含有硫聚乙烯作为兼容剂的EPDM/NBR混合物的动力机械分析,形态学,物理机械和性能特性
Evgeniy Egorov1, Rakhymzhan Turmanov2, Rakhmetulla Zhapparbergenov2
1Department of Physical Chemistry and Macromolecular Compounds, Faculty of Chemistry and Pharmaceutics, Chuvash State University Named after I.N. Ulyanov, 15 Moskovsky Prosp., 428015 Cheboksary, Russia.
Polymers
|January 10, 2026
概括
硫聚乙烯 (CSM 40) 提高了乙烯二烯单体 (EPDM) / 乙烯 (NBR) 混合物的兼容性和性能. 这种相容在石油和碳化合物环境中表现出增强的强度,硬度和稳定性.
科学领域:
- 聚合物科学 聚合物科学
- 材料科学 材料科学 材料科学
- 技术 技术 技术
背景情况:
- 乙烯二烯单体 (EPDM) 和甲 (NBR) 是广泛使用的弹性体.
- 在EPDM/NBR混合物中实现最佳性能通常需要解决相相不兼容性.
- 兼容剂对于提高聚合物混合物的可混合性和性能至关重要.
研究的目的:
- 研究硫聚乙烯 (CSM 40) 作为兼容剂的作用.
- 评估CSM 40对EPDM/NBR火化物的固化,动态机械,形态和性能特性的影响.
- 为了确定兼容性化合物的适合性,用于暴露于油和碳化合物的应用.
主要方法:
- 动态机械分析 (DMA) 通过tan δ温度依赖来评估相相兼容性.
- 扫描电子显微镜 (SEM) 用于分析化物横截面的形态.
- 物理机械测试用于评估强度,硬度和耐老化等属性.
主要成果:
- DMA证实了EPDM/NBR (25/75 phr) 混合物与CSM 40的相相兼容性得到改善,由单模式tan δ峰值表示.
- 与不兼容样本相比,SEM在兼容样本中显示出较少明显的微孔结构.
- 具有CSM 40的火化物表现出增强的强度,硬度,以及对热氧化老化和工业油 (I-20A,SZhR-1) 的优越抗性.
结论:
- CSM 40有效地使EPDM/NBR (25/75 phr) 化合物兼容.
- 添加5phr CSM 40会产生具有稳定的物理机械性能和性能改善的火山化物.
- 这种相容化合物适用于制造暴露于油脂和碳化合物环境中的产品.
相关概念视频
Polymer Classification: Architecture
3.7K
Polymers are classified as linear or branched on the basis of their chain architecture. The polymer chains in linear polymers have a long chain-like structure with minimal to no branching at all. Even if a polymer features large substituent groups on the monomer, which appear as branches to the skeleton, it is not considered a branched polymer. A branched polymer contains secondary polymer chains that arise from the main polymer chain. The branching occurs when the polymer growth shifts from...
3.7K
Plasticizers
328
Water-reducers, or plasticizers, are chemical admixtures used in concrete to improve strength and workability. These additives reduce the water-cement ratio without compromising workability, lower the cement content while maintaining the same workability, or increase workability to assist concrete placement in inaccessible areas.
Plasticizers function by using surface-active agents to create repulsive electrostatic forces between cement particles. This dispersion enhances the concrete's...
Plasticizers function by using surface-active agents to create repulsive electrostatic forces between cement particles. This dispersion enhances the concrete's...
328
Superplasticizers
296
Superplasticizers are advanced admixtures that enhance the workability of concrete by lowering the water content without compromising the strength of the material. These substances are highly effective water reducers, improving concrete flow, making it easier to work with, and enabling concrete to reach inaccessible areas or densely reinforced sections without mechanical vibration. The key components in superplasticizers are either sulfonated melamine or naphthalene formaldehyde condensates,...
296
Olefin Metathesis Polymerization: Overview
2.5K
Recently, the development of olefin metathesis polymerization advanced the field of polymer synthesis. Simply put, the reorganization of substituents on their double bonds between two olefins in the presence of a catalyst is known as the olefin metathesis reaction. The use of metathesis reaction for polymer synthesis is called olefin metathesis polymerization.
Ruthenium-based Grubbs catalyst is the most commonly used catalyst for olefin metathesis polymerization. Grubbs catalyst consists of a...
Ruthenium-based Grubbs catalyst is the most commonly used catalyst for olefin metathesis polymerization. Grubbs catalyst consists of a...
2.5K
Olefin Metathesis Polymerization: Ring-Opening Metathesis Polymerization (ROMP)
3.1K
Ring-opening metathesis polymerization or ROMP involves strained cycloalkenes as starting materials. The mechanism of ROMP proceeds by reacting cycloalkene with Grubbs catalyst to give metallacyclobutane intermediate which undergoes a ring-opening reaction to form new carbene. The new carbene reacts with another molecule of cycloalkene. Repetition of these steps leads to the formation of an unsaturated open-chain polymer product. All these steps are reversible, however, relieving the ring...
3.1K
Olefin Metathesis Polymerization: Acyclic Diene Metathesis (ADMET)
2.2K
Acyclic diene metathesis polymerization or ADMET polymerization involves cross-metathesis of terminal dienes, such as 1,8-nonadiene, to give linear unsaturated polymer and ethylene. As ADMET is a reversible process, the formed ethylene gas must be removed from the reaction mixture to complete the polymerization process.
Similar to cross-metathesis, ADMET also involves the formation of metallacyclobutane intermediate by [2+2] cycloaddition of one of the double bonds of a terminal diene with...
Similar to cross-metathesis, ADMET also involves the formation of metallacyclobutane intermediate by [2+2] cycloaddition of one of the double bonds of a terminal diene with...
2.2K


