Ionic elastomer blends of zinc salts of maleated EPDM rubber and carboxylated nitrile rubber

Dutta, Santanu; De, Prabuddha; De, S. K.

doi:10.1002/(sici)1097-4628(19980705)69:1<153::aid-app18>3.0.co;2-0

Cited by 12 publications

(1 citation statement)

References 6 publications

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“…Cross-linking induced by noncovalent interactions in rubber materials is currently attracting a great deal of interest because of the possibility of solving the aforementioned problems [9][10][11][12][13][14]. The noncovalent bonds can be hydrogen, ionic, and coordination, among others.…”

Section: Introductionmentioning

confidence: 99%

Coordination cross-linking gadolinium salt/acrylonitrile-butadiene rubber composite: Its preparation, characterization, and functional properties

Han

Zhang

et al. 2013

Polym. Compos.

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A novel rubber composite of acrylonitrile‐butadiene rubber (NBR) filled with gadolinium salt (GS) particles was prepared for the first time and vulcanized via coordination reactions. The resulting materials exhibit good mechanical properties. Structural analyses indicate that the composite is a kind of elastomers based on coordination cross‐linking interactions between the nitrile groups (–CN) of NBR and gadolinium ions. The mechanical properties of vulcanized GS/NBR rubber are altered when the cross‐link density is changed in the composites. These materials show good irradiation resistance because of the introduction of GS. POLYM. COMPOS., 34:1013–1019, 2013. © 2013 Society of Plastics Engineers

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Section: Introductionmentioning

confidence: 99%

Coordination cross-linking gadolinium salt/acrylonitrile-butadiene rubber composite: Its preparation, characterization, and functional properties

Han

Zhang

et al. 2013

Polym. Compos.

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Residual metal content in Ethylene-Propylene-Diene Monomers synthesized using vanadium- and zirconocene-based catalysts

Haag

Santos

Stedile

et al. 1999

J. Appl. Polym. Sci.

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Ethylene-propylene-diene monomer (EPDM) terpolymers were prepared using either vanadium (VOCl 3 /Al 2 Et 3 Cl 3 ) or zirconocene (Et(Ind) 2 ZrCl 2 /MAO) catalyst systems. Residual metal contents in EPDM films were determined by Rutherford backscattering spectrometry. Metallocene catalyst systems exhibited a higher activity, producing EPDM with lower molecular weight and narrower molecular weight distribution. The highest activity guaranteed lower residual metal content (Zr/C ϭ 10 Ϫ5 ) than in the case of EPDM produced by VOCl 3 /Al 2 Et 3 Cl 3 (V/C ϭ 10 Ϫ4 ). Subsequent steps of dissolution of the polymer and its reprecipitation were seen to reduce the metal contents in both metal systems. Concerning the cocatalyst retention, despite initial use of a very high amount of methylaluminoxane/metallocene (Al/Zr ϭ 3000) in the reactor, only about 4% of this initial concentration remained in the polymer. On the other hand, in the case of vanadium-based catalyst, almost all Al present in the initial conditions (Ӎ8.3) remained in the polymer. In both cases, the residual Al/M ratio was close to the value generally proposed for the generation/stabilization of the active species. In the case of vanadium systems, a test in the synthesis of ethylene propylene rubbers indicated that the absence of diene in the polymer structure leads to a reduction in the residual vanadium content, indicating that the diene double bond might be responsible for partially vanadium coordination.

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Ionic elastomer blends of zinc salts of maleated natural rubber and carboxylated nitrile rubber: Effect of grafted maleic anhydride

Lopattananon

Kraibut

Sangjan

et al. 2007

J of Applied Polymer Sci

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Zinc neutralized maleated natural rubbers (Zn-MNR) were prepared by solution grafting and neutralization with zinc acetate in one-step. It was later used for blending with carboxylated nitrile rubber (XNBR) in the composition of 50/50 parts by weight. The effect of grafted anhydride content (1.2, 1.6, 2.0, and 2.5% wt of NR) on the tensile properties of ionic rubber blends (Zn-MNR/XNBR) was investigated. The tensile strength of the ionic blends was found to be greater than those of pure rubbers. The modulus, tensile, and tear strength of the blends dramatically increased with increasing levels of grafted anhydride. The ionic rubber blends also possessed superior physical properties compared to those of the corresponding nonionic rubber blends (MNR/XNBR). Dynamic mechanical thermal analysis and scanning electron microscopic studies were performed to verify the process of mixing. Fourier transform infrared spectroscopic studies were carried out to characterize the nature of specific intermolecular interactions between Zn-MNR and XNBR chain segments. The results indicated that the ion-ion (Zn þ -COO À ) interactions between Zn-MNR and XNBR are formed at the interface, which provides the mean of compatibilization in the ionic rubber blends.

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Ionic elastomer blends of zinc salts of maleated EPDM rubber and carboxylated nitrile rubber

Cited by 12 publications

References 6 publications

Coordination cross-linking gadolinium salt/acrylonitrile-butadiene rubber composite: Its preparation, characterization, and functional properties

Coordination cross-linking gadolinium salt/acrylonitrile-butadiene rubber composite: Its preparation, characterization, and functional properties

Residual metal content in Ethylene-Propylene-Diene Monomers synthesized using vanadium- and zirconocene-based catalysts

Ionic elastomer blends of zinc salts of maleated natural rubber and carboxylated nitrile rubber: Effect of grafted maleic anhydride

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