Rhodanine-chitosan hydrogel as a novel antioxidant for acrylonitrile-butadiene rubber composites

IF 3.8 4区工程技术 Q2 CHEMISTRY, APPLIED Journal of Vinyl & Additive Technology Pub Date : 2023-09-22 DOI:10.1002/vnl.22053

T. A. Zidan

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Abstract

Rhodanine-chitosan (RC) hydrogel is examined as a novel antioxidant for acrylonitrile-butadiene rubber (NBR) composites. RC is added to NBR with different proportions (1, 2 phr) and compared to the commercial 2,2,4-trimethyl-1,2-dihydroquinoline polymer (TMQ) antioxidant. Physico-mechanical properties including tensile strength, elongation, and modulus are also studied. It is found that NBR composite containing 2 phr of RC has the most favorable mechanical properties. The formed composites were subjected to thermo-oxidative aging at 90°C for 1, 3, and 5 days. It is noticed that NBR composite containing 2 phr of RC is the most resistant to aging. Swelling properties and crosslink density are also determined. Composite containing 2 phr of RC has also higher crosslink density than the other prepared composites. The formed NBR composites containing both TMQ and RC are characterized by Fourier transforms infrared (FTIR), thermogravimetric analysis (TGA), and field emission scanning electron microscope (FESEM). The effect of aging on chemical structure of the composite and on surface morphology are also studied. It is found that the chemical structure of the composites containing 2 phr of RC is not affected by aging.

Highlights

Rhodanine-chitosan (RC) is assessed as a new antioxidant for acrylonitrile-butadiene rubber (NBR).
RC is incorporated into NBR at two different concentrations: 1 and 2 phr.
Mechanical, thermo-oxidative aging, and swelling properties are evaluated.
Thermal stability, Fourier transforms infrared and field emission scanning electron microscope are studied.
Vulcanizates with 2 phr of RC show the most superior properties.

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罗丹宁-壳聚糖水凝胶作为丙烯腈-丁二烯橡胶复合材料的新型抗氧化剂

研究将罗丹宁-壳聚糖（RC）水凝胶作为丙烯腈-丁二烯橡胶（NBR）复合材料的新型抗氧化剂。RC 以不同比例（1、2 phr）添加到丁腈橡胶中，并与商用 2,2,4-三甲基-1,2-二氢喹啉聚合物（TMQ）抗氧化剂进行比较。此外，还对拉伸强度、伸长率和模量等物理机械性能进行了研究。研究发现，含有 2 phr RC 的丁腈橡胶复合材料具有最有利的机械性能。将成型的复合材料在 90°C 下进行 1 天、3 天和 5 天的热氧化老化。结果表明，含有 2 phrus RC 的丁腈橡胶复合材料最耐老化。此外，还测定了膨胀特性和交联密度。含有 2 phr RC 的复合材料的交联密度也高于其他制备的复合材料。傅立叶变换红外（FTIR）、热重分析（TGA）和场发射扫描电子显微镜（FESEM）对所制备的含 TMQ 和 RC 的丁腈橡胶复合材料进行了表征。此外，还研究了老化对复合材料化学结构和表面形貌的影响。结果发现，含有 2 phr RC 的复合材料的化学结构不受老化的影响。亮点将罗丹宁-壳聚糖（RC）作为丙烯腈-丁二烯橡胶（NBR）的新型抗氧化剂进行了评估。在丁腈橡胶中加入两种不同浓度的 RC：1 和 2 phr。对其机械性能、热氧化老化性能和溶胀性能进行了评估。此外，还对热稳定性、傅立叶变换红外线和场发射扫描电子显微镜进行了研究。含有 2 phr RC 的硫化胶显示出最优异的性能。

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来源期刊

Journal of Vinyl & Additive Technology 工程技术-材料科学：纺织

CiteScore

5.40

自引率

14.80%

发文量

审稿时长

>12 weeks

期刊介绍： Journal of Vinyl and Additive Technology is a peer-reviewed technical publication for new work in the fields of polymer modifiers and additives, vinyl polymers and selected review papers. Over half of all papers in JVAT are based on technology of additives and modifiers for all classes of polymers: thermoset polymers and both condensation and addition thermoplastics. Papers on vinyl technology include PVC additives.