Synthesis and characterization of castor oil urethane triamine networks

Saikumar, C.; Rajadurai, S.

doi:10.1002/app.1987.070340219

Cited by 7 publications

(4 citation statements)

References 9 publications

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“…interaction parameter which was calculated using the Equation [11]: The degree of crosslinking (v) and number of chains per unit volume (N) were also calculated using the following relations [12,13]:…”

Section: Results and Disussionmentioning

confidence: 99%

The Effect of Chain Length of Polyethylene Glycol on Properties of Castor Oil Based Polyurethane Elastomers

Bharadwaj

Somani

Kansara

2002

Journal of Macromolecular Science, Part A

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Polyurethane (PU) elastomers from castor oil based polyol, polyethylene glycol (PEG) of various molecular weight (200, 400, and 600) and toluene diisocyanate were prepared in the form of transparent sheets. The sorption, mechanical and thermal properties have been studied. The solubility parameter, molecular weight between two crosslinks and degree of crosslinking of PU samples were calculated from equilibrium swelling experiments. The kinetic study of swelling revealed that sorption is anomalous in nature in all the samples. Diffusion coefficient (D) and sorption coefficient (S) were found to decrease with an increase in chain length of PEG. The stress-strain data showed that the elastomers obtained using PEG-200 gave the best mechanical properties. The thermal degradation of all elastomers starts at $ 250 C, regardless of the PEG chain length. The values of activation energy of degradation were in the range of 60À72 kJ=mole.

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Section: Results and Disussionmentioning

confidence: 99%

The Effect of Chain Length of Polyethylene Glycol on Properties of Castor Oil Based Polyurethane Elastomers

Bharadwaj

Somani

Kansara

2002

Journal of Macromolecular Science, Part A

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“…1,2 The petrochemicalbased monomers used in the manufacturing of polymers, due to their spiraling prices, high rate of depletion of petroleum stocks, as well as carcinogenicity, need to be replaced by polymers derived from sustainable and eco-friendly resources like vegetable seed oils. [3][4][5][6] N,N-bis-(2 hydroxyethyl) oil fatty amides have been used as monomer in the preparation of many oilbased polyesteramide (PEA) resins by reaction with dibasic acids or anhydrides.…”

Section: Introductionmentioning

confidence: 99%

“…Fatty acids from linseed and other vegetable oils have long been used as a sustainable resource in the production of industrially important decorative and anticorrosive coating materials 1, 2. The petrochemical‐based monomers used in the manufacturing of polymers, due to their spiraling prices, high rate of depletion of petroleum stocks, as well as carcinogenicity, need to be replaced by polymers derived from sustainable and eco‐friendly resources like vegetable seed oils 3–6…”

Section: Introductionmentioning

confidence: 99%

Ambient‐cured polyesteramide‐based anticorrosive coatings from linseed oil—A sustainable resource

Zafar

Sharmin

Ashraf

et al. 2005

J of Applied Polymer Sci

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Ambient-cured polyesteramide (APEA) coating resin synthesized from dihydroxy fatty amide obtained from linseed oil, a sustainable resource, and poly(styrene-co-maleic anhydride), a bifunctional acid component, was found to exhibit improved physicomechanical and anticorrosive properties. The structural elucidation of APEA resin has been carried out by FTIR, 1 H-NMR, and 13 C-NMR spectroscopies. The physicomechanical and chemical resistance properties were investigated by standard methods. The corrosion resistance performance was evaluated in acid, alkali, and organic solvent. The thermal behavior was studied by TGA technique. A comparative study of these properties of APEA with reported baked polyesteramide (PEA) coatings was carried out. A remarkable improvement in the drying property of APEA was observed. The APEA coatings also showed improved physicomechanical and anticorrosive properties as compared to the baked PEA coatings.

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“…[1][2][3] Generally, polyesteramide coatings are obtained by baking at and above 175°C. 4,5 To improve the physicomechanical and anticorrosive characteristics of baked coatings, we incorporated aluminum in the backbone of the polymer. 6 We found that the aforementioned properties of the coatings were enhanced appreciably in the case of alumina-filled polyesteramides.…”

Section: Introductionmentioning

confidence: 99%

Studies on urethane‐modified alumina‐filled polyesteramide anticorrosive coatings cured at ambient temperature

Ahmad

Ashraf

Hasnat

et al. 2001

J of Applied Polymer Sci

106

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ABSTRACT:Coatings prepared from polyesteramide resin synthesized from linseed oil, a renewable resource, have been found to show improved physicomechanical and anticorrosive characteristics. These properties are further improved when aluminum is incorporated in the polyesteramide resin. The coatings of this resin are generally obtained by baking at elevated temperatures. With a view toward the use of linseed oil, as a precursor for the synthesis of polyesteramide resins and to cure their coatings at ambient temperature, toluylene diisocyanate (TDI) was incorporated into polyesteramide and alumina-filled polyesteramide in varying proportions to obtain urethane-modified resins. The latter resins were found to cure at room temperature. The broad structural features of the urethane-modified polyesteramide and alumina-filled polyesteramide were confirmed by FTIR and 1 H-NMR spectroscopies. Scratch hardness; impact resistance; bending resistance; specular gloss; and resistance to acid, alkali, and organic solvents of the coatings of these resins were determined by standard methods. Physicomechanical and anticorrosive properties, specular gloss, and thermal stability of the urethane-modified alumina-filled polyesteramide coatings were found to be at higher levels among these resins. It was found that TDI could be incorporated in polyesteramide up to only 6 wt %, such that above this loading its properties started to deteriorate, whereas alumina-filled polyesteramide could take up to 10 wt % TDI. Explanation is provided for the increase in scratch hardness and impact resistance above 6 and 10 wt % addition of TDI in polyesteramide and alumina-filled polyesteramide, respectively, as well as for the decrease in flexibility and resistance to solvents, acid, and alkali of coatings of these resins above these limits of TDI addition.

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Synthesis and characterization of castor oil urethane triamine networks

Cited by 7 publications

References 9 publications

The Effect of Chain Length of Polyethylene Glycol on Properties of Castor Oil Based Polyurethane Elastomers

The Effect of Chain Length of Polyethylene Glycol on Properties of Castor Oil Based Polyurethane Elastomers

Ambient‐cured polyesteramide‐based anticorrosive coatings from linseed oil—A sustainable resource

Studies on urethane‐modified alumina‐filled polyesteramide anticorrosive coatings cured at ambient temperature

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