Study of the influence of IPPD on thermo‐oxidation process of elastomeric hose

Colom, X.; Andreu‐Mateu, F.; Cañavate, Javier; Mujal, R.; Carrillo, Fernando

doi:10.1002/app.30746

Cited by 31 publications

(19 citation statements)

References 21 publications

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“…For nitrile–butadiene rubber (NBR), the crosslinking reaction happened with increasing rigidity during thermal oxidative aging at 100°C . New unsaturated sites generated at 140°C could have been the nuclei of crosslinking . The mechanical properties and the chemical structural changes of NBR could be well correlated after aging for a long time …”

Section: Introductionmentioning

confidence: 99%

Investigation of crosslinking in the thermooxidative aging of nitrile–butadiene rubber

Zhao

Yang

Iervolino

et al. 2014

J of Applied Polymer Sci

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Chemical crosslinking is possibly the most significant factor affecting the mechanical behavior of rubbers. In this study, we investigated the evolution of network structures (the crosslinking degree and crosslinking density) during the thermooxidative aging of a nitrile-butadiene rubber (NBR) using characterization methods such as low-dimensional NMR, solvent extraction, solvent swelling, IR spectroscopy, and mechanical property measurements. The NMR and solvent extraction results show the change of the crosslinking degree. The solvent swelling results show the change of the crosslinking density. The IR results show the chemical changes relating to crosslinking and chain scissions. Therefore, a comprehensive picture of the thermal oxidative aging of the NBR compound was drawn by the integration of various results from these methods. Crosslinking occurred throughout the aging process, whereas chain scissions took place and competed with crosslinking in the later stage. The crosslinking density increased at a nearly constant rate, whereas the increase in the crosslinking degree slowed down in the later stage. The crosslinking density was closely correlated with the hardness and Young's modulus.

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Section: Introductionmentioning

confidence: 99%

Investigation of crosslinking in the thermooxidative aging of nitrile–butadiene rubber

Zhao

Yang

Iervolino

et al. 2014

J of Applied Polymer Sci

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“…Table 2 includes the most significant absorbance bands assigned to the components present in the samples according to previously published studies [27][28][29].…”

Section: 2-spectroscopy Characterizationmentioning

confidence: 99%

FTIR spectroscopic and thermogravimetric characterization of ground tyre rubber devulcanized by microwave treatment

2016

Self Cite

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In this work the phenomena involved with the microwave devulcanization of ground tyre rubber (GTR) were investigated. During studies three types of GTR characterized by different content of organic compounds (elastomers, plasticizers, etc..), carbon black and ash have been analyzed. The chemical structure of GTR before and after microwave devulcanization process was studied by Fourier transform infrared spectroscopy (FTIR) and thermogravimetric analysis (TGA). Furthermore, efficiency of microwave devulcanization conducted at different time was evaluated based on the crosslinking density and sol content values. FTIR spectroscopy results shown that devulcanization of GTR causes a decrease in carbon black with generation of CO 2 due to its thermo oxidation, a decrease in structural groups of elastomeric components (mainly methylene and methine) and a breaking of C-S groups and S-S bridges. The presented results indicate the strong correlation between content of SiO 2 in GTR and its degree of devulcanization. It was observed that GTR with a high content of SiO 2 are easier devulcanized than samples with low content of SiO 2 , which suggest the presence of silica fillers improve microwave devulcanization efficiency.

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“…As reported in the literature , the thermal, mechanical and dielectric properties of nanocomposites are strongly influenced by the interfacial compatibility between the organic phase and inorganic phase as well as the aggregation of the inorganic fillers. SEM was performed to investigate the morphology properties of the nanocomposites.…”

Section: Resultsmentioning

confidence: 94%

Enhanced properties of phthalonitrile‐terminated polyarylene ether nitriles embedded with hybrid MWCNT–boehmite nanocomposites

Liu

Huang

et al. 2014

Polymer Composites

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The main motivation of the present work was to fabricate novel multifunctional polymer-based nanocomposites. The nanocomposites embedded with multi-walled carbon nanotube-boehmite (MWCNTboehmite) were prepared via hot pressure casting technique. The MWCNT coated with boehmite were synthesized by hydrothermal synthesis. Subsequently, as-prepared MWCNT-boehmite was added into the phthalonitrile-terminated polyarylene ether nitriles (PEN-t-CN) matrix in order to benefit from the synergetic effect of MWCNT and boehmite. Scanning electron microscopy (SEM), transmission electron microscopy (TEM) X-ray diffraction (XRD), and Fourier transform infrared (FTIR) were employed to confirm the existence of MWCNT-boehmite in our article. Furthermore, the structures, fracture morphologies, thermal, mechanical and dielectric properties of the nanocomposites were investigated, respectively. SEM images indicated that the MWCNT-boehmite was homogeneously dispersed in the polymer, which acted as an essential factor to ensure good physical properties. The TGA analysis showed that the incorporation of MWCNT-boehmite enhanced the thermal stability of the nanocomposites with initial degradation temperature (T id ) increasing from 458 to 492 C, while that of the pure PEN-t-CN was 439 C. The mechanical testing proved that significant enhancement of mechanical properties has been achieved. The tensile strength of PEN-t-CN/MWCNT-boehmite composites with 3 wt% MWCNT-boehmite reached the maximum (78.33 MPa), with a 41.7 % increase compared to the pure polymer. More importantly, the unique dielectric properties were systematically discussed and the results demonstrated that dielectric properties exhibited little dependency on frequency. For the incorporation of hybrid filler, the positive impact of MWCNT-boehmite hybrid material resulted in polymer-based nanocomposites with enhanced physical properties. POLYM. COMPOS., 36:2193-2202, 2015.

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Study of the influence of IPPD on thermo‐oxidation process of elastomeric hose

Cited by 31 publications

References 21 publications

Investigation of crosslinking in the thermooxidative aging of nitrile–butadiene rubber

Investigation of crosslinking in the thermooxidative aging of nitrile–butadiene rubber

FTIR spectroscopic and thermogravimetric characterization of ground tyre rubber devulcanized by microwave treatment

Enhanced properties of phthalonitrile‐terminated polyarylene ether nitriles embedded with hybrid MWCNT–boehmite nanocomposites

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