Limiting oxygen indices of silicone block polymer

Kambour, R. P.; Klopfer, H. J.; Smith, Steven A.

doi:10.1002/app.1981.070260310

Cited by 50 publications

(30 citation statements)

References 5 publications

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“…This is caused by the phenomenon that the decomposition of HPS at inferior temperature leads to the formation of the silicone-containing group, which will participate in the crosslinked carbonization. It can convert the usual organic decomposition to partially inorganic decomposition by forming the carbonsilicon residue to act as thermal insulation [8,21,22] and to prevent gas evolution, and achieve ultimate improvement on flame retardation of this silicone-containing epoxy system. Meanwhile, with the increasing of the content of Si603 resin, T max of HPS/EP/Si603n/DDM resins is almost the same.…”

Section: Thermal Analysismentioning

confidence: 99%

“…There is no doubt that the polysiloxane modified epoxy resin is a very effective way to impart good thermal stability and flame resistance in polymer modification. For these polysiloxane modified epoxies [8], the conversion to the stable silicon dioxide in air can form a glassy layer on polymer surfaces to cut off the heat and oxygen transfer and improve the flame retardation of the polymers. But this system contains large amounts of oxygen, leading to phase separation and substantial lower glass transition temperatures [9].…”

Section: Introductionmentioning

confidence: 99%

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The investigation of methyl phenyl silicone resin/epoxy resin using epoxy-polysiloxane as compatibilizer

Liu

Xiao

Deng

et al. 2014

J Therm Anal Calorim

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A novel polysiloxane (HPS) with epoxy and phenyl groups was synthesized by controlled hydrolysis and condensation of c-(2,3-epoxypropoxy)propytrimethoxysilane (KH560) and diphenyl silanediol. Besides, HPS was used as the compatibilizer of the miscible diglycidyl ether of bisphenol A (DGEBA)/methyl phenyl silicone resin (Si603) blend. The structure and effect of HPS were characterized by Fourier transform infrared spectra, nuclear magnetic resonance ( 1 H-NMR), differential scanning calorimetry, and scanning electron microscopy (SEM). The results showed that HPS could significantly improve the compatibility between epoxy resin (EP) and Si603 resin. In addition, the glass transition temperature (T g ) of the blend increases with increasing amount of Si603 from 129 to 151°C. The thermal stability of blending system was studied by thermogravimetric analysis, derivative thermogravimetric analysis and SEM. The results showed that the incorporation of Si603 into DGEBA resin not only obviously increased the thermal resistance, but also remarkably improved the flame retardancy. The high limiting oxygen index of the HPS/EP/Si603/DDM system at 31 is considered as excellent flame retardancy in the epoxy system.

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Section: Thermal Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The investigation of methyl phenyl silicone resin/epoxy resin using epoxy-polysiloxane as compatibilizer

Liu

Xiao

Deng

et al. 2014

J Therm Anal Calorim

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“…Phosphorus containing compounds decompose at lower temperature than basic polymers because of the weak bonds of phosphate. They form a surface layer of protective char during burning before the unburned materials begin to decompose 9–11…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of UV‐curable phosphorus containing hybrid materials prepared by sol–gel technique

Karataş

Kayaman‐Apohan

Türünç

et al. 2011

Polymers for Advanced Techs

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In this study, a series of ultraviolet (UV)‐curable organic–inorganic hybrid coating materials containing phosphorus were prepared by sol–gel approach from acrylate end‐capped urethane resin, acrylated phenyl phosphine oxide oligomer (APPO), and inorganic precursors. TEOS and MAPTMS were used to obtain the silica network and Ti:acac complex was employed for the formation of the titania network in the hybrid coating systems. Coating performance of the hybrid coating materials applied on aluminum substrates was determined by the analysis techniques, such as hardness, gloss, impact strength, cross‐cut adhesion, taber abrasion resistance, which were accepted by international organization. Also, stress–strain test of the hybrids was carried out on the free films. These measurements showed that all the properties of the hybrids were enhanced effectively by gradual increase in sol–gel precursors and APPO oligomer content. The thermal behavior of the hybrid coatings was investigated by thermogravimetric analysis (TGA) analysis. The flame retardancy of the hybrid materials was examined by the limiting oxygen index (LOI); the LOI values of pure organic coating (BF) increased from 31 to 44 for the hybrid materials containing phosphorus (BF‐P:40/Si:10). The data from thermal analysis and LOI showed that the hybrid coating materials containing phosphorus have higher thermal stability and flame resistance properties than the organic polymer. Besides that, it was found that the double bond conversion values for the hybrid mixtures were adequate in order to form an organic matrix. The polycondensation reactions of TEOS and MAPTMS compounds were also investigated by 29Si‐NMR spectroscopy. SEM studies of the hybrid coatings showed that silica/titania particles were homogenously dispersed through the organic matrix. In addition, it was determined that the hybrid material containing phosphorus and silica showed fibrillar structure. Copyright © 2009 John Wiley & Sons, Ltd.

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“…It is used widely in manmade leather, fibers, and adhesives. [1][2][3][4][5][6][7][8] Colored PU leather is mostly made of nonwoven fabrics coated with a mixture of a pigment and a PU resin. The color is dull, and there is a lack of brightness and poor rubbing resistance.…”

Section: Introductionmentioning

confidence: 99%

Alkali reduction and reactive dye dyeing of T/N nonwoven fabrics dipped into silicon‐containing, water‐borne polyurethane

Wang

Tzai

Chang

2005

J of Applied Polymer Sci

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Two series of anionic water-borne polyurethanes with alkali resistance and covalent bonds of a reactive dye were synthesized with different molar ratios of poly(tetramethylene glycol) (PTMG). They were classified with respect to PTMG 1000 and PTMG 2000. The fiber blends of polyester/nylon nonwoven fabrics were dipped into siliconcontaining, water-borne polyurethane and squeezed to an 80% pickup ratio. Finally, the manmade leather was treated with alkali reduction and dyed with a reactive dye. The alkali reduction and the thermal, mechanical, and dyeing properties of the manmade leather were studied. For alkali reduction, different ratios of NaOH and Na 2 CO 3 concentrations were used. Na 2 CO 3 was used because of its better spreading and buffering properties. The softness and breaking load were measured and related to the weight reduction. For the dyeing properties, a reactive dye with vinyl sulfone groups was found to bond with the OH group of waterborne polyurethane by covalent bonding. On the basis of alkali reduction, a mixture of NaOH and Na 2 CO 3 with a concentration ratio of 0.1N/0.2N could lead to better softness and alkali reduction of leather. For the mechanical properties, leather of the PTMG 1000 series showed a higher breaking load than leather of the PTMG 2000 series. However, less elongation in the PTMG 1000 series resulted. Differential scanning calorimetry showed an endothermic peak at 50 -100°C. This indicated that the glass-transition temperature of the hard segment decreased with an increasing amount of the soft segment in leather; meanwhile, both the glass-transition temperature of the soft segment and the melting temperature of the hard segment also decreased as the content of the soft segment increased. For the dyeing properties, the reactive blue dye could reach up to 96.1% dye uptake in the polyurethane part of the leather. Moreover, the washing fastness could be graded as high as 4 -5, and the light resistance was also graded to 4 -5, in the dyed leather.

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Limiting oxygen indices of silicone block polymer

Cited by 50 publications

References 5 publications

The investigation of methyl phenyl silicone resin/epoxy resin using epoxy-polysiloxane as compatibilizer

The investigation of methyl phenyl silicone resin/epoxy resin using epoxy-polysiloxane as compatibilizer

Synthesis and characterization of UV‐curable phosphorus containing hybrid materials prepared by sol–gel technique

Alkali reduction and reactive dye dyeing of T/N nonwoven fabrics dipped into silicon‐containing, water‐borne polyurethane

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