Poss-containing nanocomposites based on polyurethane/poly(hydroxypropyl methacrylate) polymer matrix: dynamic mechanical properties and morphology

Karabanova, L. V.; Honcharova, L.A.; Babkina, N. V.; Sapsay, V.I.; Klymchuk, D. O.

doi:10.1016/j.polymertesting.2018.06.012

Cited by 13 publications

(3 citation statements)

References 18 publications

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“…As the mixing temperature increasing from 25 to 50 °C, the gelation time of low viscosity PH-50 extends and then reduces in Figure 3 b. The higher the mixing temperature, the lower the viscosity and the faster the reaction of the mixture due to the thermally initiated polymerization of HPMA [ 24 ]. At 30 °C, it is possible to obtain an ideal PU prepolymer for blade infusion with both low viscosity (<600 MPa·s) and a long filling time (>120 min).…”

Section: Resultsmentioning

confidence: 99%

“…There are many ways to extend the gelation time of PU to obtain the dense cross-linking structure, such as adjusting the ambient temperature, increasing the molecular weight of the soft segment and adding some materials to slow down the reaction [ 22 , 23 ]. Among them, reacting PU prepolymers with some special monomers should be an effective option [ 24 ]. The monomer used for the reaction should have polymeric groups and the ability to react with isocyanate.…”

Section: Introductionmentioning

confidence: 99%

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Efficient Regulation of the Cross-Linking Structure in Polyurethane: Achieving Outstanding Processing and Mechanical Properties for a Wind Turbine Blade

Jiang,

Li,

et al. 2024

Polymers

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Although epoxy resin has been extensively used in the field of wind turbine blades, polyurethane has attracted much attention in recent years, due to its potential value of better fatigue resistance, lower processing viscosity and higher strength than epoxy resin blades. Herein, we construct a dense cross-linking structure in polyurethane (PU) based on different amounts of hydroxypropyl methacrylate (HPMA) with low processing viscosity and excellent mechanical properties. By increasing the content of HPMA, the thermal stability of PU is enhanced, but the micro-morphology does not change significantly. When the content of HPMA is 50 g (in 200 g copolymer), the PU sample PH-50 exhibits a viscosity of 70 MPa·s and a gelation time of 120 min at 25 °C, which is sufficient to complete processes like pouring and filling. By post-curing the PH-50 at 80 °C for 2 h, the heat distortion temperature can reach 72 °C, indicating the increase of temperature resistance. The PU copolymers also have excellent mechanical and dynamic thermo-mechanical properties due to the cross-linking structure between PU chains and poly-HPMA chains. Additionally, the PU copolymer has excellent compatibility with various glass fiber fabrics (GFF), showing a good match in the vacuum infusion experiment and great properties in the mechanical test. By compounding PH-50 with GFF, the composite with high strength is easily prepared for a wind turbine blade in various positions. The tensile strengths of the composites are all over 1000 MPa in the 0° direction. Such composites are promising for the future development of wind turbine blades that meet the stringent requirements for outstanding processing and mechanical properties.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Efficient Regulation of the Cross-Linking Structure in Polyurethane: Achieving Outstanding Processing and Mechanical Properties for a Wind Turbine Blade

Jiang,

Li,

et al. 2024

Polymers

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“…[1][2][3][4] In the absence of catalyst catalysis, the EP cannot be cured, so the type and amount of the curing agent largely determine the properties of the EP. Currently commonly used curing agents are polar, such as anhydride, 5 imidazole, 6 thiol, 7 and amine, 8 etc., need to add a large amount of curing agent when curing, and the dielectric properties are not good enough. So, EP is intended to be a low dielectric material for very large-scale integrated circuits and semiconductors, but is limited by relatively high dielectric constant.…”

Section: Introductionmentioning

confidence: 99%

Epoxy/benzoxazinyl POSS nanocomposite resin with low dielectric constant and excellent thermal stability

Feng

Zhang

et al. 2020

J of Applied Polymer Sci

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Benzoxazinyl modified polyhedral oligomeric silsesquioxane (BZPOSS) is successfully synthesized and used to prepare nanocomposites with bisphenol A type epoxy resin (E51). The differential scanning calorimetry results showed the curing peak temperature of E51/BZPOSS blend decrease to 242 C, suggesting the high catalytic activity of BZPOSS to the polymerization of E51. The scanning electron microscope micrographs of poly(E51/BZPOSS)s and silicon element distribution maps given by EDS both demonstrated homogeneous dispersion of BZPOSS. Dielectric properties tests confirmed the dielectric constant can be reduced by the introduction of BZPOSS, which is attributed to the nano-pores from the cage structure of POSS. When 20 wt% BZPOSS was added, the dielectric constant decreased to 2.28 at 1 MHz. Meanwhile, DMA and TGA results indicated the thermal stability and heat resistance of poly(E51/BZPOSS)s at high temperature increased with the increase of BZPOSS, which is due to the increase of the crosslinking density and the change of crosslinking structure of copolymer.

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POSS-Containing Nanocomposites Based on Polyurethane/Poly(Hydroxypropyl Methacrylate) Semi-IPN Matrix

Karabanova

Honcharova²

2023

Springer Proceedings in Physics

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Poss-containing nanocomposites based on polyurethane/poly(hydroxypropyl methacrylate) polymer matrix: dynamic mechanical properties and morphology

Cited by 13 publications

References 18 publications

Efficient Regulation of the Cross-Linking Structure in Polyurethane: Achieving Outstanding Processing and Mechanical Properties for a Wind Turbine Blade

Efficient Regulation of the Cross-Linking Structure in Polyurethane: Achieving Outstanding Processing and Mechanical Properties for a Wind Turbine Blade

Epoxy/benzoxazinyl POSS nanocomposite resin with low dielectric constant and excellent thermal stability

POSS-Containing Nanocomposites Based on Polyurethane/Poly(Hydroxypropyl Methacrylate) Semi-IPN Matrix

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