The effects of SEBS-g-maleic anhydride reaction on the morphology and properties of polypropylene/PA6/SEBS ternary blends

Wilkinson, Andrew; Clemens, M; Harding, V.M.

doi:10.1016/j.polymer.2004.05.033

Cited by 181 publications

(147 citation statements)

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“…With addition of TPEg, the intensity of the shoulder peak gradually becomes weak and seems to disappear in the case of 24 wt % TPEg, whereas the position of high melting peak remains unchanged. Wilkinson et al 28 also found the same phenomenon in the PP/PA6/SEBS-g-MA ternary blends and attributed the shoulder peak to the secondary crystallization of PA6 component. [29][30][31] The extruded PA6 used in the study also exhibits this bimodal melting behavior under the same measurement condition.…”

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confidence: 61%

“…[29][30][31] The extruded PA6 used in the study also exhibits this bimodal melting behavior under the same measurement condition. The conditions that reduce the mobility of chain segments after primary crystallization has occurred, such as rapid cooling 28 and crystallization at high degrees of undercooling, 2,28 can suppress the development of the low temperature shoulder and produce a melting endotherm with a single peak.…”

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confidence: 99%

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Crystallization Behaviors of Polypropylene/Polyamide-6 Blends Modified by a Maleated Thermoplastic Elastomer

Liu

Xie²,

Zhang

et al. 2006

Polym J

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ABSTRACT:In this paper, with the maleated thermoplastic elastomer (TPEg) as a compatibilizer of polypropylene (PP)/polyamide-6 (PA6) blends, the effects of interfacial compatibilization on the crystallization behaviors of the blends were investigated by differential scanning calorimetry (DSC). Compared with the binary blend, the addition of TPEg significantly affected the crystallization behaviors of the individual component in the blends, especially those of PA6. The presence of TPEg weakened the nucleating role of the PA6 on the PP matrix. The increasing concentration of the compatibilizer caused a decrease in crystallization temperature (T c ) and crystallization enthalpy (ÁH c ) associated with PA6. When TPEg amount was added up to 24 wt %, the crystallization of PA6 at its bulk T c was almost completely suppressed and the complete concurrent crystallization of PA6 and PP matrix took place. In the case of PP/PA6/TPEg blend containing 24 wt % TPEg, it was found that the disappearance of bulk PA6 crystallization peak was independent of the cooling rate and annealing time, but can be introduced by self-nucleation experiments. The above fractionated crystallization phenomenon was attributed to the reduction in PA6 particle size due to compatibilization role of added TPEg, which leads to the lack of the active heterogeneities. The crystalline morphologies under isothermal conditions were also observed by polarized optical microscopy (POM). [DOI 10.1295/polymj.38.21] KEY WORDS Polypropylene (PP) / Polyamide-6 / Crystallization / Compatibilization / Morphology / Compatibilization strongly affects the blend phase morphology and as such, it may also influence the crystallization behaviors of the blend. Both morphology and crystallization behaviors are closely related with the final properties of the blend, a profound understanding of the crystallization behavior and the resulting semicrystalline structure in polymer blends is necessary for effective manipulation and control of their properties from both scientific and industrial point of view. However, the general influence of a compatibilizer on the crystallization behavior of an immiscible polymer blend system is still far from being well understood, especially for crystalline polymer/crystalline polymer.

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confidence: 61%

mentioning

confidence: 99%

Crystallization Behaviors of Polypropylene/Polyamide-6 Blends Modified by a Maleated Thermoplastic Elastomer

Liu

Xie²,

Zhang

et al. 2006

Polym J

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“…Suplicz and Kovács [22] developed thermally conductive polymer/LMTM composites which can be processed easily with injection molding. However, the extremely low viscosity and ultrahigh surface tension of liquid metal compared with polymer melt [6,[24][25][26] would lead to serious agglomeration of LMTM. Thus the content and the dispersion of LMTM in polymer matrix would be severely restricted [27].…”

Section: Y C Jia H He * P Yu J Chen X L Laimentioning

confidence: 99%

Synergistically improved thermal conductivity of polyamide-6 with low melting temperature metal and graphite

Jia¹,

He²,

Yu³

et al. 2016

Express Polym. Lett.

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Abstract. Low melting temperature metal (LMTM)-tin (Sn) was introduced into polyamide-6 (PA6) and PA6/graphite composites respectively to improve the thermal conductivity of PA6 by melt processing (extruding and injection molding). After introducing Sn, the thermal conductivity of PA6/Sn was nearly constant because of the serious agglomeration of Sn. However, when 20 wt% (5.4 vol%) of Sn was added into PA6 containing 50 wt% (33.3 vol%) of graphite, the thermal conductivity of the composite was dramatically increased to 5.364 versus 1.852 W·(m·K) -1 for the PA6/graphite composite, which suggests that the incorporation of graphite and Sn have a significant synergistic effect on the thermal conductivity improvement of PA6. What is more, the electrical conductivity of the composite increased nearly 8 orders of magnitudes after introducing both graphite and Sn. Characterization of microstructure and energy dispersive spectrum analysis (EDS) indicates that the dispersion of Sn in PA6/graphite/Sn was much more uniform than that of PA6/Sn composite. According to Differential Scanning Calorimetry measurement and EDS, the uniform dispersion of Sn in PA6/graphite/Sn and the high thermal conductivity of PA6/graphite/Sn are speculated to be related with the electron transfer between graphite and Sn, which makes Sn distribute evenly around the graphite layers.

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“…(3) for unidirectional strain (∆w = 0), and assuming that the polymer is incompressible (the Poisson ratio of pure SEBS materials ≈ 0.49 [37], resulting in a change in volume ∆V ≈ 0), the following geometric property can be derived between ∆l and ∆h:…”

Section: Soft Elastomeric Capacitormentioning

confidence: 99%

Novel nanocomposite technologies for dynamic monitoring of structures: a comparison between cement-based embeddable and soft elastomeric surface sensors

Ubertini

Laflamme

Ceylan

et al. 2014

Smart Mater. Struct.

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The authors have recently developed two novel solutions for strain sensing using nanocomposite materials. While they both aim at providing cost-effective solutions for the monitoring of local information on largescale structures, the technologies are different in their applications and physical principles. One sensor is made of a cementitious material, which could make it suitable for embedding within the core of concrete structures prior to casting, and is a resistor, consisting of a carbon nanotube cement-based transducer. The other sensor can be used to create an external sensing skin and is a capacitor, consisting of a flexible conducting elastomer fabricated from a nanocomposite mix, and deployable in a network setup to cover large structural surfaces. In this paper, we advance the understanding of nanocomposite sensing technologies by investigating the potential of both novel sensors for the dynamic monitoring of civil structures. First, an indepth dynamic characterization of the sensors using a uniaxial test machine is conducted. Second, their performance at dynamic monitoring of a full-scale concrete beam is assessed, and compared against off-theshelf accelerometers. Experimental results show that both novel technologies compare well against mature sensors at vibration-based structural health monitoring, showing the promise of nanocomposite technologies for the monitoring of large-scale structural systems. The authors have recently developed two novel solutions for strain sensing using nanocomposite materials. While they both aim at providing cost-eective solutions at monitoring local information on large-scale structures, both technologies are dierent in their applications and physical principles. One sensor is made of a cementitious material, which could make it suitable for embedding within the core of concrete structures prior to casting, and is a resistor, consisting of a carbon nanotube-cement based transducer. The other sensor can be used to create an external sensing skin and is a capacitor, consisting of a exible conducting elastomer fabricated from a nanocomposite mix, and deployable in a network setup to cover large structural surfaces. In this paper, we advance the understanding of nanocomposite sensing technologies by investigating the potential of both novel sensors at dynamic monitoring of civil structures. First, an in-depth dynamic characterization of the sensors using a uniaxial test machine is conducted. Second, their performance at dynamic monitoring of a full-scale concrete beam is assessed, and compared against othe-shelf accelerometers. Experimental results show that both novel technologies compare well against mature sensors at vibration-based structural health monitoring, showing the promise of nanocomposite technologies at monitoring large-scale structural systems.

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The effects of SEBS-g-maleic anhydride reaction on the morphology and properties of polypropylene/PA6/SEBS ternary blends

Cited by 181 publications

References 40 publications

Crystallization Behaviors of Polypropylene/Polyamide-6 Blends Modified by a Maleated Thermoplastic Elastomer

Crystallization Behaviors of Polypropylene/Polyamide-6 Blends Modified by a Maleated Thermoplastic Elastomer

Synergistically improved thermal conductivity of polyamide-6 with low melting temperature metal and graphite

Novel nanocomposite technologies for dynamic monitoring of structures: a comparison between cement-based embeddable and soft elastomeric surface sensors

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