Thermodynamics and Morphology and Compatibilization of Polymer Blends

Starý, Zdeněk

doi:10.1002/9783527645602.ch03

Cited by 11 publications

(8 citation statements)

References 153 publications

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“…The dispersed morphology can achieve a spherical shape in order to retain the low surface free energy of the blend system. The polymer blends can also have cylindrical shapes because of mechanical stress during melt processing . As shown in Figures and , the fractured surface of pure PP was clear with no POE domains.…”

Section: Resultsmentioning

confidence: 96%

Effects of compatibility on foaming behavior of polypropylene/polyolefin elastomer blends prepared using a chemical blowing agent

Kim

Lee

et al. 2017

J of Applied Polymer Sci

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Polypropylene (PP) exhibits poor foaming property because of its low melt strength arising from its linear chains and relatively narrow molecular weight distribution. To fabricate a PP foam without crosslinking, PP should be blended with polyolefin elastomers (POEs) using chemical blowing agents. In this study, the effects of POE types and contents in a PP matrix were studied by analyzing the melt flow index, morphology, and thermal and dynamic viscoelastic properties. Furthermore, the POE type/content and foaming conditions (i.e., foaming temperature and oven residence time) were optimized by investigating the volume expansion ratio (VER), cross-sectional morphology, and hardness of the PP/POE foams. We focused on how the foaming behavior and foaming conditions were affected by the compatibility and POE content in the PP/POE blend. The results demonstrated that the optimal VER of 9 was obtained at 30 wt % POE and foaming conditions of 220 8C for 9 min.

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Section: Resultsmentioning

confidence: 96%

Effects of compatibility on foaming behavior of polypropylene/polyolefin elastomer blends prepared using a chemical blowing agent

Kim

Lee

et al. 2017

J of Applied Polymer Sci

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“…The dispersed morphology forms a spherical shape to minimize the free surface energy of the blend system. The morphology exhibits cylindrical shapes because the dispersed particles solidify before regaining an energetically favorable spherical shape [ 47 ]. The cryo-fractured surface shows a continuous morphology for PLM7 and PLMS7.…”

Section: Resultsmentioning

confidence: 99%

Effect of PMMA/Silica Hybrid Particles on Interfacial Adhesion and Crystallization Properties of Poly(lactic acid)/Block Acrylic Elastomer Composites

et al. 2020

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Poly(lactic acid) (PLA) is a relatively brittle polymer, and its low melt strength, ductility, and thermal stability limit its use in various industrial applications. This study aimed to investigate the effect of poly(methyl methacrylate) (PMMA) and PMMA/silica hybrid particles on the mechanical properties, interfacial adhesion, and crystallization behavior of PLA/block acrylic elastomer. PLA/block acrylic elastomer blends exhibit improved flexibility; however, phase separation occurs between PLA and block acrylic elastomer domains. Valid time-temperature superposition (TTS) measurements of viscoelastic behavior were obtained and exhibited interfacial adhesion with the addition of PMMA or PMMA/silica in PLA/block acrylic elastomer blends. In particular, the phase separation temperature was increased by the incorporation of PMMA/silica hybrid particles, which suggests a potential role for these particles in improving the phase stability. In addition, PMMA inhibits crystallization, while PMMA/silica acts as a nucleating agent, thus increasing the crystallization rate and crystallinity degree.

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“…But, an inherent limitation of blending is that the morphology is often dictated by the interplay and delicate balance of multiple kinetic processes. 42 Thus, achieving targeted molecular order for each of the components at multiple length scales is difficult and perhaps impossible. The outcome is typically a compromise that sacrifices performance.…”

Section: Introductionmentioning

confidence: 99%

Polymer Nanoparticle Assemblies: A Versatile Route to Functional Mesostructures

et al. 2015

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Fabricating macromolecular mesoscale assemblies containing disparate components with targeted molecular order for each of the components on the nanoscale and targeted assembly of the components in the mesoscale is a challenge. In this Perspective, we explore the self-assembly of polymer nanoparticles as a viable route to obtain tunable mesostructured materials. We describe the state-of-the-art methods available for and the challenges to obtain spherical and nonspherical polymer nanoparticles. We discuss the predicted ordered assemblies and disordered assemblies of nanoparticles and the challenges to obtain these assemblies in polymer nanoparticles. We also comment on the rich and future opportunities in the burgeoning field of polymer nanoparticle assemblies.

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Thermodynamics and Morphology and Compatibilization of Polymer Blends

Cited by 11 publications

References 153 publications

Effects of compatibility on foaming behavior of polypropylene/polyolefin elastomer blends prepared using a chemical blowing agent

Effects of compatibility on foaming behavior of polypropylene/polyolefin elastomer blends prepared using a chemical blowing agent

Effect of PMMA/Silica Hybrid Particles on Interfacial Adhesion and Crystallization Properties of Poly(lactic acid)/Block Acrylic Elastomer Composites

Polymer Nanoparticle Assemblies: A Versatile Route to Functional Mesostructures

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