Mechanical, Water-Swelling, and Morphological Properties of Water-Swellable Thermoplastic Vulcanizates Based on High Density Polyethylene/Chlorinated Polyethylene/Nitrile Butadiene Rubber/Cross-Linked Sodium Polyacrylate Blends

Wei, Dongya; He, Ning; Zhao, Jing; Wang, Zhaobo

doi:10.1080/03602559.2014.974191

Cited by 6 publications

(4 citation statements)

References 15 publications

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“…Because the nitrogen atom exerted a strong attraction for αH, higher co‐crosslinking reaction of two adjacent CN occurred at 180°C (Scheme 1), it reduced the formation probability of carboxyl groups by hydrolysis of CN group. Thus, less water uptake led to a smaller weight gain of the specimen with higher CN wt% 30 …”

Section: Resultsmentioning

confidence: 99%

Investigation of the properties and aging mechanisms of vulcanized hydrogenated nitrile rubber in different mediums

Zhou

Zheng

et al. 2022

Polymers for Advanced Techs

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Packer rubber cylinders in oil drilling operations must withstand high pressure, high temperature, and destruction of mediums. To ensure the long-term service time of the hydrogenated nitrile rubber (HNBR) packer rubber cylinders, it is essential to understand the aging mechanism of HNBR in different aging environments. Four HNBR with various acrylonitrile contents (ACN 17%, 21%, 34%, and 43%) were pre-

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Section: Resultsmentioning

confidence: 99%

Investigation of the properties and aging mechanisms of vulcanized hydrogenated nitrile rubber in different mediums

Zhou

Zheng

et al. 2022

Polymers for Advanced Techs

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“…The obtained product was filtered in a vacuum filter, and then dried in air. As a polymer base for creating sleeves for swelling packers, oil-and gasoline-resistant thermostable nitrile butadiene rubber (NBR) is widely used [42][43][44]; synthetic isoprene rubber, methyl-styrene-butadiene rubber, ethylene propylene rubber and their mixtures are used to a lesser extent [45][46][47]. In this work, nitrile butadiene rubber grade BNKS-28 AMN was used.…”

Section: Carboxylation Of Cellulosementioning

confidence: 99%

Influence of Partially Carboxylated Powdered Lignocellulose from Oat Straw on Technological and Strength Properties of Water-Swelling Rubber

Cherezova,

Karaseva,

Nakyp

et al. 2024

Polymers

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The work is aimed at the development of an energy-saving technique involving the partial carboxylation of powdered lignocellulose products from the straw of annual agricultural plants and the use of the obtained products in rubber compositions as a water-swelling filler. Lignocellulosе powder from oat straw (composition: ɑ-cellulose—77.0%, lignin—3.8%, resins and fats—1.8%) was used for carboxylation without preliminary separation into components. Microwave radiation was used to activate the carboxylation process. This reduced the reaction time by 2–3 times. The synthesized products were analyzed by IR spectroscopy, thermogravimetry and scanning electron microscopy. Industrial product sodium carboxymethylcellulose (Na-CMC) was used as a swelling filler for comparison. The swelling fillers were fractionated by the sieve method; particles with the size of 0–1 mm were used for filling rubber compounds. The amount of swelling filler was 150 parts per 100 parts of rubber (phr). Due to the high filling of rubber compounds, plasticizer Oxal T-92 was added to the composition of a number of samples to facilitate the processing and uniform distribution of ingredients. The rubber composition was prepared in two stages. In the first stage, ingredients without swelling filler were mixed with rubber on a laboratory two-roll mill to create a base rubber compound (BRC). In the second stage, the BRC was mixed with the swelling filler in a closed laboratory plasti-corder rubber mixer, the Brabender Plasti-Corder® Lab-Station. Vulcanization was carried out at 160 °C. For the obtained samples, the physical-mechanical and sorption properties were determined. It has been shown that the carboxylated powdered lignocellulose from oat straw increases the strength properties of rubber in comparison with Na-CMC. It has been shown that when the carboxylated powdered lignocellulose from oat straw is introduced into the rubber composition, the degree of rubber swelling in aqueous solutions of various mineralizations increases by 50 and 100% in comparison with a noncarboxylated lignocellulose.

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“…All six samples in approximately 1 cm × 1 cm of area and 2 mm thickness were used for the measurement of swelling properties [30][31][32][33][34]. Three solvents (water, ethanol and toluene) were used in the experiment.…”

Section: Measurements Instruments and Conditions Swelling Propertiesmentioning

confidence: 99%

“…The measurements were also taken for multiple durations to nd the e ect of dipping time on the swelling of HNBR. The percentage swelling ratios for neat HNBR and its silica based composites for each solvent were then determined by the following formula [30][31][32][33][34]. …”

Section: Measurements Instruments and Conditions Swelling Propertiesmentioning

confidence: 99%

Influence of Silica (SiO2) Loading on the Thermal and Swelling Properties of Hydrogenated-Nitrile-Butadiene-Rubber/Silica (HNBR/Silica) Composites

2018

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Abstract:Hydrogenated-Nitrile-Butadiene-Rubber (HNBR) is known for its good physical strength. It is a widely used rubber in electrical insulation and other high performance applications. Performance of HNBR is a ected in high temperature and an aggressive uid environment. Adding silica to HNBR may overcome this problem. In order to investigate the e ect of uids and temperature on HNBR/silica composites we prepared multiple composites of HNBR with 8.3, 16.7, 33.4, 50 and 66.7 phr of silica (SiO ) by two roll compounding method. Swelling index and thermo gravimetric analyses were performed. Calculations of swelling indexes were performed at di erent time periods with ethanol, toluene and water. For thermo gravimetric analysis (TGA), thermo grams of samples were obtained and % char yields at 550• C were analyzed for all samples. Improvements with the addition of silica were recorded up to a great extent in both analyses. Swelling index decreased with the addition of silica as compared to neat HNBR and reached an optimum position with 50 phr silica loading in ethanol, 8.3 phr in water and 66.7 phr in toluene. Moreover, the HNBR composite with 66.7 phr of silica was found to be the highest thermally stable sample and lost less than 60% of weight at 550• C in comparison to neat HNBR in which 80% of weight loss occurred at 550• C.

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Mechanical, Water-Swelling, and Morphological Properties of Water-Swellable Thermoplastic Vulcanizates Based on High Density Polyethylene/Chlorinated Polyethylene/Nitrile Butadiene Rubber/Cross-Linked Sodium Polyacrylate Blends

Cited by 6 publications

References 15 publications

Investigation of the properties and aging mechanisms of vulcanized hydrogenated nitrile rubber in different mediums

Investigation of the properties and aging mechanisms of vulcanized hydrogenated nitrile rubber in different mediums

Influence of Partially Carboxylated Powdered Lignocellulose from Oat Straw on Technological and Strength Properties of Water-Swelling Rubber

Influence of Silica (SiO2) Loading on the Thermal and Swelling Properties of Hydrogenated-Nitrile-Butadiene-Rubber/Silica (HNBR/Silica) Composites

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