influence of silica content on nr cr blends free

influence of silica content on nr cr blends free

  • Controlled growth of in situ silica in a NR/CR blend by a ...

    Silica is grown in situ into a natural rubber (NR)/chloroprene rubber (CR) blend (at 40/60 ratio), by a solution sol–gel method, where the silica content in rubber blend is increased in a controlled manner exceeding the limit found for the same blend ratio in the soaking sol–gel method. Reaction conditions have been optimized to get adequate conversion of tetraethoxysilane (TEOS, a silica precursor) to

  • Effects of Silica, Calcium Carbonate, and SiO2/CaCO3 ...

    Request PDF Effects of Silica, Calcium Carbonate, and SiO2/CaCO3 Blends on Properties of Cellular NR Compounds The objective of this work was to study the effect of silica (SiO2) and calcium ...

  • Preparation and Characterization of Rubber Blends for ...

    AbstractIntroductionExperimentalCharacterizationResults and DiscussionsConclusionsData AvailabilityAcknowledgmentsThe physico-mechanical properties of variable rubber blends including epoxide natural rubber (ENR), polybutadiene rubber (BR), and solution polymerized styrene-butadiene rubber (SBR) filled with silanized silica and carbon black mixtures were explored. The tensile, hardness, resilience, abrasion, and fatigue behavior were investigated. An optimized composition involving 30 phr of ENR and 70 phr SBR filled with mixtures of carbon blacks and silanized silica was proposed to be a suitable composition for the future
  • Influence of Cure Condition on Crosslink Types and ...

    Effects of alkanolamide (ALK) addition on cure characteristics, swelling behaviour and tensile properties of silica-filled natural rubber (NR)/chloroprene rubber (CR) blends were investigated. The ...

  • Influence of Silanized-Silica and Carbon Black on the Cure ...

    The incorporation of both fillers caused higher tensile strength than that unfilled rubber blends. By comparison, the silanized-silica filled NR/rCR blends showed higher tensile strength than CB filled NR/rCR blends. Morphological characterization as observed from SEM justified these results.

  • The influence of CB, silica and CaCO3 on tensile and ...

    The blends were melt-mixed using a Brabender Plasticorder torque rheometer at 190°C and 50 rpm. A fixed 70:30 blend ratio (wt%) of PP and rubber was prepared. The effect of partial replacement of ...

  • (PDF) Compounding and Processing of Rubber/Rubber Blends

    NR/CR blends where NR is the continuous phase up to a 25/75 blend . ratio) . 6. An increase in mix time and temperature will decrease the domain size. 7. IR/SBR and IR/PBD blends are heterogeneous ...

  • Blends of brominated EPDM and NR. - Free Online Library

    1996-01-01  The adhesive strength of the NR/BEPDM blend to NR substrate was studied, and the NR/BEPDM blend was investigated as a passenger car tire side wall to demonstrate an example of the applications of this blend. Materials The rubbers used in this study are natural rubber (SMR-L) and a high ENB content EPDM. Bromination of the EPDM was carried out ...

  • Influence of silica nanoparticles incorporated with ...

    2019-04-01  The plots further show a decrease in impedance with the increase in silica content. Download : Download high-res image (97KB) Download : Download full-size image; Fig. 7. The complex variation plots (Z′ and Z″) for the chitosan/polyacrylamide (Cs/PAM) blend and CS/PAM doped with 0.15, 0.3, 0.6 and 0.9 wt.% of silica nanoparticles (SiO 2).

  • Silica Determination Mining SGS

    The free silica content is calculated by comparing the major quartz peak intensities of the sample with that of a standard lithium fluoride (LiF) mixture. Respirable Silica (Free Quartz) On Air Filter Cartridges In the workplace, respirable silica is loaded onto a 25 mm, 0.5µm pore size silver membrane filter.

  • Influence of silane coupling agent on bound rubber ...

    Influence of silane coupling agent [bis-(3-(triethoxysilyl)-propyl)-tetrasulfide, TESPT] on bound rubber formation of carbon black-filled NR/SBR blend compounds was investigated. Bound rubber formation of carbon black-filled NR compounds with and without TESPT was also examined. Bound rubber contents of the NR/SBR blend compounds were less than those of the single NR compounds.

  • Influence of Coupling Agent on Properties of Carbon Black ...

    useful NR blends [20]. In the present work, influence of the silane coupling agent on the properties of carbon black-reinforced rubber compounds and vulcanizates was studied. Bound rubber contents of the rubber compounds were measured to investigate level of reinforcement, the apparent crosslink densities were also measured, and the physical properties were compared. Experimental Ten carbon ...

  • Influence of silica nanoparticles incorporated with ...

    2019-04-01  The plots further show a decrease in impedance with the increase in silica content. Download : Download high-res image (97KB) Download : Download full-size image; Fig. 7. The complex variation plots (Z′ and Z″) for the chitosan/polyacrylamide (Cs/PAM) blend and CS/PAM doped with 0.15, 0.3, 0.6 and 0.9 wt.% of silica nanoparticles (SiO 2).

  • Utilization of waste expanded polystyrene: Blends with ...

    2012-09-01  The processing characteristics of silica filled NR and silica filled NR/EPS blends are given in Table 2. The cure time and scorch time are higher for blends than for NR and increase with increasing MA content. The grafted compounds display significantly longer scorch and cure times compared to NR

  • Reinforcement of Natural Rubber with Core-Shell Structure ...

    A highly performing natural rubber/silica (NR/SiO2) nanocomposite with a SiO2 loading of 2 wt% was prepared by combining similar dissolve mutually theory with latex compounding techniques. Before polymerization, double bonds were introduced onto the surface of the SiO2 particles with the silane-coupling agent. The core-shell structure silica-poly(methyl ...

  • Role of dichlorocarbene modified styrene butadiene rubber ...

    2001-04-01  Elastomeric blends can either be miscible or immiscible depending on the free energy of mixing, ... Rheographs at 150°C of silica filled 50/50 SBR/CR blend and compatibilised blend. There is enhancement in technical properties with the addition of filler as shown in Table 10, Table 11. The blend containing fillers of carbon black and silica shows a higher tensile strength, tear strength and ...

  • [PDF] A Comparative Study of The Cure Characteristics ...

    Comparison between incompatible and compatible blend of nitrile rubber (NBR) and styrene butadiene rubber (SBR) with acrylonitrile butadiene styrene (ABS) is studied. Physical rheological characteristics and abrasion resistance for the investigated samples are performed. The use of acrylonitrile butadiene styrene (ABS) as compatibilizer improves the abrasion resistance of the blends.

  • Influence of Nanoparticles on Miscibility of Polymer ...

    2005-02-18  We propose a simple theory describing the influence of nanoparticles on thermodynamics of binary polymer mixture. In particular, we consider the case in which nanoparticles preferentially segregate into one of the polymeric components. Depending on the particle radius Rp and the polymer degree of polymerization N, addition of nanoparticles can either promote or hinder mixing of the

  • Thermal stability of CR/CSM rubber blends filled with nano ...

    The nano-silica filled CR/CSM rubber blend has higher V r0 / V rf values than micro-silica composites and show better polymer–filler interaction according to Kraus equation. The nano-silica filled CR/CSM rubber blends were transparent at all filler concentration, and have higher Limestone transition values than micro-silica filled compounds.

  • Evaluation of Effect of Various Nanofillers on ...

    The solubility parameter value of CR is an intermediate of that of NR and NBR. Also the presence of dipole within the repeat unit allows the possibility of interaction of acrylonitrile repeat unit of NBR. Fillers like carbon black, metals, and ceramics were used to improve the technological properties of NBR [15–19]. For example, carbon blacks are excellent fillers because of their strong ...

  • Reinforcement of natural rubber hybrid composites based on ...

    2014-03-01  A research has been carried out to develop natural rubber (NR) hybrid composites reinforced with marble sludge (MS)/Silica and MS/rice husk derived silica (RHS). The primary aim of this development is to scrutinize the cure characteristics, mechanical and swelling properties of such hybrid composite. The use of both industrial and agricultural waste such as marble sludge and rice husk

  • Thermal stability of CR/CSM rubber blends filled with nano ...

    The nano-silica filled CR/CSM rubber blend has higher V r0 / V rf values than micro-silica composites and show better polymer–filler interaction according to Kraus equation. The nano-silica filled CR/CSM rubber blends were transparent at all filler concentration, and have higher Limestone transition values than micro-silica filled compounds.

  • [PDF] A Comparative Study of The Cure Characteristics ...

    Comparison between incompatible and compatible blend of nitrile rubber (NBR) and styrene butadiene rubber (SBR) with acrylonitrile butadiene styrene (ABS) is studied. Physical rheological characteristics and abrasion resistance for the investigated samples are performed. The use of acrylonitrile butadiene styrene (ABS) as compatibilizer improves the abrasion resistance of the blends.

  • Devulcanization of Waste Rubber and Generation of Active ...

    The silica natural rubber composites are prepared by replacing 30% fresh NR by devulcanized NR with varying contents of silica. The composites exhibit excellent mechanical properties, tear strength, abrasion resistance, and dynamic mechanical properties as compared with

  • Volume 73 Issue 1 Rubber Chemistry and ... - Allen Press

    2000-03-01  High Strain Hysteresis Loss of Rubber Vulcanizates under Pure Shear and Constrained Extension and Influence of Filler. Kamal K. Kar; Anil K. Bhowmick. Abstract . View Article. PDF. Studies of Peroxide Curing of Polybutadiene/Zinc Diacrylate Blends by Fast FT-IR Imaging. Sung Joon Oh; Jack L. Koenig. Abstract . View Article. PDF. Production of Soluble Protein Free Latex by Radiation

  • [PDF] Cure Characteristics, Mechanical and Swelling ...

    In the present study, attempts have been made to modify Marble Sludge (MS) filled Ethylene-propylene-diene monomer (EPDM) with Chloroprene rubber (CR). Compounding was carried out on a two-roll mill and vulcanized at 155℃. The modified blend of MS filed EPDM/CR was characterized on the basis of the effect of blend ratio on cure characteristics, mechanical and swelling properties of blends ...

  • Novel thermoplastic natural rubber based on thermoplastic ...

    2012-08-11  Three different forms of natural rubber: maleated natural rubber (MNR), epoxidized natural rubber (ENR) and natural rubber-graft-poly(methyl methacrylate) (NR-g-PMMA) were prepared. Degree of functional groups in rubber molecules was quantified using the integrated peak areas of 1H NMR. It was found that the modified rubbers with similar level of functionality had been successfully

  • Evaluation of Effect of Various Nanofillers on ...

    The solubility parameter value of CR is an intermediate of that of NR and NBR. Also the presence of dipole within the repeat unit allows the possibility of interaction of acrylonitrile repeat unit of NBR. Fillers like carbon black, metals, and ceramics were used to improve the technological properties of NBR [15–19]. For example, carbon blacks are excellent fillers because of their strong ...

  • Volume 89 Issue 4 Rubber Chemistry and ... - Allen Press

    2016-12-01  INFLUENCE OF PHASE MORPHOLOGY AND FILLER DISTRIBUTION IN NR/BR AND NR/SBR BLENDS ON FRACTURE MECHANICAL PROPERTIES . Matthias Wunde; Manfred Klüppel. Abstract . View Article. PDF. TOWARD REPLACEMENT OF PETROLEUM OILS BY MODIFIED SOYBEAN OILS IN ELASTOMERS. Jiaxi Li; Avraam I. Isayev; Xiaofeng Ren; Mark D. Soucek.

  • Ketahanan n-pentana dan sifat mekanis vulkanisat karet ...

    Rubber seal compound was made of NR and NBR blend (BN) with CR (BCR), and ENR with epoxy content of 10% (BENR10), 20% (BENR20), 30% (BENR30), 40% (BENR40), and 50% (BENR50). The composition in each formula was homogenized, with comparison of NR:NBR at 40:60, and NR:compatibilizer:NBR at 40:5:55. That compounds were vulcanized with efficient system at 150oC. The addition of CR

  • Ketahanan n-pentana dan sifat mekanis vulkanisat karet ...

    Rubber seal compound was made of NR and NBR blend (BN) with CR (BCR), and ENR with epoxy content of 10% (BENR10), 20% (BENR20), 30% (BENR30), 40% (BENR40), and 50% (BENR50). The composition in each formula was homogenized, with comparison of NR:NBR at 40:60, and NR:compatibilizer:NBR at 40:5:55. That compounds were vulcanized with efficient system at 150oC. The addition of CR

  • Ternary NR/BR/SBR rubber blend nanocomposites - Slaviša ...

    The goal of this work was to synthesize and characterize ternary rubber blends based on polyisoprene (natural rubber (NR)), polybutadiene rubber (BR), and styrene–butadiene rubber (SBR) (NR/BR/SBR = 25/25/50) reinforced with different loading silica (SiO 2) nanoparticles (0–100 part per hundred parts of rubber (phr)).The specimens were subjected to thermooxidative aging at 100°C, for two ...

  • Novel thermoplastic natural rubber based on thermoplastic ...

    2012-08-11  Three different forms of natural rubber: maleated natural rubber (MNR), epoxidized natural rubber (ENR) and natural rubber-graft-poly(methyl methacrylate) (NR-g-PMMA) were prepared. Degree of functional groups in rubber molecules was quantified using the integrated peak areas of 1H NMR. It was found that the modified rubbers with similar level of functionality had been successfully

  • Volume 89 Issue 4 Rubber Chemistry and ... - Allen Press

    2016-12-01  INFLUENCE OF PHASE MORPHOLOGY AND FILLER DISTRIBUTION IN NR/BR AND NR/SBR BLENDS ON FRACTURE MECHANICAL PROPERTIES . Matthias Wunde; Manfred Klüppel. Abstract . View Article. PDF. TOWARD REPLACEMENT OF PETROLEUM OILS BY MODIFIED SOYBEAN OILS IN ELASTOMERS. Jiaxi Li; Avraam I. Isayev; Xiaofeng Ren; Mark D. Soucek.

  • Silica based inorganic–organic hybrid materials for the ...

    Silica based porous materials are considered as promising adsorbents for water remediation due to their high surface area, well defined tunable pore size and high adsorption capacity. 21,22 Owing to their economic feasibility, high thermal and mechanical stabilities, they can be utilized as inorganic solid matrixes in the inorganic–organic hybrid materials. 23,24 Several researchers have ...

  • Processing rheological behavior of functionalized silica ...

    2019-05-08  The results showed that the three types of coupling agents could control the surface properties of silica, diminish the silica network, reduce the storage modulus and loss modulus, weaken the Payne effect, and improve processability. A comprehensive modification effect was observed for the coupling agent NXT.

  • Influence of styrene on grafting efficiency of maleic ...

    Grafting of maleic anhydride (MA) onto natural rubber (NR) has been investigated by using a radical initiated grafting process. NR was masticated to lower molecular weight than the original NR before treatment with 0.5-1.5% by mole of benzoyl peroxide (BPO) and 5-25% by mole of MA in toluene solution. Fourier transform infrared spectroscopy (FTIR) and titration method were used to analyze the ...

  • How to Improve Rubber Compounds (2nd Edition)

    ACM > CSM > CR > NR ≈ NBR > AU/EU > SBR/BR GEN: R.Mastromatteo, E. Morrisey, M. Mastromatteo, H. Day, “Matching Material Properties to Application Requirements,” Rubber World, February, 1983, p. 28. The so-called “continuous use” temperature rankings for specialty elastomers were reported as follows: Type of rubber Continuous use temperature HNBR 145°C (293°F) ACM 150°C

  • STARTING POINT RUBBER COMPOUNDING FORMULATIONS

    NR (RSS) 70 100 100 60 100 100 Peptizer 0.08 0.1 0.1 0.05 0.1 0.1 BR (High Cis) 30 - - 40 - - ... Ppt. Silica - - - 10 15 TSPT - - - - 1.0 Aromatic Oil - - 5 5 10 Naphthenic Oil - 12 - - - Petroleum Resin - 2.0 2.5 2.0 4.0 MC wax 3.0 - 2.0 1.5 1.5 Pilcure NS 1.0 0.7 1.0 1.2 1.2 Pilcure MBTS 0.1 - - - Accelerator DPG - - - - 0.5 Pilgard PVI - 0.1 - 0.05 0.2 Sulfur 2.0 - 1.8 2.0 - Insol. Sulfur ...

  • CAB-O-SIL Fumed Silica in Unsaturated Polyester Resins

    their blends. Table of contents PAGE NR Introduction 2 Grades of CAB-O-SIL Fumed Silica 3 Thickening and Thixotropy 4 Factors Affecting the Performance of Fumed Silica 6 Loading 6 Dispersion 7 Shear Rate and Dispersion 8 Mixing Time 9 Mixing Equipment 9 Styrene Content 10 Polar Additives 10 Effects of Promoter 11 Resin Chemistry 11 Comparison with Functional Substitutes 14 Practical ...