A review of the slow relaxation processes in the glass–rubber transition region of amorphous polymers

Zhang, Rui; He, Xianru; Huang, Guangsu

doi:10.1080/01411594.2015.1007373

Cited by 9 publications

(6 citation statements)

References 92 publications

(97 reference statements)

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“…The spherical Fe 3 O 4 particles helped lamellar‐like graphene to disperse into the rubber matrix because spherical particles could decrease the resistance during dispersing graphene in rubber sheets. However, in the other studies, Fe 3 O 4 particles have been found having no apparent influence on the dynamics of rubber in case of low dispersion; that also explained why Fe 3 O 4 particles had been less reported in modifying rubbers and other polymers. When applied in polar polymer materials, the dispersion of Fe 3 O 4 particles would be worse .…”

Section: Introductionmentioning

confidence: 75%

Reinforcement of the mechanical properties in nitrile rubber by adding graphene oxide/silicon dioxide hybrid nanoparticles

Zhang

Wang

et al. 2017

J of Applied Polymer Sci

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Graphene oxide (GO) and silicon dioxide (SiO 2 ) nanoparticles have been hybridized for improving the mechanical and dynamic mechanical properties of nitrile rubber (NBR). SiO 2 nanoparticles were homogeneously dispersed on the surface and between layers of GO, and the new hybrid nanoparticles formed (GO/SiO 2) had better thermal stability than GO. To evaluate the mechanical properties, GO/SiO 2 /NBR nanocomposites were prepared by solution blending and mechanical solution methods. It was observed that tensile strength increased in a larger grade in GO/SiO 2 /NBR nanocomposites than that in GO/NBR and SiO 2 /NBR nanocomposites, while the elongation at break only changes smoothly. Moreover, dynamics measurements also indicated that the elasticity increased after adding GO/SiO 2 hybrid nanoparticles in NBR. From morphology's analysis of GO/SiO 2 /NBR and GO/NBR nanocomposites, it is was conclude that the hybridization of the GO/SiO 2 was the determining factor for the reinforcement of the mechanical properties and elasticity of the NBR.

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Section: Introductionmentioning

confidence: 75%

Reinforcement of the mechanical properties in nitrile rubber by adding graphene oxide/silicon dioxide hybrid nanoparticles

Zhang

Wang

et al. 2017

J of Applied Polymer Sci

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“…In addition, the area of tan δ peak showed that the area of NBR/GO–PPD was decreased compared to that of NBR ( Figure 9 b). Based on the above result, we could make a conclusion that GO–PPD hybrid particles have a positive interaction with the rubber matrix [ 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 ].…”

Section: Resultsmentioning

confidence: 98%

Improving Thermo-Oxidative Stability of Nitrile Rubber Composites by Functional Graphene Oxide

Zhong

Zhang

Zhao³

et al. 2018

Materials

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Graphene oxide (GO), modified with anti-aging agent p-phenylenediamine (PPD), was added into nitrile rubber (NBR) in order to improve the thermo-oxidative stability of NBR. The modification of GO and the transformation of functional groups were characterized by Fourier transform infrared spectroscopy (FTIR), Raman, and X-ray diffraction (XRD). Mechanical performances of NBR composites before and after the thermo-oxidative aging were recorded. The results of dynamic mechanical analysis (DMA) show an increased storage modulus (G’) and a decreased value of area of tan δ peak after introducing modified GO into NBR. It indicates that filler particles show positive interaction with molecular chains. The thermo-oxidative stability of composites was investigated by thermogravimetric analysis (TG) and differential scanning calorimetry (DSC). Then, the thermo-oxidative aging kinetic parameters were obtained by the Flynn–Wall–Ozawa (FWO) equation. The results of aging tests show that the thermo-oxidative stability of rubber matrix increases obviously after introducing GO–PPD. In addition, mechanical properties (tensile strength and elongation at break) of both before and after aged NBR/GO–PPD composites were superior to that of NBR. This work provides meaningful guidance for achieving multifunction thermo-oxidative aging resistance rubber composites.

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“…The glass transition temperature (Tg) determined from the tan δ peak for all NBR/LDH composites was approximately 2 °C higher than that of the unmodified NBR, as shown in Figure 9 b, which is explained by the restriction of the mobility of NBR chains by LDHs [ 27 , 53 , 54 , 55 , 56 , 57 , 58 ]. Moreover, the Tg of NBR/LDH–SAS (5 phr) was higher than that of NBR/LDH–NO 3 (5 phr), due to the organic ingredient (SAS) in LDH–SAS increasing the interactions between LDH–SAS and the NBR matrix.…”

Section: Resultsmentioning

confidence: 99%

Aging-Resistant Functionalized LDH–SAS/Nitrile-Butadiene Rubber Composites: Preparation and Study of Aging Kinetics/Anti-Aging Mechanism

Shi

et al. 2018

Materials

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With the aim of improving the anti-aging properties of nitrile-butadiene rubber (NBR), a functional organic filler, namely LDH–SAS, prepared by intercalating 4-amino-benzenesulfonic acid monosodium salt (SAS) into layered double hydroxides (LDHs) through anion exchange, was added to nitrile-butadiene rubber (NBR), giving the NBR/LDH–SAS composites. Successful preparation of LDH–SAS was confirmed by XRD, TGA and FTIR. LDH–SAS was well dispersed in the NBR matrix, owing to its strong interaction with the nitrile group of NBR. The obtained NBR/LDH–SAS composites exhibited excellent thermo-oxidative aging resistance as shown by TGA-DSC. Further investigation by ATR-FTIR indicated that SAS can capture the radical groups, even during the aging process, which largely accounts for the improved aging resistance.

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A review of the slow relaxation processes in the glass–rubber transition region of amorphous polymers

Cited by 9 publications

References 92 publications

Reinforcement of the mechanical properties in nitrile rubber by adding graphene oxide/silicon dioxide hybrid nanoparticles

Reinforcement of the mechanical properties in nitrile rubber by adding graphene oxide/silicon dioxide hybrid nanoparticles

Improving Thermo-Oxidative Stability of Nitrile Rubber Composites by Functional Graphene Oxide

Aging-Resistant Functionalized LDH–SAS/Nitrile-Butadiene Rubber Composites: Preparation and Study of Aging Kinetics/Anti-Aging Mechanism

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