Polyhedral oligomeric silsesquioxane-reinforced polyurethane acrylate

Kim, E.H.; Myoung, Sang-Won; Jung, Yeon‐Gil; Paik, Ungyu

doi:10.1016/j.porgcoat.2008.07.026

Cited by 50 publications

(26 citation statements)

References 16 publications

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“…The initial increase in glass transition temperature is attributed to the ability of the functionalised-POSS to restrict molecular relaxation motions and bond rotations of the polymer chains. The decrease in loss (and storage) modulus at higher POSS concentrations has been observed previously [7,35] and suggests that POSS exhibits a plasticising effect at sufficiently high levels. POSS agglomeration at concentrations greater than 5 wt% is also believed to be responsible for the decrease in moduli and T g , as suggested by Kim et al [35].…”

Section: Creep-recovery Analysissupporting

confidence: 75%

“…The decrease in loss (and storage) modulus at higher POSS concentrations has been observed previously [7,35] and suggests that POSS exhibits a plasticising effect at sufficiently high levels. POSS agglomeration at concentrations greater than 5 wt% is also believed to be responsible for the decrease in moduli and T g , as suggested by Kim et al [35]. As displayed in Table 7, composites containing isobutylPOSS displayed the greatest increase in T g for the butadiene phase, with ibPOSS-blue 5 and ibPOSS-red 5 yielding T g values of -70 and -71°C, respectively.…”

Section: Creep-recovery Analysissupporting

confidence: 75%

“…The observed reduction in modulus is most probably caused by such reasons, that may be induced by filler agglomeration affecting the SBSfiller mechanisms that would normally provide good reinforcement. The agglomeration of pigment-pigment clusters, along with reduced effective crosslinking densities and potential voids deteriorate the mechanical properties, resulting in decreased modulus values [35,36]. Furthermore, agglomerated pigment clusters can act as stress concentrators, causing premature mechanical failure.…”

Section: Thermomechanical Analysis 351 Stress-strain Analysismentioning

confidence: 99%

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Novel elastomer dye-functionalised POSS nanocomposites: Enhanced colourimetric, thermomechanical and thermal properties

Spoljaric¹,

Shanks²

2012

Express Polym. Lett.

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Abstract. Nanocomposites consisting of poly(styrene-b-butadiene-b-styrene) (SBS) and polyhedral oligomeric silsesquioxanes (POSS) were prepared using a solvent dispersion method. POSS molecules were functionalised with two dichlorotriazine reactive dyes (CI Reactive Blue 4, CI Reactive Red 2) prior to compounding. Infrared spectroscopy confirmed functionalisation. Scanning electron microscopy revealed an increase in filler aggregation with concentration, with preferential phase selectivity. Ultraviolet spectroscopy and colourimetry confirmed colour uniformity and suggested that colour intensity could be controlled. Functionalised POSS improved thermal stability by imparting restrictions on SBS chain motions. Tensile stress-strain analysis revealed an increase in modulus with filler concentration, while creep deformation decreased and permanent strain increased with POSS content. Storage modulus, loss modulus and glass transition temperature increased with filler content due to effective SBS-POSS interaction. Nanocomposite properties were influenced by the phase the filler was dispersed throughout and the structure of the dye chromophore.

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Section: Creep-recovery Analysissupporting

confidence: 75%

Section: Creep-recovery Analysissupporting

confidence: 75%

Section: Thermomechanical Analysis 351 Stress-strain Analysismentioning

confidence: 99%

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Novel elastomer dye-functionalised POSS nanocomposites: Enhanced colourimetric, thermomechanical and thermal properties

Spoljaric¹,

Shanks²

2012

Express Polym. Lett.

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“…Using N,N-dimethylformamide (DMF) as a solvent, Kim et al 82 synthesized a PU prepolymer of terminated methacrylate. All PU films were cured by UV with octavinyl POSS as a crosslinking agent.…”

Section: Vinyl-possmentioning

confidence: 99%

POSS/Polyurethane Hybrids and Nanocomposites: A Review on Preparation, Structure and Performance

Diao¹,

Mao²,

Zhang³

et al. 2015

Elastomers and Composites

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Polyhedral oligomeric silsesquioxane (POSS) is an important inorganic-organic hybrid material with a threedimensional structure. Polyurethane (PU) is a widely applied polymer that has versatile properties with the change of two phase structure. When POSS is incorporated into PU by physical or chemical methods, many properties can be greatly improved, such as mechanical properties, thermal stability, biodegradation resistance, and water resistance. This paper reviews the recent progress in preparation, structure, and performance of POSS-modified polyurethane from the viewpoint of physical blending and chemical modification.

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“…According to these characteristics, some methods have been used for the modification of WPU with acrylic resin. [6][7][8] The modified WPU emulsions had the advantages of both PU and PA; therefore, it is known as a thirdgeneration WPU. [9][10][11] In recent years, hybrid particles consisting of an inorganic core and a polymer shell, because of the possibility of combining the advantages of different materials, have attracted much attention from material scientists and researchers.…”

Section: Introductionmentioning

confidence: 99%

Preparation, characterization, and properties of environmentally friendly waterborne poly(urethane acrylate)/silica hybrids

Qiu

et al. 2010

J of Applied Polymer Sci

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A series of environmentally friendly waterborne poly(urethane acrylate) (WPUA)/silica (SiO 2 ) hybrids were synthesized by a sol-gel process on the basis of isophorone diisocyanate, polyester polyol (GE-210), dimethylpropionic acid, butyl acrylate and methyl methacrylate monomers, tetraethoxysilane (TEOS), and 3-glycidyloxypropyl trimethoxysilane (GLYMO) as a coupling agent. The mechanical properties of the WPUA/SiO 2 hybrids were investigated through tensile and hardness tests. Fourier transform infrared spectroscopy, scanning electron microscopy, transmission electron microscopy, atomic force microscopy, and X-ray diffraction were used to assess the fracture surface morphology and the dispersions of the WPUA/SiO 2 hybrids. The strength and hardness values of the WPUA/SiO 2 hybrids were improved significantly. This was attributed to the synergistic effect of WPUA, GLYMO, and TEOS. The results show that SiO 2 particles of the membranes had a uniform dispersion and formed an excellent interfacial bonding layer on their surfaces. The prepared hybrids showed good thermal stability and mechanical properties in comparison with pure WPUA and showed tunable transparence with the SiO 2 fraction in the film. Through suitable adjustment of the TEOS content, some thin hybrids have potential applications as specialty materials.

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Polyhedral oligomeric silsesquioxane-reinforced polyurethane acrylate

Cited by 50 publications

References 16 publications

Novel elastomer dye-functionalised POSS nanocomposites: Enhanced colourimetric, thermomechanical and thermal properties

Novel elastomer dye-functionalised POSS nanocomposites: Enhanced colourimetric, thermomechanical and thermal properties

POSS/Polyurethane Hybrids and Nanocomposites: A Review on Preparation, Structure and Performance

Preparation, characterization, and properties of environmentally friendly waterborne poly(urethane acrylate)/silica hybrids

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