Novel one‐step synthesis of acrylonitrile butadiene rubber/bentonite nanocomposites with (3‐Mercaptopropyl)trimethoxysilane as a compatilizer

et al. 2015

Macromol. Res.

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Latex compounding method (LCM) was applied to ensure a better dispersion state of filler in rubber matrix. In order to enhance the compatibility and interfacial interaction between carboxylated-styrene butadiene rubber (XSBR) and rice bran carbon (RBC), a series of coupling agents i.e., N-(2-aminoethyl)-3-aminopropyltrimethoxysilane (AAPTS), 3-mercaptopropyltrimethoxysilane (MPTMS), 4,4-methylene bis(phenyl isocyanate) (MDI) and ionic liquid 1-hexyl-3-methylimidazolium hexafluorophosphate (HMIMPF6) were applied. Morphology of the fracture surface, mechanical property, thermal stability, vulcanization characters and dynamic mechanical property were investigated. The characterization on the resultant composites demonstrated that the MDI exhibited the superior reinforcing effect, of which the tensile strength and 300% modulus reached to 16.43 and 16.33 MPa, respectively. The study on fracture surface, Raman spectrum, thermal stability and storage modulus confirmed the strong interfacial interaction resulted from MDI. In addition, ionic liquid also exhibited coupling activity, improving the mechanical properties of the composites.

Section: Resultsmentioning

confidence: 99%

Effect of coupling agents and ionic liquid on the properties of rice bran carbon/carboxylated styrene butadiene rubber composites

et al. 2015

Macromol. Res.

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“…In our work, equilibrium swelling ratio was determined. The specimens were swelled in toluene for 72 h according to ASTM D471‐79 standard . The equilibrium swelling ratio ( S ) of the composites was computed with the following equation:

S = \frac{true(W_{normals} - W_{normalu} true) / ρ_{normals}}{W_{normalu} / ρ_{normalr}} \times 100 normal%

where W s is the weight of swollen specimens, W u is the original weight of the specimens in air, ρ s is the density of toluene (0.867 g/cm 3 ), and ρ r is the density of the specimens.…”

Section: Characterizationmentioning

confidence: 99%

Effects of silane coupling agents on tribological properties of bentonite/nitrile butadiene rubber composites

Deng

et al. 2015

Polymer Composites

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In this work, effects of silane coupling agents on the tribological properties of bentonite/nitrile butadiene rubber (NBR) composites were investigated. The composites were fabricated with a facile method. Three silane coupling agents, (3‐mercaptopropyl)trimethoxysilane (MPTMS), bis[3‐(triethoxysilyl)propyl]tetrasulfide (TESPT) and [3‐(2‐aminoethylamino)propyl]triethoxysilane (AEAPTMS) were employed in our research. The short sulfur bonds formed between MPTMS and macromolecules in the matrices limited the extension of the contact interface between rubber matrices and glass plate, which contributed to the reduction in friction coefficient. With TESPT and AEAPTMS, the adhesion force of the composites was remarkably reinforced, further leading to the increase in friction coefficient. In the wear test, bentonite/silane/NBR composites showed better wear resistance compared to the specimens fabricated without silanes. By investigation on the morphological features of the worn surfaces, different wear mechanisms for composites with/without silane coupling agents were illustrated in detail. Generally, the effects of silanes to adhesion force, hysteresis loss ratio, and hardness all contributed to the friction coefficients of the composites. In wear test, the effects of the silanes on hysteresis force were prominent. Incorporated with MPTMS, the composite showed poor wear resistance due to its high hysteresis loss ratio. POLYM. COMPOS., 38:2347–2357, 2017. © 2015 Society of Plastics Engineers

“…19 Some scholars have done similar research. 22 As the previous literature recorded, calcined or ball milled was employed for kaolin 23 and alcohol aqueous solution was used to treat SCA 24 which led to a complex process. In the research of Mohamed et al, 21 the storage modulus of fluoropolymers with the incorporation of montmorillonite descend.…”

Section: Introductionmentioning

confidence: 99%

Effects of different silane coupling agents on structure and properties of starch–chitosan–kaolin composites

J of Applied Polymer Sci

Xing

et al. 2019

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Effects of different silane coupling agents on clay surface modification were studied. Herein, functionalized superfine kaolin was compounded with starch-chitosan (SCS) to prepare starch-chitosan-functionalized superfine kaolin composite. The characterization results showed that kaolin (K) was successfully modified; the composite formed a dense intercalated structure. The glass-transition temperature (T g ) was measured by differential scanning calorimetry and dynamic mechanical analysis. It decreased by 60 C which attested the crystallinity of SCS. The results of thermogravimetric analysis showed that the fastest weight-loss temperature (T max ) was elevated by over 50 C for composites. Mechanical properties of the composites were explored by electronic universal testing machine. Tensile strength and elongation of composites were improved by 4.7 and 10.9 times.