Preparation of EPDM Flame-Resistant Cable Materials

2012 ◽  
Vol 151 ◽  
pp. 240-244 ◽  
Author(s):  
Wei Li Wu ◽  
Lei Tian
Keyword(s):  
Flame Retardants ◽  
Oxygen Index ◽  
Raw Materials ◽  
Flame Retardance ◽  
Dicumyl Peroxide ◽  
Curing Agent ◽  
Elongation At Break ◽  
Curing Conditions ◽  
Better Than ◽  
The Ideal

EPDM cable materials were prepared, in which EPDM was used as raw materials, silica as a reinforcement, sulfur and dicumyl peroxide (DCP) as the curing agent, aluminum hydroxide (ATH) and magnesium hydroxide (MH) as the flame retardants. The best content and cure parameters of EPDM cable materials were determined by testing hardness, tensile strength, elongation at break, thermal properties and oxygen index, as well as analyzing SEM. The results showed that the properties of EPDM cable materials with DCP were better than those with sulfur or sulfur / DCP blend. The flame retardance of EPDM cable materials with ATH / MH blend was better than that with ATH or MH. The ideal formula of EPDM flame-resistant cable material was EPDM 100 phr, silica 45 phr, DCP 3.5 phr, ATH 90 phr and MH 10 phr. The best curing conditions were at 170 °C under 1.2 MPa for 10 min.

Influence of phthalocyanine pigments on the properties of flame-retardant elastomeric composites based on styrene-butadiene or acrylonitrile-butadiene rubbers

e-Polymers ◽  
2016 ◽  
Vol 16 (4) ◽  
pp. 287-294
Author(s):  
Szymon Żaczek ◽  
Agnieszka Pająk ◽  
Rafał Anyszka ◽  
Grażyna Janowska
Keyword(s):  
Mechanical Properties ◽  
Flame Retardants ◽  
Oxygen Index ◽  
Cross Linking ◽  
Dicumyl Peroxide ◽  
Green Color ◽  
Atmospheric Air ◽  
Styrene Butadiene ◽  
Elastomeric Composites

AbstractA study about the influence of the impartment of phthalocyanine pigments into elastomeric composites was conducted. Acrylonitrile-butadiene (NBR) and styrene-butadiene (SBR) rubbers crosslinked by either sulfur or dicumyl peroxide were filled with non-toxic flame retardants (Mg(OH)2 or Al(OH)3) and thermally stable pigments (zinc or chloroaluminum phthalocyanines). Determination of cross-linking degree, mechanical properties, aging coefficient, thermal analysis (TG, DTG, DTA) and flammability tests (oxygen index, combustion in air) were carried out. The addition of the pigments, apart from the impartment of blue or blue-green color to elastomeric composites, in numerous cases improved their mechanical properties, thermal stability, limited flammability and allowed obtaining self-extinguishing materials in atmospheric air.

scholarly journals The effect of curing on sorption and diffusion of a brake fluid in EPDM elastomer

e-Polymers ◽  
2005 ◽  
Vol 5 (1) ◽  
Author(s):  
Tahereh Darestani Farahani ◽  
Gholam Reza Bakhshandeh
Keyword(s):  
Tensile Strength ◽  
Oxidative Degradation ◽  
Dicumyl Peroxide ◽  
Curing Agent ◽  
Elongation At Break ◽  
Brake Fluid ◽  
Abrasion Loss ◽  
Technical Properties ◽  
And Diffusion

AbstractThe effect of a poly(ether glycol) brake fluid on cured EPDM (ethylenepropylene- diene monomer) elastomer based on 5-ethylidene-2-norborene has been studied. Different amounts of dicumyl peroxide (DCP) curing agent were used and the effect of ageing in a brake fluid (at 100°C for 70 h) on technical properties of EPDM have been investigated. By increasing the amount of DCP, significant changes were not observed. Tensile strength and modulus increased but elongation at break and abrasion loss decreased due to oxidative degradation and crosslinking. Hardness was constant due to the replacement of plasticizer with brake oil.

Study on Properties of a Novel Flame Retardant Epoxy Curing Agent

2019 ◽  
Vol 953 ◽  
pp. 179-184
Author(s):  
Yong Li Peng ◽  
Can Zhang ◽  
Ni An Zhuo
Keyword(s):  
Flame Retardant ◽  
Epoxy Resin ◽  
Flame Retardancy ◽  
Mass Fraction ◽  
Oxygen Index ◽  
Raw Materials ◽  
Curing Agent ◽  
Resin System ◽  
Limiting Oxygen Index ◽  
Epoxy Curing

Using 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10 oxide (DOPO) and N-methylol acrylamide as the main raw materials, the curing agent DOPO-NMA was synthesized. The flame retardant curing agent DOPO-NMA and E-51 epoxy resin (EP) were then cured to obtain epoxy resin E-51 system, and its flame retardancy, thermal stability and mechanical properties were studied. The results showed that the tensile, bending and impact strength of the cured system decreased with the increase of phosphorus mass fraction in the resin system, and the flame retardancy rating, limiting oxygen index (LOI) and char yield at 700°C increased with the increase of phosphorus mass fraction in the resin system.

Coal Ash as Flame Retardants for Flexible Poly (Vinyl Chloride)

2014 ◽  
Vol 1056 ◽  
pp. 62-65
Author(s):  
Xue Jun Ren ◽  
Chun Guang Song ◽  
Ming Gao
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Flame Retardants ◽  
Oxygen Index ◽  
Coal Ash ◽  
Decomposition Temperature ◽  
Flame Retardance ◽  
Limiting Oxygen Index ◽  
Poly Vinyl Chloride ◽  
Resultant Data

Coal ash as flame retardant was used to PVC, the mechanical properties and flame retardance of the samples were studied. The resultant data show that coal ash better effect on the mechanical properties of the sample, especially tensile strength, impact strength, and 4% of coal ash obtained good flame retardance. PVC treated with flame-retardants showed a high limiting oxygen index, high decomposition temperature, which indicated that the flame retardance of the treated PVC was improved.

Preparation and Performance Investigation of Phenolic Foam

2011 ◽  
Vol 415-417 ◽  
pp. 1508-1511
Author(s):  
Li Yan Wang ◽  
Guang Qing Gai ◽  
Huan Yang Yu ◽  
Wen Long Liu
Keyword(s):  
Oxygen Index ◽  
Raw Materials ◽  
Curing Temperature ◽  
Curing Agent ◽  
Technological Parameters ◽  
Excellent Performance ◽  
Acid Complex ◽  
Foaming Agent ◽  
Phenolic Foam ◽  
And Performance

A phenolic foam(PF) with excellent performance was prepared with the raw materials containing of non-fluorine complex foaming agent,organic and inorganic acid complex curing agent, surfactant twain-80 and self-regulating phenolic resin.The effects of curing temperature,curing agent, foaming agent on curing time,apparent density,compression strength,thermal conductivity and oxygen index of PF were investigated.The optimal technological parameters were obtained.This has important guiding significance for preparation and modification research of PF

Preparation and Wastewater Treatment of Polymeric Aluminum Chloride from Coal Gangue

2012 ◽  
Vol 518-523 ◽  
pp. 780-783
Author(s):  
Rui Gang Wang ◽  
Yun Ling Xin
Keyword(s):  
Aluminum Chloride ◽  
Raw Materials ◽  
Acid Leaching ◽  
Coal Gangue ◽  
Molar Ratio ◽  
Reaction Conditions ◽  
Roasting Temperature ◽  
Better Than ◽  
Waste Coal ◽  
The Ideal

The preparation of polymeric aluminum chloride(PAC) uses industrial waste coal gangue as raw materials was studied. The effects of reaction conditions such as roasting temperature, acid molar ratio, concentration of hydrochloric acid and acid leaching time were studied, the ideal reaction conditions for the preparation of PAC was determined. The result of the experiment for treating wastewater shows that the performance of PAC prepared from coal gangue is much better than that of commercial PAC.

Gangue as Flame Retardants for Flexible Poly(Vinyl Chloride)

2014 ◽  
Vol 983 ◽  
pp. 3-6
Author(s):  
Ming Gao ◽  
Chun Guang Song ◽  
Dan Rong ◽  
Yu Wen Ji
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Flame Retardant ◽  
Yield Stress ◽  
Flame Retardants ◽  
Oxygen Index ◽  
Flame Retardance ◽  
Limiting Oxygen Index ◽  
Poly Vinyl Chloride ◽  
Resultant Data

Gangue as flame retardant was used to PVC, the mechanical properties and flame retardance of the samples were studied. The resultant data show that gangue little effect on the mechanical properties of the sample, especially tensile strength, yield stress, and 10% of gangue obtained good flame retardance. PVC treated with flame-retardants showed a high limiting oxygen index, char yield, which indicated that the flame retardance of the treated PVC was improved.

Green Synthesis and Enhanced CO2 Capture Performance of Perfluorinated Cerium-Based Metal-Organic Frameworks with UiO-66 and MIL-140 Topology

2018 ◽  
Author(s):  
Roberto D’Amato ◽  
Anna Donnadio ◽  
Mariolino Carta ◽  
Claudio Sangregorio ◽  
Riccardo Vivani ◽  
...  
Keyword(s):  
Photoelectron Spectroscopy ◽  
Metal Organic Frameworks ◽  
Isosteric Heat ◽  
Experimental Conditions ◽  
Cerium Ammonium Nitrate ◽  
Ideal Adsorbed Solution Theory ◽  
Metal Organic ◽  
Adsorbed Solution ◽  
Better Than ◽  
The Ideal

Reaction of cerium ammonium nitrate and tetrafluoroterephthalic acid in water afforded two new metal-organic frameworks with UiO-66 [F4_UiO-66(Ce)] and MIL-140 [F4_MIL-140A(Ce)] topologies. The two compounds can be obtained in the same experimental conditions, just by varying the amount of acetic acid used as crystallization modulator in the synthesis. Both F4_UiO-66(Ce) and F4_MIL-140A(Ce) feature pores with size < 8 Å, which classifies them as ultramicroporous. Combination of X-ray photoelectron spectroscopy and magnetic susceptibility measurements revealed that both compounds contain a small amount of Ce(III), which is preferentially accumulated near the surface of the crystallites. The CO<sub>2</sub> sorption properties of F4_UiO-66(Ce) and F4_MIL-140A(Ce) were investigated, finding that they perform better than their Zr-based analogues. F4_MIL-140A(Ce) displays an unusual S-shaped isotherm with steep uptake increase at pressure < 0.2 bar at 298 K. This makes F4_MIL-140A(Ce) exceptionally selective for CO<sub>2</sub> over N<sub>2</sub>: the calculated selectivity, according to the ideal adsorbed solution theory for a 0.15:0.85 mixture at 1 bar and 293 K, is higher than 1900, amongst the highest ever reported for metal-organic frameworks. The calculated isosteric heat of CO<sub>2 </sub>adsorption is in the range of 38-40 kJ mol<sup>-1</sup>, indicating a strong physisorptive character.

NDBEPR PROCESS OPTIMIZATION IN SBRs: REDUCTION OF EXTERNAL CARBON-SOURCE AND OXYGEN SUPPLY

1994 ◽  
Vol 30 (4) ◽  
pp. 169-179 ◽  
Author(s):  
Carl Demuynck ◽  
Peter Vanrolleghem ◽  
Carine Mingneau ◽  
Jan Liessens ◽  
Willy Verstraete
Keyword(s):  
Process Optimization ◽  
Phosphorus Removal ◽  
Numerical Optimization ◽  
Cost Savings ◽  
Operating Costs ◽  
Nitrification Rate ◽  
Aeration Time ◽  
Time Scheduling ◽  
Better Than ◽  
The Ideal

In SBR plants for nutrient removal it is often necessary to add supplementary rbCOD during the anoxic phase to obtain complete nitrogen removal. In addition to the aeration, this supply of high-quality BOD is a non-negligible part in the operating costs. Because of the complexity of the bighly interconnected biological processes a heuristic approach for process optimization is hardly possible. Therefore the Nitrification Denitrification Biological Excess Phosphorus Removal (NDBEPR) model of Wentzel et al. and a numerical optimization a1goritbm were used to optimize SBR time scheduling, i.e. minimize both effluent concentrations and operating costs. It was found that a sequence of short aerobic/anoxic phases appears to be better than the usual sequence (one aerobic phase followed by one anoxic phase). This result was validated on a 500 I scale SBR. The optimized process saves up to 50% on extra BOD supply and up to 30% on aeration time. Moreover, it was shown that these cost savings were not at the expense of the phosphorus removal efficiency or the nitrification rate. From an additional numerical optimization it was seen that the ideal SBR time scheduling may depend on the loading. Therefore. a control strategy hased on OUR and ORP measurements is proposed.

Experimental Study on Mechanical Property of Concrete Based on Seawater and Sea Sand

2013 ◽  
Vol 641-642 ◽  
pp. 574-577 ◽  
Author(s):  
Ying Tao Li ◽  
Ling Zhou ◽  
Mao Jiang ◽  
Yu Zhang ◽  
Jun Shao
Keyword(s):  
Mechanical Property ◽  
Experimental Study ◽  
Fly Ash ◽  
Raw Materials ◽  
Growth Trend ◽  
Sea Sand ◽  
Significant Strength ◽  
Dry Conditions ◽  
Early Strength ◽  
Better Than

In this paper, the mechanical property experiments of concrete based on the seawater and sea sand have been carried in different raw materials preparation and different conservation environments. The results show that the early strength and late strength of concrete based on seawater and sea sand are better than concrete based on freshwater and sand. There is no significant strength decreased for concrete based on seawater and sea sand under accelerated alternating wet and dry conditions. For concrete based on seawater and sea sand mixed with admixture, the downward trend of late strength is significantly delayed, the late strength of concrete based on the seawater and sea sand mixed with slag gets the most obvious growth trend, while the late strength of seawater and sea sand concrete mixed with fly ash gets the largest increment.

Sign in / Sign up

Export Citation Format

Share Document