Preparation and Properties of Polyurethane Nanocomposites with Organoclay or Nanosilica

Kim, B. K.; Seo, Jung Woo T.; Jeong, Han Mo

doi:10.1515/polyeng.2009.29.1-3.27

Journal of Polymer Engineering

2009

DOI: 10.1515/polyeng.2009.29.1-3.27

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Preparation and Properties of Polyurethane Nanocomposites with Organoclay or Nanosilica

B. K. Kim¹,

Jung Woo T. Seo²,

Han Mo Jeong³

Abstract: Polyurethane nanocomposites reinforced with organoclay or nanosilica were prepared by dispersing the filler during polymerization. The modulus and thermal stability of polyurethane were enhanced with the addition of fillers and the effect was more pronounced with organoclay than with nanosilica. The crystallization and damping behaviors showed that the mobility of polyurethane chain is restricted by the filler, and the effect was more evident with organoclay.

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Cited by 2 publications

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Electrical conductivity of carbon nanotube/polypropylene composites prepared through microlayer extrusion technology

Jiao

Xiong

et al. 2017

Journal of Polymer Engineering

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The morphological distribution of carbon nanotubes (CNTs) in polymer matrix has a crucial impact on the performance of CNT-filled polymer composites. A novel microlayer extrusion technology used in the dispersion and orientation of CNTs was proposed, and polypropylene (PP)/multiwalled CNT (MWCNT) composites with different numbers of layers were prepared with it. The MWCNT dispersion was investigated by scanning electron microscopy and Raman mapping method, and the MWCNT orientation was quantified by Raman spectroscopy. The influences of the dispersion and orientation of MWCNTs on the electrical conductivity and crystallization behavior of the composites were investigated. The results showed that the anisotropic conducting properties of the multilayered composites varied distinguishably with the increase of layer numbers and rotation speed. Furthermore, the degree of crystallinity of PP increased when the layer number increased from 1 to 729. All of these results suggest that with the increase of the layer numbers and the rotation speed, the dispersion and orientation of MWCNTs in PP matrix improve greatly. Overall, we provide an efficient and practical approach to control the dispersion and orientation of CNT in polymer matrix, which has a promising application prospect in the field of plastic processing.

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Electrical conductivity of carbon nanotube/polypropylene composites prepared through microlayer extrusion technology

Jiao

Xiong

et al. 2017

Journal of Polymer Engineering

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Preparation and properties of PLA/long alkyl chain modified multi-walled carbon nanotubes nanocomposites

Shih

Wang

Hsieh

2011

Journal of Polymer Engineering

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In this investigation, poly(lactic) acid (PLA)/multi-walled carbon nanotubes (CNTs) hybrids were prepared using a melt blending process. To increase the compatibility between CNTs and PLA, the surfaces of the CNTs were fi rstly pretreated in acid solution (HNO 3 ) to functionalize them with carboxylic groups (-COOH). Then, stearyl alcohol was grafted onto carboxylic groups using a dehydrating agent, N,N ′ -dicyclohexylcarbodiimide. Chemically modifi ed CNTs (CNT-C18) were thus obtained. Therefore, modifi ed carbon nanotubes (CNT-C18) dispersed excellently in organic solvents. PLA/CNTs nanocomposites were prepared by the meltblending method. Experimental results reveal that the PLA/ CNT-C18 nanocomposites that consisted of well-dispersed nanotubes exhibited enhanced thermal and mechanical properties. Adding 4 wt % CNT-C18 to a nanocomposite increased the storage modulus ( E ′ ) at 40 ° C by 17.8 % , and the loss modulus ( E ″ ) at the glass transition temperature ( T g ) by 15.1 % . Adding 3 wt % CNT-C18 also reduced the surface resistivity of the PLA nanocomposites from > 10 16 Ω /cm 2 to 10 4 Ω /cm 2 . Such PLA/CNT-C18 nanocomposites are highly effi cient in anti-static agents and can be exploited in the outer coverings of electronic devices.

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Preparation and Properties of Polyurethane Nanocomposites with Organoclay or Nanosilica

Cited by 2 publications

References 8 publications

Electrical conductivity of carbon nanotube/polypropylene composites prepared through microlayer extrusion technology

Electrical conductivity of carbon nanotube/polypropylene composites prepared through microlayer extrusion technology

Preparation and properties of PLA/long alkyl chain modified multi-walled carbon nanotubes nanocomposites

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