Isocyanate terminated castor oil-based polyurethane prepolymer: Synthesis and characterization

Gurunathan, T.; Mohanty, Smita; Nayak, Sanjay K.

doi:10.1016/j.porgcoat.2014.11.017

Cited by 152 publications

(112 citation statements)

References 36 publications

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“…The stretching vibrations of C=O groups are presented in the range from 1680 to 1740 cm -1 , and double peak is visible. The maximum of peak connected with the hydrogen-bonded carbonyl groups is observed at 1700 cm -1 , while maximum at 1725 cm -1 is related to free carbonyl groups [46][47][48]. The band observed at 1595 cm -1 is attributed to the out-ofplane bending of -NH.…”

Section: Bio-pdomentioning

confidence: 92%

Synthesis, structure and properties of poly(ester-urethane)s obtained using bio-based and petrochemical 1,3-propanediol and 1,4-butanediol

Datta

Kasprzyk

Błażek

et al. 2017

J Therm Anal Calorim

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In this paper, the poly(ester-urethane)s obtained using petrochemical and bio-based chain extenders were prepared and characterized. The influence of glycols' origin on the chemical structure, mechanical and thermal properties of the prepared polyurethanes was studied. The materials were synthesized by prepolymer method. The first step involved the reaction of a,x-dihydroxy(ethylenebutylene adipate) (POLIOS 55/20) with 4,4 0 -diphenylmethane diisocyanate (MDI). In the next step, obtained prepolymer terminated with isocyanate group was extended using 1,3-propanediol and 1,4-butanediol at three different molar ratios of NCO group (presented in prepolymer chains) to OH groups (presented in chain extender structure), i.e., 0.95, 1.0 and 1.05. The results showed that applying the different types (diversified chemical structure and origin) of glycols results in obtaining materials with diversified mechanical properties and slight different thermal stabilities. The results of Fourier transform infrared spectroscopy showed that the chemical structure of the obtained polyurethanes was not affected by the presence of glycols with the same chemical structure and different origins (petrochemical and bio-based nature).

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Section: Bio-pdomentioning

confidence: 92%

Synthesis, structure and properties of poly(ester-urethane)s obtained using bio-based and petrochemical 1,3-propanediol and 1,4-butanediol

Datta

Kasprzyk

Błażek

et al. 2017

J Therm Anal Calorim

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“…MCO1 and MCO2 show increase in this band intensity (Figure 3b), which is related to hydroxyl value increasing after modification. Other characteristic absorption bands are observed at 2920 cm -1 (methyl), 2850 cm -1 (methylene), 1740 cm -1 (esters) and 1161 cm -1 (C-O-C) [23][24][25][26]. Figure 4 compares the FTIR spectra of PU-CO, PU-MCO1 and PU-MCO2.…”

Section: Scanning Electron Microscopy (Sem)mentioning

confidence: 99%

“…It is associated to the soft segment and depends on its structure and three-dimensional arrangement [33]. The third one is above 380°C and is also related to other remaining structures formed after the second decomposition, diisocyanate and lignin aromatic rings [1,25,34]. Figure 6 shows the TGA and derivative curves of PU-CO, PU-MCO1 and PU-MCO2, respectively.…”

Section: Thermogravimetric Analysis (Tga)mentioning

confidence: 99%

Bio-based polyurethane prepared from Kraft lignin and modified castor oil

Tavares¹,

Boas²,

Schleder³

et al. 2016

Express Polym. Lett.

114

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Abstract. Current challenges highlight the need for polymer research using renewable natural sources as a substitute for petroleum-based polymers. The use of polyols obtained from renewable sources combined with the reuse of industrial residues such as lignin is an important agent in this process. Different compositions of polyurethane-type materials were prepared by combining technical Kraft lignin (TKL) with castor oil (CO) or modified castor oil (MCO1 and MCO2) to increase their reactivity towards diphenylmethane diisocyanate (MDI). The results indicate that lignin increases the glass transition temperature, the crosslinking density and improves the ultimate stress especially for those prepared from MCO2 and 30% lignin content from 8.2 MPa (lignin free) to 23.5 MPa. Scanning electron microscopy (SEM) micrographs of rupture surface after uniaxial tensile tests show ductile-to-brittle transition. The results show the possibility to develop polyurethane-type materials, varying technical grade Kraft lignin content, which cover a wide range of mechanical properties (from large elastic/low Young modulus to brittle/high Young modulus polyurethanes).

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“…Renewable substances proposed for the synthesis of polymers are, for example, vegetable oils (e.g., linseed oil, sunflower oil, palm oil, cotton oil, soybean oil, tung oil, cashew nut oil [5][6][7][8]), glycerol and its derivatives [9,10], terpenes [11] and rosin [12,13]. The bio-based components, which can be used as a polyols in the synthesis of polyurethanes, are, for example, castor oil [14], polyricinoleate diol [15], hydroxylated soybean oil [6,16], hydroxylated hemp seed oil [17] and polyglycerols [18]. Bio-based trends are also visible in the synthesis of isocyantes [19].…”

Section: Introductionmentioning

confidence: 99%

“…The chemical modification of vegetable oils involves, for example, epoxidation of unsaturated bonds followed by hydroxylation [6,23]. Vegetable oil offers the intrinsic properties, i.e., reduced toxicity, low cost, high purity and renewable nature [6,14,24]. Moreover, chemical modified vegetable oils, as well as glycerol, can be useful in the synthesis of multifunctional polyols.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, structure and properties of poly(ether-urethane)s synthesized using a tri-functional oxypropylated glycerol as a polyol

Datta

Kosiorek

Włoch

2016

J Therm Anal Calorim

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The main aim of this work was to obtain poly(ether-urethane)s using tri-functional polyoxyalkylene polyol (Rokopol G1000), which introducing the chemical cross-links into the structure of polyurethanes. Poly(etherurethane)s were prepared using two-step method, called prepolymer method, which involves in the first step the reaction of 4,4 0 -diphenylmethane diisocyanate (MDI) and tri-functional polypropylene glycol glycerol triether polyol. In the second step, prepolymer chains were extended by using: 1,6-hexanediol, 1,4-butanediol in the mixture with poly(ethylene glycol) and poly(ethylene glycol). The prepolymer chains extending was realized at three different molar ratios of NCO groups (presented in prepolymer) to OH groups (presented in chain extender), i.e., 0.95, 1.00 or 1.05. The influence of chain extender type on the chemical structure, selected mechanical properties and thermomechanical properties of the obtained poly(ether-urethane)s was investigated. The results showed that applying different types of chain extenders results in obtaining materials with diversified mechanical properties, but very similar thermal stability. The performance of obtained poly(etherurethane)s is mostly affected by the chemical cross-links, which were introduced into soft segments by tri-functional polyetherol.

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Isocyanate terminated castor oil-based polyurethane prepolymer: Synthesis and characterization

Cited by 152 publications

References 36 publications

Synthesis, structure and properties of poly(ester-urethane)s obtained using bio-based and petrochemical 1,3-propanediol and 1,4-butanediol

Synthesis, structure and properties of poly(ester-urethane)s obtained using bio-based and petrochemical 1,3-propanediol and 1,4-butanediol

Bio-based polyurethane prepared from Kraft lignin and modified castor oil

Synthesis, structure and properties of poly(ether-urethane)s synthesized using a tri-functional oxypropylated glycerol as a polyol

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