Blends of i‐PP and SBS. II. Influence of <i>in situ</i> compatibilization on the mechanical properties

Wilhelm, Helena Maria; Felisberti, Maria I.

doi:10.1002/app.11447

Cited by 17 publications

(10 citation statements)

References 32 publications

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“…[23,20,24,25] The resulting grafted chlorobenzylic moieties were then converted into anion exchange sites by quaternization with aliphatic diamines such as the 1,4-diazabicyclo[2.2.2]octane (Dabco) [26,27,6,28] thus providing an anion exchange crosslinked membrane in the form of a thin sheet (50-100 mm). Bifunctional Dabco likely produces crosslinked structure (structure d in scheme 2) during the quaternization reaction (all SBS-based membranes were not soluble in solvents any more), thus preventing interconversion between conformers and limiting Hofmann degradation.…”

Section: Introductionmentioning

confidence: 99%

Modulation of the electrochemical properties of SBS-based anionic membranes by the amine molecular structure

Filpi¹,

Boccia²,

Pucci³

et al. 2013

E-Polymers

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In this work, different amines (bifunctional, as diazabicyclo[2.2.2]octane (Dabco) and monofunctional, as N-methylimidazole or trimethylamine) were utilized for the amination of benzyl chloride-grafted polystyrene-b- poly(butadiene)-b-polystyrene triblock copolymers (SBS-g- VBC). The use of Dabco solutions in mixture with variable amounts of monoamine or at different concentration allowed to modulate the degree of crosslinking of the SBS-based membranes and their electrochemical parameters. More specifically, tuning Dabco concentration permitted the reduction of water uptake without significantly affecting ionic conductivit

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Section: Introductionmentioning

confidence: 99%

Modulation of the electrochemical properties of SBS-based anionic membranes by the amine molecular structure

Filpi¹,

Boccia²,

Pucci³

et al. 2013

E-Polymers

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“…Different elastomers, such as ethylene–propylene–diene monomer (EPDM), ethylene‐propylene rubber (EPR), styrene‐butadiene‐styrene (SBS), styrene–ethylene–butadiene–styrene (SEBS), polyolefin elastomer (POE), Noryl, and polyurethane, have been incorporated in polypropylene (PP) to enhance the toughening characteristics of blends. Rubber toughening is a function of the interparticle distance of the rubber phase (dispersed phase), attributed to the mixing process and the viscosity ratio of constituent polymers, strain rate of the test, temperature of the experiment, and interfacial adhesion between elastomer and matrix .…”

Section: Introductionmentioning

confidence: 99%

Influence of thermal and morphological characteristics on mechanical responses of polypropylene/γ‐irradiated elastomer blends

Dutta

Ghosh

2018

J of Applied Polymer Sci

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The approach of this paper is to examine the mechanical responses of polypropylene (PP)/γ‐irradiated ethylene acrylic elastomer blends and subsequently compare them with the PP/unirradiated ethylene acrylic elastomer blends. Thorough correlations were drawn between the mechanical characteristics of blends and their morphological, thermal, thermomechanical, and fractured surface morphological aspects. The idea of carrying out γ‐irradiation was to introduce crosslinking points in the elastomer phase. For better understanding, correlations between the impact test results and the fractured surface morphologies were analyzed. The limited tensile properties of PP/γ‐irradiated elastomer blends were attributed not only to the poor interfacial adhesion, obtained by fitting with several theoretical mechanical models, but also to the substantially higher elastomer particle size in the blends than in the PP/unirradiated elastomer blends. The higher loss modulus and tan δ values for PP/unirradiated elastomer blends along with the attainment of much smaller particles of elastomers were responsible for the phenomenal increase in impact properties, which was actually attributed to the formation of crazes inside the dispersed phase during applied impact stress. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46597.

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“…The superior mechanical properties of CNT are fascinating, if they can be incorporated compatibly into a polymer matrix. The polymer/CNT composites can be utilized as advanced structural materials that potentially replace low‐strength metals such as aluminum 15–21. However, the hurdles of current progress in the development of polymer/CNTs include the high cost of CNTs and difficulty in realization of their theoretical potential of mechanical reinforcement 22.…”

Section: Introductionmentioning

confidence: 99%

Crystallization and melting behavior of multi‐walled carbon nanotube‐reinforced nylon‐6 composites

Phang

Ma²,

Shen

et al. 2005

Polymer International

129

104

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The crystallization and melting behavior of neat nylon-6 (PA6) and multi-walled carbon nanotubes (MWNTs)/PA6 composites prepared by simple melt-compounding was comparatively studied. Differential scanning calorimetry (DSC) results show two crystallization exotherms (T CC,1 and T CC,2 ) for PA6/MWNTs composites instead of a single exotherm (T CC,1 ) for the neat matrix. The formation of the higher-temperature exotherm T CC,2 is closely related to the addition of MWNTs. X-ray diffraction (XRD) results indicate that only the α-phase crystalline structure is formed upon incorporating MWNTs into PA6 matrix, independently of the cooling rate and annealing conditions. These observations are significantly different from those for PA6 matrix, where the increase in cooling rate or decrease in annealing temperature results in the crystal transformation from α-phase to γ -phase. The crystallization behavior of PA6/MWNTs composites is also significantly different from those reported in PA6/nanoclay systems, probably due to the difference in nanofiller geometry between one-dimensional MWNTs and twodimensional nanoclay platelets. The nucleation sites provided by carbon nanotubes seem to be favorable to the formation of thermodynamically stable α-phase crystals of PA6. The dominant α-phase crystals in PA6/MWNTs composites may play an important role in the remarkable enhancement of mechanical properties.

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Blends of i‐PP and SBS. II. Influence of in situ compatibilization on the mechanical properties

Cited by 17 publications

References 32 publications

Modulation of the electrochemical properties of SBS-based anionic membranes by the amine molecular structure

Modulation of the electrochemical properties of SBS-based anionic membranes by the amine molecular structure

Influence of thermal and morphological characteristics on mechanical responses of polypropylene/γ‐irradiated elastomer blends

Crystallization and melting behavior of multi‐walled carbon nanotube‐reinforced nylon‐6 composites

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