Impact of moisture curing conditions on the chemical structure and rheological and ultimate adhesion properties of polyurethane adhesives based on castor oil and cellulose acetate

Abstract The bulk and surface properties of blocks of nine Australian wood species of commercial importance were investigated to elucidate the factors affecting timber gluability with structural one-component polyurethane adhesives. Cross-lap joints were prepared from freshly sanded blocks and the joints were subjected to creep loading in a condensing humidity environment. The median tensile strength (MTS) of the joints was found to improve with decreasing phenolic extractives content, lower timber density and decreasing lipophilic surface extractives content. The latter was assessed from O/C atomic ratios of the timber surfaces determined by X-ray photoelectron spectroscopy (XPS). The content of bulk lipophilic extractives and lignins and wettability of the surface as determined by the sessile drop method did not reveal significant correlations with the adhesion properties. The adhesion tests indicated significant gluability differences between the species investigated.

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Castor oil-derived plasticizers. Some nitrogen-containing derivatives as plasticizers for vinyl chloride-vinyl acetate copolymer and cellulose acetate resins

Journal of the American Oil Chemists Society ◽

10.1007/bf02640274 ◽

1959 ◽

Vol 36 (12) ◽

pp. 635-637 ◽

Cited By ~ 3

Author(s):

Frank C. Magne ◽

Harold P. Dupuy ◽

Leo A. Goldblatt

Keyword(s):

Cellulose Acetate ◽

Vinyl Acetate ◽

Vinyl Chloride ◽

Castor Oil ◽

Acetate Copolymer

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Influence of Diisocyanate Chemical Structure on the Properties, Degradation and Cytotoxicity of Polyurethanes Obtained from Castor Oil

Journal of Biomaterials and Tissue Engineering ◽

10.1166/jbt.2018.1729 ◽

2018 ◽

Vol 8 (2) ◽

pp. 279-289 ◽

Cited By ~ 1

Author(s):

Jeimmy C. Ibarra ◽

Yomaira L. Uscátegui ◽

Fabián R. Arévalo ◽

Luis E. Díaz ◽

Manuel F. Valero

Keyword(s):

Castor Oil ◽

Chemical Structure

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Morphological studies on renewable castor oil-based nanocomposites with modified clay and MWCNTs as fillers

Polymers and Polymer Composites ◽

10.1177/0967391120935240 ◽

2020 ◽

pp. 096739112093524

Author(s):

Anupama Mogha ◽

Anupama Kaushik

Keyword(s):

Electron Microscopy ◽

Castor Oil ◽

Chemical Structure ◽

Morphological Analysis ◽

X Ray Diffraction ◽

Multiwalled Carbon ◽

X Ray ◽

Morphological Studies ◽

Transmission Electron ◽

Commercial Applications

This research presents an analysis of castor oil-based polymer nanocomposites that can be used for numerous commercial applications. Due to the versatile chemical structure of castor oil, it can replace the petrochemical products and hence can be optimized as nontoxic bioresource for the production of nanocomposites with the incorporation of nanofillers in small quantities. It can be directly used as polyol resource without any chemical alteration for synthesis of polyurethane (PU) nanocomposites. The prepared PU nanocomposites were characterized by scanning electron microscopy (SEM), Fourier transform infrared (FTIR) spectroscopy, wide angle X-ray diffraction, transmission electron microscopy (TEM), and mechanical properties. The compositional and structural studies indicate the formation of PU linkages and well dispersion of clay and multiwalled carbon nanotubes between the polymer–nanofiller phase, as shown by the morphological analysis using TEM. Also, there is an increase in the tensile strength and Young’s modulus values with the increase in the filler content.

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