Polymer Blend Compatibilization by Gradient Copolymer Addition during Melt Processing:  Stabilization of Dispersed Phase to Static Coarsening

2005 ◽  
Vol 38 (4) ◽  
pp. 1037-1040 ◽  
Author(s):  
Jungki Kim ◽  
Maisha K. Gray ◽  
Hongying Zhou ◽  
SonBinh T. Nguyen ◽  
John M. Torkelson
Keyword(s):  
Polymer Blend ◽  
Melt Processing ◽  
Dispersed Phase ◽  
Gradient Copolymer

PP/EPDM Blends Compatibilized by Organically Modified Clays

2015 ◽  
Vol 820 ◽  
pp. 355-360
Author(s):  
Kaline Rosário Morais Ferreira ◽  
D.L.A.C.S. Andrade ◽  
E.L. Canedo ◽  
C.M.O. Raposo ◽  
Suédina Maria L. Silva
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Polymer Blend ◽  
Dispersed Phase ◽  
X Ray Diffraction ◽  
X Ray ◽  
Polymeric Blends ◽  
Organically Modified ◽  
Internal Mixer ◽  
Scanning Electron

In this study, the influence of type and amount of organoclay in the morphology of the polymer blend PP/EPDM is evaluated. Pure and filled mixtures were prepared by melt intercalation in an internal mixer. The morphology of the hybrids was evaluated by X-ray diffraction and scanning electron microscopy. The results showed that the incorporation of the organophyllic clay to the PP/EPDM blend resulted in new interfacial interactions between components, which contributed to a decrease in the size of the dispersed phase and the compatibility of the blends. Therefore, organoclays may be employed to compatibilize polymeric blends, replacing conventional compatibilizers.

Stabilization of Dispersed Phase to Static Coarsening:  Polymer Blend Compatibilization via Solid-State Shear Pulverization

2002 ◽  
Vol 35 (23) ◽  
pp. 8672-8675 ◽  
Author(s):  
Andrew H. Lebovitz ◽  
Klementina Khait ◽  
John M. Torkelson
Keyword(s):  
Solid State ◽  
Polymer Blend ◽  
Dispersed Phase

scholarly journals Interface Strengthening of PS/aPA Polymer Blend Nanocomposites via In Situ Compatibilization: Enhancement of Electrical and Rheological Properties

Materials ◽  
2021 ◽  
Vol 14 (17) ◽  
pp. 4813
Author(s):  
Lilian Azubuike ◽  
Uttandaraman Sundararaj
Keyword(s):  
Maleic Anhydride ◽  
Rheological Properties ◽  
Polymer Blend ◽  
Network Formation ◽  
Melt Processing ◽  
Constant Composition ◽  
In Situ Compatibilization ◽  
The Matrix ◽  
Blend Nanocomposites

The process of strengthening interfaces in polymer blend nanocomposites (PBNs) has been studied extensively, however a corresponding significant enhancement in the electrical and rheological properties is not always achieved. In this work, we exploit the chemical reaction between polystyrene maleic anhydride and the amine group in nylon (polyamide) to achieve an in-situ compatibilization during melt processing. Herein, nanocomposites were made by systematically adding polystyrene maleic anhydride (PSMA) at different compositions (1–10 vol%) in a two-step mixing sequence to a Polystyrene (PS)/Polyamide (aPA) blend with constant composition ratio of 25:75 (PS + PSMA:aPA) and 1.5 vol% carbon nanotube (CNT) loading. The order of addition of the individual components was varied in two-step mixing procedure to investigate the effect of mixing order on morphology and consequently, on the final properties. The electrical and rheological properties of these multiphase nanocomposite materials were investigated. The optical microscope images show that for PS/aPA systems, CNTs preferred the matrix phase aPA, which is the thermodynamically favorable phase according to the wettability parameter calculated using Young’s equation. However, aPA’s great affinity for CNT adversely influenced the electrical properties of our blend. Adding PSMA to PS/aPA changed the structure of the droplet phase significantly. At 1.5 vol% CNT, a more regular and even distribution of the droplet domains was observed, and this produced a better framework to create more CNT networks in the matrix, resulting in a higher conductivity. For example, with only 1.5 vol% CNT in the PBN, at 3 vol% PSMA, the conductivity was 7.4 × 10−2 S/m, which was three and a half orders of magnitude higher than that seen for non-reactive PS/aPA/CNT PBN. The mechanism for the enhanced conductive network formation is delineated and the improved rheological properties due to the interfacial reaction is presented.

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