Effect of organoclay as a compatibilizer in poly(lactic acid) and natural rubber blends

Ock, Hyun Geun; Kim, Doo Hyun; Ahn, Kyung Hyun; Lee, Seung Jong; Maia, João M.

doi:10.1016/j.eurpolymj.2016.01.042

Cited by 48 publications

(16 citation statements)

References 42 publications

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“…It has been claimed that a finer morphology can be achieved by localization of nanoparticles at the interface or the matrix, due to their effect on the reduction of droplet coalescence, the compatibilizing effect as well as increasing the matrix viscosity . On the other hand, the placement of nanoparticles in the droplets increases the size of the droplets.…”

Section: Resultsmentioning

confidence: 99%

Effect of nanoparticle localization on the rheology, morphology and toughness of nanocomposites based on poly(lactic acid)/natural rubber/nanosilica

Nematollahi

Jalali‐Arani

Modarress

2019

Polymer International

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In this study, poly(lactic acid)/natural rubber blends and their nanocomposites with silica nanoparticles were prepared via the melt mixing process. The rheology, morphology and impact resistance of the prepared samples were examined depending on the silica content (0–7 phr) and its localization. The results obtained showed that the incorporation of silica below its percolation threshold led to its selective localization in the matrix and mostly near the interface. This was in agreement with the results obtained by calculation of the wetting parameter. At a high content of silica, the silica nanoparticles could also be located in the dispersed phase. Energy dispersive spectroscopy and compositional mapping of oxygen and silicon atoms proved the presence of nanoparticles at the interface. The formation of a silica nanolayer with a thickness of 55–70 nm at the interface was shown by AFM. An optimum amount of nanosilica in the blend, through its interfacial localization and reduction of the natural rubber droplet size (confirmed by SEM test), caused a significant improvement in the impact strength, which was nearly 26 times that of neat poly(lactic acid). © 2019 Society of Chemical Industry

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Section: Resultsmentioning

confidence: 99%

Effect of nanoparticle localization on the rheology, morphology and toughness of nanocomposites based on poly(lactic acid)/natural rubber/nanosilica

Nematollahi

Jalali‐Arani

Modarress

2019

Polymer International

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“…Polylactide (PLA) has drawn much attention from both scientific groups and industries, due to favorable properties, such as high gloss, clarity, strength, stiffness (at room temperature), and excellent processability . Moreover, from an environmental point of view, PLA as a bio based and compostable polymer is an appropriate alternative to the petroleum based commodity plastics, which can reduce the carbon footprint and waste disposal threats to the environment .…”

Section: Introductionmentioning

confidence: 99%

Polylactide/organoclay nanocomposites: The effect of organoclay types on the structure development and the kinetic of cold crystallization

Abdolrsaouli

Babaei

Kaschta³

et al. 2018

Vinyl Additive Technology

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Polylactide (PLA)/organoclay composites were prepared by melt compounding with 4 phr of two different types of organoclays (cloisite 20A and cloisite 30B). Structure development and nonisothermal kinetic of cold crystallization of PLA/organoclay nanocomposites were examined by using of X‐ray diffraction technique, transmission electron microscopy, melt viscoelastic measurements, and differential scanning calorimetry. XRD results demonstrated that the melt intercalation of PLA chains into the cloisite 30B and cloisite 20A galleries was achieved to the same extent. However, it was shown that, PLA/cloisite 20A sample exhibited a significant viscosity upturn and a pronounced nonterminal low frequency storage modulus whose values were greater than those of PLA/cloisite 30B nanocomposite. A detailed analysis of the linear melt viscoelastic properties for the filled and unfilled samples at low frequencies was conducted by fitting the complex viscosity and storage modulus data with Carreau–Yasuda and Fractional Zener models, respectively. The glass transition, cold crystallization, melting temperature, and degree of crystallinity of virgin PLA and PLA/organoclay nanocomposites were inspected. Subsequently, the cold crystallization kinetics was analyzed by Avrami, Jezioney, and Lauritzen–Hoffman kinetic models. It was shown that, the crystallization rate followed Avrami equation with the exponent n around 2.4. From Lauritzen–Hoffman equation and Kissinger model, the nucleation parameter Kg and activation energy were estimated, respectively. J. VINYL ADDIT. TECHNOL., 25:48–58, 2019. © 2018 Society of Plastics Engineers

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“…[14,15]. It is often observed that these nanoparticles can concentrate at the interface between the two polymers, lowering the effective surface tension and thus enhancing the interaction between the two polymer phases [16][17][18][19]. Blends of PLLA with other bio-degradable polymers have been widely studied.…”

Section: Introductionmentioning

confidence: 99%

Correlating the morphology of poly(L-lactide)/poly(butylene succinate)/graphene oxide blends nanocomposites with their crystallization behavior

Fenni¹,

Monticelli²,

Conzatti³

et al. 2018

Express Polym. Lett.

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Abstract. Bio-based blend nanocomposites of poly(L-lactic acid) (PLLA) and poly(butylene succinate) (PBS), with different concentrations (from 0.1 to 0.5 wt%) of graphene oxide (GO), are prepared via solution dispersion of PBS/GO followed by melt blending with PLLA in a 70/30 PLLA/PBS weight ratio. Scanning and Transmission Electron Microscopy reveals micron-sized droplets of PBS in the PLLA matrix with the GO nanofiller preferentially found in the PBS phase. The GO acts as nucleating agent for both semicrystalline polymers. The nanofiller nucleating effect is compared to the one of own selfnuclei for each polymer, to define a convenient nucleating efficiency (NE) scale. A value of around 80% is determined for GO towards PBS, among the highest NEs ever reported for this polymer. On the other hand, the efficiency in nucleating PLLA is equal to a modest 15%, also due to the uneven distribution of the nanofiller in the two polymers. A close relationship between the nanocomposite morphology and crystallization behavior of the two different polymers is thus established.

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Effect of organoclay as a compatibilizer in poly(lactic acid) and natural rubber blends

Cited by 48 publications

References 42 publications

Effect of nanoparticle localization on the rheology, morphology and toughness of nanocomposites based on poly(lactic acid)/natural rubber/nanosilica

Effect of nanoparticle localization on the rheology, morphology and toughness of nanocomposites based on poly(lactic acid)/natural rubber/nanosilica

Polylactide/organoclay nanocomposites: The effect of organoclay types on the structure development and the kinetic of cold crystallization

Correlating the morphology of poly(L-lactide)/poly(butylene succinate)/graphene oxide blends nanocomposites with their crystallization behavior

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