Synthesis and Characterization of Styrene-Butadiene Rubber-Clay Nanocomposites with Enhanced Mechanical and Gas Barrier Properties

2008 ◽  
Vol 81 (5) ◽  
pp. 821-841 ◽  
Author(s):  
P. Meneghetti ◽  
S. Shaikh ◽  
S. Qutubuddin ◽  
S. Nazarenko
Keyword(s):  
Ammonium Chloride ◽  
Volume Fraction ◽  
Barrier Properties ◽  
Superior Performance ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Mechanical Mixing ◽  
Mechanical Reinforcement ◽  
Gas Barrier ◽  
Styrene Butadiene

Abstract Five styrene-butadiene rubber (SBR)/clay nanocomposite or hybrid systems were synthesized via mechanical mixing of SBR using a Brabender mixer and a 2-roll mill in the presence of unmodified sodium montmorillonite (Na-MMT) clay, MMT modified with octadecylamine (C18amine), MMT modified with a zwitterionic surfactant, octadecyldimethyl betaine (C18DMB), and MMT modified with a polymerizable cationic surfactant, vinylbenzyl octadecyldimethyl ammonium chloride (VODAC) or vinylbenzyl dodecyldimethyl ammonium chloride (VDAC). The surfactant chain length and functional groups affected the dispersion of clay nanolayers in the matrix and the overall properties of the nanocomposites. X-ray diffraction (XRD) revealed peaks corresponding to intercalated structures; transmission electron microscopy (TEM) observations agreed well with XRD assessment of the composites. SBR/VODAC-MMT system exhibited the best dispersion among the nanocomposites studied. VODAC-MMT was partially exfoliated in SBR matrix and the average aspect ratio of the nanolayer stacks or aggregates was high (20). Depending on the amount of clay, considerable mechanical reinforcement and gas barrier enhancement were achieved in nanocomposites over pure rubber. Tensile strength in excess of 18MPa was observed in SBR nanocomposites with 30 phr C18 organoclays. The storage modulus at 25C increased by a factor of four by incorporating 10 phr VODAC-MMT in SBR. The most pronounced oxygen barrier enhancement was again observed in SBR/VODAC-MMT nanocomposite with the reduction of permeability by 60% at silicate volume fraction of 0.06. The superior performance of nanocomposites containing VODAC-MMT is attributed to the presence of the vinyl-benzyl group and 18 carbon-atom tail in the surfactant leading to high compatibility with SBR and nano-scale dispersion in the SBR matrix.

scholarly journals Effect of the Topology of Carbon-Based Nanofillers on the Filler Networks and Gas Barrier Properties of Rubber Composites

Materials ◽  
2020 ◽  
Vol 13 (23) ◽  
pp. 5416
Author(s):  
Shipeng Wen ◽  
Rui Zhang ◽  
Zongchao Xu ◽  
Long Zheng ◽  
Li Liu
Keyword(s):  
Barrier Properties ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Rubber Composites ◽  
Gas Barrier ◽  
Factors Affecting ◽  
Fibrous Carbon ◽  
Styrene Butadiene ◽  
Gas Barrier Properties ◽  
Carbon Based

The topology of nanofillers is one of the key factors affecting the gas barrier properties of rubber composites. In this research, three types of carbon-based nanofillers, including spherical carbon black (CB), fibrous carbon nanotubes (CNTs), and layered graphene (GE) were chosen to investigate the effect of the topological structures of nanofillers on the gas barrier properties of styrene-butadiene rubber (SBR) composites. Results showed that the structure and strength of the filler networks in SBR composites were closely associated with the topology of nanofillers. When filled with 35 phr CB, 8 phr CNTs, and 4 phr GE, the SBR composites had the same strength of the filler network, while the improvement in gas barrier properties were 39.2%, 12.7%, and 41.2%, respectively, compared with pure SBR composites. Among the three nanofillers, GE exhibited the most excellent enhancement with the smallest filler content, demonstrating the superiority of two-dimensional GE in improving the barrier properties of rubber composites.

Gas barrier properties and mechanism of kaolin/styrene–butadiene rubber nanocomposites

2015 ◽  
Vol 111 ◽  
pp. 37-43 ◽  
Author(s):  
Yinmin Zhang ◽  
Qinfu Liu ◽  
Shilong Zhang ◽  
Yude Zhang ◽  
Hongfei Cheng
Keyword(s):  
Barrier Properties ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Gas Barrier ◽  
Rubber Nanocomposites ◽  
Styrene Butadiene ◽  
Gas Barrier Properties

scholarly journals Itaconate Based Elastomer as a Green Alternative to Styrene–Butadiene Rubber for Engineering Applications: Performance Comparison

Processes ◽  
2020 ◽  
Vol 8 (12) ◽  
pp. 1527
Author(s):  
Liwei Li ◽  
Haijun Ji ◽  
Hui Yang ◽  
Liqun Zhang ◽  
Xinxin Zhou ◽  
...  
Keyword(s):  
Carbon Black ◽  
High Performance ◽  
Weight Ratio ◽  
Rolling Resistance ◽  
Performance Comparison ◽  
Superior Performance ◽  
Feed Ratio ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Styrene Butadiene

In response to increasingly stringent requirements for the sustainability and environmental friendliness of the rubber industry, the application and development of bio-based elastomers have received extensive attention. In this work, we prepared a new type of bio-based elastomer poly(dibutyl itaconate-butadiene) copolymer (PDBIB) nanocomposite using carbon black and non-petroleum-based silica with a coupling agent. Using dynamic thermodynamic analysis (DMTA) and scanning electron microscope (SEM), we studied the effects of feed ratio on dynamic mechanical properties, micro morphology, and filler dispersion of PDBIB composites. Among them, silica-reinforced PDBIB60 (weight ratio of dibutyl itaconate to butadiene 40/60) and carbon black-reinforced PDBIB70 (weight ratio of dibutyl itaconate to butadiene 30/70) both showed excellent performance, such as tensile strength higher than 18 MPa and an elongation break higher than 400%. Compared with the widely used ESBR, the results showed that PDBIB had better rolling resistance and heat generation than ESBR. In addition, considering the development of green tires, we compared it with the solution polymerized styrene–butadiene rubber with better comprehensive performance, and analyzed the advantages of PDBIB and the areas to be improved. In summary, PDBIB prepared from bio-based monomers had superior performance and is of great significance for achieving sustainable development, providing a direction for the development of high-performance green tire and holding great potential to replace petroleum-derived elastomers.

The Effect of Bis(3-Triethoxysilylpropyl) Tetrasulfide on Silica Reinforcement of Styrene-Butadiene Rubber

1998 ◽  
Vol 71 (2) ◽  
pp. 289-299 ◽  
Author(s):  
A. S. Hashim ◽  
B. Azahari ◽  
Y. Ikeda ◽  
S. Kohjiya
Keyword(s):  
Fine Particles ◽  
Sol Gel ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Mechanical Mixing ◽  
Transmission Electron ◽  
Curing Characteristics ◽  
Sol Gel Process ◽  
Styrene Butadiene

Abstract Bis(3-triethoxysilylpropyl)tetrasulfide (TESPT) was found to affect the curing characteristics and the physical properties of styrene-butadiene (SBR) gum rubber and xin situ silica-filled SBR vulcanizates. Silica incorporated by the in situ sol-gel reaction of tetraethoxysilane with TESPT showed a much higher reinforcing efficiency than did conventional mechanical mixing and the in situ method without TESPT. The higher reinforcing efficiency is attributed to the formation of a silica-rubber network, which also changed the dynamic mechanical behavior of the SBR vulcanizates. Transmission electron microscopy observations showed in situ silica incorporation of very fine particles in comparison to the sol-gel process without TESPT.

Incorporation and optimization of RGO and GO in SSBR/NR composites expands their applicability

2021 ◽  
pp. 096739112110017
Author(s):  
Guangyi Lin ◽  
Hong Wang ◽  
Boquan Yu ◽  
Shouyi Liu ◽  
Zhenning Liang ◽  
...  
Keyword(s):  
Natural Rubber ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Practical Application ◽  
Mechanical Mixing ◽  
Maximum Torque ◽  
Simple Method ◽  
Wearable Electronic ◽  
Wearable Electronic Devices ◽  
Styrene Butadiene

Natural rubber (NR) has poor mechanical properties, which limits its practical application. Filler blending is a simple method that improves the inherent properties of natural rubber and expand its applicability. Using the mechanical mixing process, the effects of graphene oxide (GO) and redox graphene (rGO) on the physical properties, electrical conductivity, thermal conductivity, and air permeability of styrene-butadiene rubber (SSBR)/NR composites were studied. The results show that rGO exhibits efficient filler properties in various aspects, for example, the optimal filling amount of rGO and GO was 1.5 phr. In addition, rGO filled SSBR/NR composites showed satisfactory filler dispersibility. Notably, the better dispersibility of rGO was because of fewer hydrophilic functional groups on the surface which were difficult to agglomerate. The increase of rGO and GO content increased the maximum torque (MH) and minimum torque (ML) of the composite material, and decreases tc90 and tc10. The Payne effect of GO/SSBR/NR composites is more obvious than that of rGO/SSBR/NR composites. In addition, we found that the content of rGO (GO) reached saturation at 2phr. Notably, rGO and GO improved the properties of rGO filled SSBR/NR composites such as the tensile strength of rGO/SSBR/NR composites to 23.9 MPa. This shows the potential application of SSBR/NR composites in wearable electronic devices.

Crystallization of cis- and trans-1,4-Polyisoprene Dispersed in SBR

1998 ◽  
Vol 71 (5) ◽  
pp. 837-845 ◽  
Author(s):  
A. N. Gent ◽  
S. Kawahara
Keyword(s):  
Natural Rubber ◽  
Continuous Phase ◽  
Degree Of Crystallinity ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Mechanical Mixing ◽  
Avrami Index ◽  
Cis And Trans ◽  
Styrene Butadiene ◽  
Final Degree

Abstract Crystallization of natural rubber (NR) and trans-1,4-polyisoprene (TPI) in blends with styrene—butadiene rubber (SBR) has been studied dilatometrically. For TPI, the melting temperature and Avrami index of crystallization kinetics were unchanged by blending with SBR. However, the rate of crystallization was decreased significantly when only 1 wt % of SBR was added, and much more so for amounts large enough to constitute the continuous phase. These reductions in rate are attributed to two effects: chemical changes in TPI during mechanical mixing, and restricted nucleation in small TPI particles. Similar effects were noted for NR blended with SBR. When solution-blended as a 30/70 mixture with SBR, crystallization of the NR fraction was about 9 times slower than for NR itself, and the rate was reduced still further when mixing was more thorough. However, when NR and SBR were mixed mechanically, the rate of crystallization of the NR fraction was not reduced much although the Avrami index and final degree of crystallinity were significantly lower. These effects suggest that the NR particles are strained during mechanical mixing and do not recover afterwards.

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