Interpenetrating polymer networks based on thermoplastic polyurethanes (TPUS) and <i>cis</i>‐1,4‐polyisoprene

Mishra, V.; Murphy, Charles J.; Sperling, L. H.

doi:10.1002/app.1994.070531104

Cited by 13 publications

(5 citation statements)

References 20 publications

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“…To determine the glass transition temperature, which was obtained from the midpoint of the endotherm of differential scanning calorimetry (DSC) curve or peak of the derivative heat capacity vs. temperature curve,31 a TA DSC Q 10 was used. Approximately 10–20 mg of sample, after uniaxial tensile test, was placed into a sealed alumina crucible and put inside the furnace under a blanket of nitrogen purging at a rate of 20 mL min −1 .…”

Section: Methodsmentioning

confidence: 99%

Rubber‐like thermosetting epoxy asphalt composites exhibiting atypical yielding behaviors

Kang

Chen

Jiao

et al. 2010

J of Applied Polymer Sci

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Rubber-like thermosetting epoxy asphalt composites (REACs) were prepared by curing epoxy resin (diglycidyl ether of bisphenol A) with curing agents system made up of maleated petroleum asphalt, adipic acid, and methylhexahydrophthalic anhydride. REACs' glass transition temperatures (T g ) and mechanics performances were investigated by differential scanning calorimetry (DSC) and universal tester, respectively. DSC results indicated that REACs had homogeneous phase structures, and their T g were lower than room temperature. Large elongation at break (e b ), as high as 150-286%, and atypical yielding behaviors similar to so-called ''hard elastic'' thermoplastics were observed simultaneously for the first time as to thermosetting epoxy composites at room temperature. The striking characteristics of REACs were ascribed to the formation of unique asphalt-filled bimodal networks, consisting of simultaneous cured maleated asphalt short-chain and dicarboxylic acid long-chain interpenetrating bimodal networks and wherewith filled unmaleated asphalt. The experimental results suggest that these inexpensive REACs may find promising applications in many engineering fields.

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Section: Methodsmentioning

confidence: 99%

Rubber‐like thermosetting epoxy asphalt composites exhibiting atypical yielding behaviors

Kang

Chen

Jiao

et al. 2010

J of Applied Polymer Sci

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“…This dipole cause interaction with many polar polymers. [17][18][19] PVC, by virtue of the weakly "acidic" or proton-donating ␣-hydrogen, has been shown to exhibit compatibility with a considerable number of polymers. The polymers that are compatible with PVC include butadiene-acrylonitrile copolymers, segmented polyether ester copolymers, poly(-caprolactone), and others.…”

Section: Dynamic Mechanical and Rheological Propertiesmentioning

confidence: 99%

Dynamic mechanical and morphological studies on the compatibility of plasticized PVC/thermoplastic polyurethane blends

Kim

Cho

1999

J. Appl. Polym. Sci.

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ABSTRACT:In this work, the compatibility of blends of plasticized poly(vinyl chloride) (p-PVC) and thermoplastic polyurethane (TPU) was investigated using a dynamic mechanical analyzer and scanning electron microscopy. Two kinds of TPU with different ratios of hard to soft segments, i.e., TPU90 and TPU70 were compared. p-PVC/ TPU90 and p-PVC/TPU70 blends with variable weight ratios (100/0, 90/10, 80/20, 70/30, 60/40, 50/50, 0/100) were prepared by melt blending. PVC was plasticized with 40 phr of dioctyl phthalate. It was found that TPU with a lower hard segment (i.e., TPU70) is more compatible with plasticized PVC than TPU with a higher hard segment (i.e., TPU90) in over the composition ranges examined. It was concluded that the compatibility of plasticized PVC and TPU are dependent on the ratio of hard to soft segments in TPU.

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“…The mould was kept at room temperature for 24 h for PU formation. Then, the temperature of the mould was slowly raised to 80 °C to polymerize acrylonitrile by sequential polymerization 22, 23. The transparent golden‐yellow to brown coloured PU/PAN IPNs were then taken out of the mould.…”

Section: Methodsmentioning

confidence: 99%

Free volume and the physico‐mechanical behaviour of polyurethane/polyacrylonitrile interpenetrating polymer networks: positron annihilation results

Kumar¹,

Siddaramaiah²,

Kumaraswamy

et al. 2005

Polymer International

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A series of semi‐interpenetrating polymer networks (SIPNs) of polyurethane (PU) and polyacrylonitrile (PAN) in the weight ratios 90/10, 70/30, 60/40 and 50/50 PU/PAN were prepared using polyethylene glycol, 4,4′‐diphenylmethane diisocyanate and acrylonitrile by sequential polymerization. Differential scanning calorimetry and scanning electron microscopy techniques were used to find the glass transition temperature and surface morphology of SIPNs. The tough and transparent SIPN films were characterized for physico‐mechanical properties such as density, surface hardness and tensile properties. Positron annihilation lifetime spectroscopy (PALS) was used to measure the free volume behaviour of the IPNs. The sorption behaviour of IPNs with benzene penetrant was also measured. An attempt was made to correlate the PALS results with the mechanical and sorption properties of the SIPNs. Copyright © 2005 Society of Chemical Industry

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Interpenetrating polymer networks based on thermoplastic polyurethanes (TPUS) and cis‐1,4‐polyisoprene

Cited by 13 publications

References 20 publications

Rubber‐like thermosetting epoxy asphalt composites exhibiting atypical yielding behaviors

Rubber‐like thermosetting epoxy asphalt composites exhibiting atypical yielding behaviors

Dynamic mechanical and morphological studies on the compatibility of plasticized PVC/thermoplastic polyurethane blends

Free volume and the physico‐mechanical behaviour of polyurethane/polyacrylonitrile interpenetrating polymer networks: positron annihilation results

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