DSC Study of Polyurethanes obtained from 4,4'-Bis(10-Hydroxydecaoxy)biphenyl

Haponiuk, Józef T.; Strankowski, Michał; Łazarewicz, T.

doi:10.1023/b:jtan.0000005201.12216.dd

Cited by 7 publications

(7 citation statements)

References 13 publications

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“…DSC has been widely used to study thermoset reactions in both isothermal and nonisothermal modes 14–23. Kinetic analysis by DSC assumes that the amount of heat generated from a reaction (Δ H T ) is directly proportional to the degree of cure (or the extent of reaction) and therefore the rate of cure d α /d t can be related to the heat generated by the following equation 24…”

Section: Introductionmentioning

confidence: 99%

Reaction Kinetics of Polyurethane Formation Using a Commercial Oligomeric Diisocyanate Resin Studied by Calorimetric and Rheological Methods

Papadopoulos

Ginic‐Markovic

Clarke

2008

Macro Chemistry & Physics

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Reaction rate and kinetics of cure between PMDI and castor oil, a tri‐functional polyol, for stoichiometric and off‐stoichiometric mole ratios, were studied through isoconversional analysis of DSC data and through gelation times and viscosity build up obtained through rheological techniques. The cure kinetics of the polyurethane reaction as monitored using different techniques gave similar activation energies for the stoichiometric ratio. Isoconversional analysis of DSC data showed a competitive reaction scheme for the stoichiometric system, suggesting the presence of isocyanate groups with different reactivities in the PMDI, which was further substantiated in rheological investigations.magnified image

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Section: Introductionmentioning

confidence: 99%

Reaction Kinetics of Polyurethane Formation Using a Commercial Oligomeric Diisocyanate Resin Studied by Calorimetric and Rheological Methods

Papadopoulos

Ginic‐Markovic

Clarke

2008

Macro Chemistry & Physics

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“…Penczek and co-workers investigated the influence of a 4,4'-bis(2-hydroxyethoxy)biphenyl (BH2) amount [8] and a high molecular diol length [9] on segmented PUs properties and microphase structure. PUs from BHn and other aromatic diisocyanates [3,5,6,[11][12][13] and aliphatic diisocyanates [2,5,11,13,14] were reported as well. Sun and Chang [13] described segmented PUs from 4,4'-bis(3-hydroxypropyloxy)biphenyl (BH3), poly(oxytetramethylene)glycol and 4,4'-methylenebis(cyclohexyl isocyanate) (HMDI).…”

Section: Introductionmentioning

confidence: 97%

“…Some PUs based on BHn are thermoplasts due to relatively low melting point of polymers in which macromolecules contain only short rigid mesogenic 4,4'-bis(oxy)biphenyl moieties. Both non segmented [1][2][3][4][5][6][7] and block [8][9][10][11][12][13][14] polymers have been described. Intensive work was focused on PUs based on tolylene 2,4-diisocyanate (TDI) [1][2][3][4][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

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The influence of 4,4’-bis(6-hydroxyhexoxy)biphenyl moieties on properties of polyurethanes based on 4,4’-methylenebis(cyclohexyl isocyanate)

2006

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Two series of polyurethanes (PUs) were synthesized from a low molecular weight diol -4,4'-bis(6-hydroxyhexoxy)biphenyl (BH6), a high molecular weight diol -poly(1,6-hexylene adipate)diol (PHA) and 4,4'-methylenebis (cyclohexyl isocyanate) (HMDI) using two fractions of different trans,trans isomer content (u T ), respectively: 16%, 46%. The effect of low molecular diol content (u B ) in the total mass of the diols used for synthesis on properties of PUs was investigated by DSC, DTA, TGA, polarization microscopy, WAXS, DMTA and tensile testing.

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“…decreased combustibility. That is why researches are still being conducted to achieve lower costs of producing polyurethanes and improve their properties [3][4][5][6] . Polyols should also be eco-friendly.…”

Section: Introductionmentioning

confidence: 99%

Different catalysts for new polyols for rigid PUR-PIR foams

Liszkowska

Czupryński

Paciorek‐Sadowska

2015

Polish Journal of Chemical Technology

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New polyols were synthesized with 2-hydroxypropane-1.2.3-tricarboxylic acid and butane-1,4-diol (1.4-BD). The synthesis was performed using different catalysts in the amount of 0.1%. Used catalyst: Tyzor TPT, tin(II) acetate, sulfuric(IV) acid. The fourth reaction was conducted without the use of a catalyst. The polyols' properties were evaluated with regards to the usefulness in rigid polyurethane-polyisocyanurate (PUR-PIR) foams (acid value, density, pH and solubility, FTIR spectra). Based on the research, it was evaluated that only the polyol synthesized using Tyzor TPT (E6) was useful in production of rigid PUR-PIR foams. Its hydroxyl number was 496 mgKOH/g and its viscosity was about 14 552 mPa · s. A series of fi ve foams P6.1-P6.5 was produced with this polyol. Rigid foams test results indicated that the amount of this compound in the foam substantially affects its compressive strength, density and their retention. The foams have low brittleness values.

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DSC Study of Polyurethanes obtained from 4,4'-Bis(10-Hydroxydecaoxy)biphenyl

Cited by 7 publications

References 13 publications

Reaction Kinetics of Polyurethane Formation Using a Commercial Oligomeric Diisocyanate Resin Studied by Calorimetric and Rheological Methods

Reaction Kinetics of Polyurethane Formation Using a Commercial Oligomeric Diisocyanate Resin Studied by Calorimetric and Rheological Methods

The influence of 4,4’-bis(6-hydroxyhexoxy)biphenyl moieties on properties of polyurethanes based on 4,4’-methylenebis(cyclohexyl isocyanate)

Different catalysts for new polyols for rigid PUR-PIR foams

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