Properties of crosslinked polyurethanes synthesized from 4,4′‐diphenylmethane diisocyanate and polyester polyol

Jung, Hyung Chul; Kang, Shin-Jin; Kim, W. N.; Lee, Y.‐B.; Choe, Kun Hyung; Hong, Seongho; Kim, S.‐B.

doi:10.1002/1097-4628(20001017)78:3<624::aid-app180>3.3.co;2-f

Cited by 2 publications

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“…6b, it is observed that the PUCO60 shows highest compression strength and compression resilience compared to corresponding polymer with lower castor oil content. This is more likely attributed to the difference in their density which is believed to have significant influence on the mechanical properties [42,43]. Castor oil acts as crosslinking agent.…”

Section: Optical Microscope Images Of Puco Foamsmentioning

confidence: 99%

Synthesis of bio-castor oil polyurethane flexible foams and the influence of biotic component on their performance

et al. 2015

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A series of bio-based polyurethane flexible foams were synthesized by substituting polyether polyol with castor oil and polyethylene glycol (PEG). The influence of the castor oil component in the prepolymers on the structure and properties of the castor oil-based polyurethane flexible foams were investigated and compared. FTIR (Fourier transform infrared spectroscopy) results confirmed that bio-based polyurethane was successfully synthesized by castor oil, PEG and MDI (diphenyl methane diisocyanate), and its urethane group content decreased as the castor oil content increased from 40 to 60 wt.%. TG (thermogravimetry) and DTG (derivative thermogravimetry) results showed that the thermal degradation of the bio-based polyurethane flexible foams occurred at about 150, 320 and 420°C. The Young's modulus improved from 0.196 to 1.235 KPa and the compression resilience improved from 97.76 to 99.65 % with increased content of castor oil. Moreover, these bio-based foams exhibited lower water absorption and higher contact angle with increased castor oil content.

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Section: Optical Microscope Images Of Puco Foamsmentioning

confidence: 99%

Synthesis of bio-castor oil polyurethane flexible foams and the influence of biotic component on their performance

et al. 2015

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“…The foam expanded to fill the entity until it was compressed by the lid. The foam obtained was post-cured in an oven for 4 h at 100 C in order to increase the cross-link density, T g , and the mechanical strength of RPUF [15]. In this work, the density of the foams was controlled to 0.45-0.52 g/cm 3 approximately.…”

Section: Processing Of Foamsmentioning

confidence: 99%

Morphology and Mechanical Properties of Nylon-1010-filled Rigid Polyurethane Foams

Yin

Quan

et al. 2004

Journal of Elastomers & Plastics

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A preliminary study on the influences of the nylon-1010 powder, as a new candidate for fillers, on the cellular structure and mechanical properties of rigid polyurethane foam (RPUF) is presented. By observation of the scanning electron micrographs, it was found that the cells of the nylon powder-filled RPUF were mainly spheroid. When the nylon content was 5 wt%, the nylon particles were dispersed rather uniformly, whereas when the nylon content exceeded 10 wt%, the particles were hard to disperse in the matrix, and formed agglomerates. The compressive and tensile strengths of the unfilled RPUF exhibited a power-law dependence with respect to density of the foam: * ¼ (*) n . The measured tensile modulus of the unfilled RPUF was described well by a simple geometric model. The compressive modulus was also found to follow a power-law behavior with respect to foam density. Addition of 5 wt% nylon powder increased the tensile modulus and strength, but without a change in the density dependence. It can be found that the tensile modulus of the foam with 5 and 10 wt% nylon powder fit the predicted model well, but, at the filler concentration of 15 and 20 wt%, the power-law behavior did not work.

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Properties of crosslinked polyurethanes synthesized from 4,4′‐diphenylmethane diisocyanate and polyester polyol

Cited by 2 publications

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Synthesis of bio-castor oil polyurethane flexible foams and the influence of biotic component on their performance

Synthesis of bio-castor oil polyurethane flexible foams and the influence of biotic component on their performance

Morphology and Mechanical Properties of Nylon-1010-filled Rigid Polyurethane Foams

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