短玻璃纤维修饰剂三醇 - - 异布烯多面二氧化作为聚烯矩阵的界面:阻燃效应和机械性能
Ana Beatriz Morales Cepeda1, Diego Armando Quiñones Lopez1, Saúl Sánchez Valdez2
1Centro de Investigación en Petroquímica, Tecnológico Nacional de México/Instituto Tecnológico de Ciudad Madero, Parque Industrial Tecnia, Bahía de Aldahir S/N, Altamira C.P. 89600, Tamaulipas, Mexico.
Polymers
|August 29, 2024
概括
用修饰玻璃纤维的聚烯复合材料显示了增强的拉伸强度和断裂点,但影响强度降低. 随着多面性寡合性丝丝二氧化 (TSI-POSS) 含量增加,火焰阻燃性得到改善.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物科学 聚合物科学
- 纳米技术纳米技术
背景情况:
- 聚烯 (PP) 是一种具有广泛应用的多功能聚合物.
- 提高PP的机械和阻燃性能对于先进的应用至关重要.
- 填充剂的表面修改可以提高复合材料的性能.
研究的目的:
- 调查多面寡合性丝二氧化 (TSI-POSS) 表面修饰对玻璃纤维增强聚烯 (PP) 的影响.
- 评估不同TSI-POSS度对PP复合材料的机械,热和阻燃性能的影响.
主要方法:
- 短玻璃纤维被表面修饰,含有不同度的三醇-异布,TSI-POSS.
- 改性纤维作为填充物被纳入聚烯 (PP) 基质中.
- 进行了机械测试 (拉力,冲击),动态机械分析,热分析和火焰行为测试.
主要成果:
- 增加的TSI-POSS度提高了PP复合材料的断裂点和拉伸强度.
- 撞击强度随着更高的STI-POSS负载而降低.
- 动态机械和热分析显示了显著的性能变化.
- 聚合物的燃烧速度随着TSI-POSS含量增加而下降.
结论:
- 使用TSI-POSS对玻璃纤维的表面修改提供了一种可行的策略,以改善PP复合材料的性能.
- 在PP复合材料中,TSI-POSS充当增强剂和阻燃剂.
- 在改善拉伸性能和降低冲击强度之间存在一个权衡,需要谨慎的配方.
相关概念视频
01:26Polymer Classification: Stereospecificity
2.4K
Polymerization generates chiral centers along the entire backbone of a polymer chain. Accordingly, the stereochemistry of the substituent group has a significant effect on polymer properties. Polymers formed from monosubstituted alkene monomers feature chiral carbons at every alternate position in the polymer backbone. Relative to the predominant orientation of substituents at the adjacent chiral carbons, the polymer can exist in three different configurations: isotactic, syndiotactic, and...
2.4K
01:14Polymer Classification: Architecture
2.7K
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...
2.7K
01:22Fiber Reinforced Concrete
71
Fiber-reinforced concrete significantly enhances the structural and nonstructural properties of traditional concrete by incorporating fibers like steel, glass, and polymers. These fibers, varying from natural ones such as sisal and cellulose to manufactured ones like polypropylene and Kevlar, are mixed into hydraulic cement with aggregates. Steel fibers, often preferred for their robustness, contribute to improved ductility, toughness, and post-cracking performance. The concrete is classified...
71
01:08Molecular Weight of Step-Growth Polymers
2.2K
Step growth polymerization involves bi or multifunctional monomers. Bifunctional monomers react to form linear step growth polymers, whereas multifunctional monomers react to form non-linear or branched polymers.
As the step-growth polymerization involves step-wise condensation of monomers, the molecular weight also builds up eventually. Consequently, high molecular weight polymers are obtained at the late stages of the polymerization, where 99% of monomers have been consumed.
The extent of the...
As the step-growth polymerization involves step-wise condensation of monomers, the molecular weight also builds up eventually. Consequently, high molecular weight polymers are obtained at the late stages of the polymerization, where 99% of monomers have been consumed.
The extent of the...
2.2K
01:30Superplasticizers
81
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,...
81