scholarly journals Mechanism and kinetic regularities of crystallization of nanocomposites based on bentonite and polymer mixtures of random polypropylene with butadiene nitrile rubber

2021 ◽  
pp. 48-50
Author(s):  
N. T. Kakhramanov ◽  
A. J. Guliyev ◽  
Kh. V. Allahverdiyeva ◽  
G. D. Heydarova
Keyword(s):  
Maleic Anhydride ◽  
Crystallization Process ◽  
Thermoplastic Elastomer ◽  
Nitrile Rubber ◽  
Butadiene Rubber ◽  
Polymer Mixtures ◽  
Nitrile Butadiene Rubber ◽  
Butadiene Nitrile Rubber ◽  
Specific Volumes

The paper presents the results of a study of the dilatometric properties of thermoplastic elastomer nanocomposites based on mixtures of random polypropylene, nitrile butadiene rubber, a compatibilizer - copolymer of polypropylene with maleic anhydride. Nanosized bentonite particles were used as a filler. The concentration of bentonite nanoparticles was varied in the range of 1.0-20 wt %. The values of the free and occupied specific volumes of nanocomposites were determined depending on the temperature and concentration of bentonite. The mechanism and kinetic regularities of the crystallization process of nanocomposites are established.

scholarly journals Dynamically vulcanized elastoplastics based on the technologically compatible random polypropylene and butadiene-nitrile rubber

2020 ◽  
Vol 1 (11-12) ◽  
pp. 30-33
Author(s):  
N. T. Kakhramanov ◽  
A. D. Guliev ◽  
V. S. Osipchik
Keyword(s):  
Graft Copolymer ◽  
Methacrylic Acid ◽  
Physicomechanical Properties ◽  
Nitrile Rubber ◽  
Butadiene Rubber ◽  
Nitrile Butadiene Rubber ◽  
Butadiene Nitrile Rubber

The basic physicomechanical properties of dynamically vulcanized elastoplastics based on random polypropylene and nitrile butadiene rubber are considered. It is shown that the higher the concentration of nitrile groups in the nitrile-butadiene rubber, the higher the limiting concentration of the elastomer to appear rubber-like properties in elastoplastics. In order to improve the compatibility of the components of the mixture, a graft copolymer of polypropylene with methacrylic acid was used as a compatibilizer. In contrast to sulfuric vulcanization, peroxide one contributes to a signifi cant deterioration of the melt fl ow index of elastoplastics.

Thermodeformation properties of dynamically volcanized thermoplastic elastomers based on random polypropylene and nitrile butadiene rubber

2021 ◽  
Vol 7 ◽  
pp. 49-55
Author(s):  
N. T. Kakhramanov ◽  
◽  
A. J. Guliyev ◽  
M. I. Abdullin ◽  
Kh. V. Allahverdiyeva ◽  
...  
Keyword(s):  
Maleic Anhydride ◽  
Elastic Characteristic ◽  
Thermoplastic Elastomers ◽  
Thermomechanical Properties ◽  
Polymer Composition ◽  
Dicumyl Peroxide ◽  
Butadiene Rubber ◽  
Polymer Mixtures ◽  
Grafted Copolymer ◽  
Nitrile Butadiene Rubber

The paper presents the results of a study of the thermodefomational characteristics of dynamically vulcanized thermoplastic elastomers based on random polypropylene and nitrile butadiene rubber (SKN). In order to improve the compatibility of polymer mixtures, Exxelor PO1200, a grafted copolymer of polypropylene with maleic anhydride, was used as a compatibilizer. The concentration of maleic anhydride in the composition of the grafted copolymer was 3.0 wt. %. It was shown that as a result of the loading of the compatibilizer, it seemed possible to improve the compatibility of bipolar mixtures, in which there was no separation between the components of the mixture. It was found that with the load of 30 wt. % SKN-18, as well as 40 wt. % SKN-26 or SKN-40 into the composition of random polypropylene, the polymer composition exhibits the properties of thermoplastic elastomers, as a result of which plastic deformation is replaced by a highly elastic characteristic for rubbers. The temperature regions of the solid, highly elastic, and viscous flowing states are determined. In order to give polymer blends greater elasticity, they were vulcanized using crosslinking agents such as dicumyl peroxide and sulfur. It is shown how, in the process of increasing the concentration of dicumyl peroxide from 0.25 to 1.0 wt. %, the thermomechanical properties of dynamically vulcanized thermoplastic elastomers significantly change. It was found that with the introduction of dicumyl peroxide in an amount equal to 1.0 wt. %, the melt flowability of vulcanized materials almost completely lose their ability to flow, and pass from a highly elastic state to a glassy one. With the load of sulfur in an amount of 1.0 to 10 wt. %, the melt flowability of the vulcanized thermoplastic elastomers is preserved.

scholarly journals Unique microstructure of an oil resistant nitrile butadiene rubber/polypropylene dynamically vulcanized thermoplastic elastomer

RSC Advances ◽  
2017 ◽  
Vol 7 (9) ◽  
pp. 5451-5458 ◽  
Author(s):  
Nanying Ning ◽  
Xiangyan Li ◽  
Hongchi Tian ◽  
Yueqing Hua ◽  
Hongli Zuo ◽  
...  
Keyword(s):  
Morphological Evolution ◽  
Thermoplastic Elastomer ◽  
Butadiene Rubber ◽  
Nitrile Butadiene Rubber ◽  
Thermoplastic Vulcanizates

This paper reports on the microstructure, morphological evolution and the properties of oil resistant nitrile butadiene rubber (NBR)/polypropylene (PP) thermoplastic vulcanizates (TPVs) prepared by dynamical vulcanization (DV).

High-impact Composites of Polypropylene and Nitrile Butadiene Rubber with Improved Compatibility of the Polymer Components, Obtained by Melt Reactive Compounding. Part 2: The Influence of the Composition and Concentration of the Polymer Compatibiliser on the Impact Strength of the Composites

2018 ◽  
Vol 45 (4) ◽  
pp. 157-160
Author(s):  
Yu.M. Kazakov ◽  
A.M. Volkov ◽  
I.G. Ryzhikova ◽  
S.I. Vol'fson
Keyword(s):  
Maleic Anhydride ◽  
Impact Strength ◽  
Functional Groups ◽  
Aromatic Amine ◽  
High Impact ◽  
Vinyl Monomers ◽  
Butadiene Rubber ◽  
Nitrile Butadiene Rubber ◽  
Monoethylene Glycol ◽  
The Impact

We have studied the impact strength of composites of structural designation containing polypropylene (PP) and 23 wt% nitrile butadiene rubber BNKS-18AMN, obtained by peroxide modification in the presence of polar vinyl monomers: maleic anhydride, its polyester with monoethylene glycol (MEG), and a complex of MEG with aromatic amine antioxidant Diaphene FP (DFP). The composites also contained compatibilisers based on PP or its blends with 10 wt% BNKS-18AMN, modified with analogous peroxide modifying systems. Measurements of impact strength were conducted at temperatures of + 23°C and −30°C; the concentration range of all tested compatibilisers in the composites was 3–20 wt%. The dependence of the impact strength on the content of compatibilisers at both temperatures has a complex extremal nature. It was established that, of all the tested composites, the highest level of impact strength and a relatively slow fall in its values are ensured by a compatibiliser containing complex coagent MEG + DFP. The obtained results may be explained by the increased volume and more homogeneous structure of the transition interphase layer formed under these compounding conditions owing to the specific and effective nature of interaction of the MEG molecules with functional groups of the nitrile butadiene rubber in the interphase region of these composites, promoted by the presence of the secondary aromatic amine complexly bound with the MEG.

scholarly journals Impact Modified Polyvinyl Chloride Based Thermoplastic Elastomers: Effect of Nitrile Butadiene Rubber and Graphene Oxide Loading

2021 ◽  
Vol 17 (1) ◽  
pp. 51-74
Author(s):  
Kuhanraj Vijayan ◽  
Mathialagan Muniyadi ◽  
Yamuna Munusamy
Keyword(s):  
Graphene Oxide ◽  
Impact Strength ◽  
Polyvinyl Chloride ◽  
Thermoplastic Elastomer ◽  
Thermoplastic Elastomers ◽  
Morphological Observation ◽  
Butadiene Rubber ◽  
Swelling Properties ◽  
Nitrile Butadiene Rubber ◽  
Micro Cracks

A new thermoplastic elastomer with improved impact and tensile properties was produced through melt blending of graphene oxide filled nitrile butadiene rubber (NBR-GO) and polyvinyl chloride (PVC) without the addition of plasticisers and thermal stabilisers. Nitrile butadiene rubber (NBR) compounds, with and without graphene oxide (GO) are prepared through latex compounding method and cured, prior to blending with PVC. The effect of NBR and NBR-GO loading on the process-ability and physico-mechanical properties of PVC blends were evaluated. The addition of NBR and NBR-GO improved tensile strength (TS), impact strength and swelling resistance of PVC. Addition of NBR also increased the stiffness of PVC due to higher elasticity of NBR as compared to PVC. Optimum impact strength, TS and swelling resistance was achieved with the addition of 10 wt. % NBR-GO. Good miscibility between NBR and PVC, and additional reinforcement by GO is responsible for enhancement of impact and TS. NBR-GO showed greater miscibility in PVC as compared to NBR as proven by morphological observation under scanning electron microscope. Morphological observation reveals that micro-cracks formation on PVC/30NBR surface which is responsible for low impact, tensile and swelling properties as compared to PVC/30NBR-GO composite.

scholarly journals INFLUENCE OF ANYLES D, L- CAMPHORA ON THERMAL OXIDATING STABILITY OF BUTADIENE RUBBER BASED ELASTOMER

2021 ◽  
pp. 47-52
Author(s):  
A. A. Vernigora ◽  
D. A. Nilidin ◽  
A. V. Davidenko ◽  
Ngok Tu Phan ◽  
S. G. Gubin ◽  
...  
Keyword(s):  
Nitrile Rubber ◽  
Butadiene Rubber ◽  
Tetramethylthiuram Disulfide ◽  
Oxidative Aging ◽  
Butadiene Nitrile Rubber ◽  
Thermal Oxidative Aging ◽  
First Time

The influence of aniles DL-camphor as N-[(1RS)-camphane-2-ylidene]-2-methylaniline, N-[(1RS)-camphane-2-ylidene]-2-ethylaniline and N-[(1RS)-camphane-2-ylidene]aniline on vulcanization and resistance of butadiene nitrile rubber based elastomers to thermal oxidative aging was studied for the first time. The prospects of using aniles DL-camphor as anti-aging agents have been established. The best effect is achieved when using N-[(1RS)-camphane-2-ylidene]-2-methylaniline in combination with an effective vulcanisation system including sulfur donors tetramethylthiuram disulfide, 4,4'-dithiodimorpholine, and N-cyclohexylbenzothiazole-2-sulphenamide.

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