Nucleating effect of calcium stearate coated CaCO3 nanoparticles on polypropylene

Lin, Yong; Chen, Haibin; Chan, Chi‐Ming; Wu, Jingshen

doi:10.1016/j.jcis.2010.10.069

Cited by 51 publications

(40 citation statements)

References 43 publications

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“…In this work, only the effect of nanoparticles is investigated for the crystallization of PLA composites. PCC nanoparticles were applied as nucleating agents into polypropylene for the formation of phase PP [23,24]. Similar enhanced crystallization behaviour was also found when the HNT nanotubes were added into PP, which is attributed to the unique morphology with multiwalled inorganic tubes and rolled by some aluminosilicate layers [25].…”

Section: Crystallization Behavior Of Pla Compositesmentioning

confidence: 52%

Comparison of Precipitated Calcium Carbonate/Polylactic Acid and Halloysite/Polylactic Acid Nanocomposites

Shi

Zhang

Siligardi

et al. 2015

Journal of Nanomaterials

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PLA nanocomposites with stearate coated precipitated calcium carbonate (PCC) and halloysite natural nanotubes (HNT) were prepared by melt extrusion. The crystallization behavior, mechanical properties, thermal dynamical mechanical analysis (DMTA), and the morphology of the PCC/PLA, HNT/PLA, and HNT/PCC/PLA composites were discussed. Compared to halloysite nanotubes, PCC nanoparticles showed a better nucleating effect, which decreased both the glass transition and cold crystallization temperatures. The tensile performance of PLA composites showed that the addition of inorganic nanofillers increased Young's modulus but decreased tensile strength. More interestingly, PLA composites with PCC particles exhibited an effectively increased elongation at break with respect to pure PLA, while HNT/PLA showed a decreased ultimate deformation of composites. DMTA results indicated that PLA composites had a similar storage modulus at temperatures below the glass transition and the addition of nanofillers into PLA caused to shift to lower temperatures by about 3 ∘ C. The morphological analysis of fractures surface of PLA nanocomposites showed good dispersion of nanofillers, formation of microvoids, and larger plastic deformation of the PLA matrix when the PCC particles were added, while a strong aggregation was noticed in composites with HNT nanofillers, which has been attributed to a nonoptimal surface coating.

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Section: Crystallization Behavior Of Pla Compositesmentioning

confidence: 52%

Comparison of Precipitated Calcium Carbonate/Polylactic Acid and Halloysite/Polylactic Acid Nanocomposites

Shi

Zhang

Siligardi

et al. 2015

Journal of Nanomaterials

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“…When containing 20 wt% CF, PP/CF conductive composites have optimal Tonset (126.25 °C) and Tc (122.28 °C), which are greater than those of pure PP by 10.04 °C and 10.82 °C, respectively. Such results are ascribed to the combination of GNs or CF as the nucleating agent of PP, which makes the nucleation mode heterogeneous instead of homogeneous, significantly decreases the nucleation free energy, and allows the molecular chain to attach to and be arranged orderly on the nucleating agent [22,23]. GNs demonstrate a more significant influence over the Tonset and Tc of PP than CF does.…”

Section: Testsmentioning

confidence: 99%

Polypropylene/Graphene and Polypropylene/Carbon Fiber Conductive Composites: Mechanical, Crystallization and Electromagnetic Properties

et al. 2015

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This study aims to examine the properties of composites that different carbon materials with different measurements can reinforce. Using a melt compounding method, this study combines polypropylene (PP) and graphene nano-sheets (GNs) or carbon fiber (CF) to make PP/GNs and PP/CF conductive composites, respectively. The DSC results and optical microscopic observation show that both GNs and CF enable PP to crystalize at a high temperature. The tensile modulus of PP/GNs and PP/CF conductive composites remarkably increases as a result of the increasing content of conductive fillers. The tensile strength of the PP/GNs conductive composites is inversely proportional to the loading level of GNs. Containing 20 wt% of GNs, the PP/GNs conductive composites have an optimal S/m when composed of no less than 3 wt% of CF, and an optimal EMI SE of 25 dB when composed of 20 wt% of CF.

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“…Thus the structure of surface coating is further investigated, particularly in relation to the phase transitions taking place in the physisorbed calcium alkanoate layers, weakly linked to the incomplete chemisorbed layer, during the drying stage [18]. In fact, those physically adsorbed layers play a critical role in the dispersion of the particles in the polymer during melt blending, and act as an interface or interphase when precipitated calcium carbonate is applied as a filler in particulate-filled polymers [1,19]. Thus a proper control on the structure and composition of these layers is very relevant in order to tailor the final mechanical properties of the composites.…”

Section: Introductionmentioning

confidence: 99%

Structure and surface coverage of water-based stearate coatings on calcium carbonate nanoparticles

Shi

Bertóti

Pukánszky

et al. 2011

Journal of Colloid and Interface Science

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Nucleating effect of calcium stearate coated CaCO3 nanoparticles on polypropylene

Cited by 51 publications

References 43 publications

Comparison of Precipitated Calcium Carbonate/Polylactic Acid and Halloysite/Polylactic Acid Nanocomposites

Comparison of Precipitated Calcium Carbonate/Polylactic Acid and Halloysite/Polylactic Acid Nanocomposites

Polypropylene/Graphene and Polypropylene/Carbon Fiber Conductive Composites: Mechanical, Crystallization and Electromagnetic Properties

Structure and surface coverage of water-based stearate coatings on calcium carbonate nanoparticles

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