer. [18][19][20][21] In summary, various methods to compatibilize blends of PA 6 and styrenic polymers were investigated and their influence on the macroscopic properties was discussed.…”

Section: Introductionmentioning

confidence: 99%

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

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.

“…It is an effective method to improve the compatibility of immiscible polymer blends and thus to control the properties and the morphology. Reactive compatibilization can be carried out through three methods: (1) The components of the blends with functional groups can react with each other and form a graft copolymer or block copolymer in situ at the interphase in the melt processing; (2) adding a certain kind of polymer which can form covalent or ionic bonds with the component of the blends to improve the miscibility; (3) adding catalysts to promote reactions between the components to generate copolymers with crosslinking structure in situ during the melt processing, such as ester‐ester and ester‐amide exchange reactions …”

Section: Introductionmentioning

confidence: 99%

Effects of blending time and catalyst on the properties of nylon 1010/acrylate rubber blends

Zhang

2013

Nylon 1010 and acrylate rubber (ACM) were prepared by melt blending. The effects of blending time and catalyst on the properties of the blends were studied. It was found that ester-amide exchange reactions between the Nylon 1010 and ACM occurred during melt processing. Long blending time and Tetrabutyl titanate (Ti(OBu) 4 ) as a catalyst could promote the reactions, and grafted copolymer Nylon-g-ACM was in situ generated as a compatibilizer during processing procedure. The tensile strength of the blends increased from about 12.0-15.0 MPa when the blending time increased from 10 to 30 min. The presence of Ti(OBu) 4 led to the decrease in melt flow index (MFI), independent of the blending time (30 or 60 min). Glass transition temperature and heat of fusion of the blends increased after addition of the catalyst. Rheological behavior analysis provided evidence of formation of Nylon-g-ACM graft copolymer. Scanning electron microscopy (SEM) showed that the compatibility of the blends was improved by longer blending time and the addition of catalyst.