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相关概念视频

Plasticizers01:31

Plasticizers

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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...
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Superplasticizers01:30

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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,...
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Types of Step-Growth Polymers: Polyesters01:20

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The introduction of polyesters has brought major development to the textile industry. The wrinkle-free behavior of polyester blends has eliminated the need for starching and ironing clothes.
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Plastic Behavior01:21

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A material's elastic behavior is characterized by the disappearance of stress once the load is removed, allowing the material to return to its original state. However, when stress surpasses the yield point, yielding commences, marking the onset of plastic deformation or permanent set. This change from elastic to plastic behavior is influenced by the peak stress value and the duration before the load is removed. An intriguing observation occurs when a specimen is loaded, unloaded, and...
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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...
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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...
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相关实验视频

Updated: Jul 16, 2025

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改进基于粉的包装材料:优化塑化剂和工艺参数.

Yue Wu1, Rongji Tang1, Anfu Guo1

  • 1School of Mechanical and Automotive Engineering, Liaocheng University, Liaocheng 252000, China.

Materials (Basel, Switzerland)
|September 9, 2023
PubMed
概括

开发环保的基于粉的包装需要优化复合塑化剂和加工. 这项研究通过降低粉晶度来增强机械性能,产生更强,更有弹性的材料用于绿色生产.

关键词:
盒子Behnken设计设计优化塑化剂的优化优化响应表面方法 响应表面方法基于粉的复合包装材料.热塑性粉热塑性粉

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相关实验视频

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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
  • 绿色化学 绿色化学

背景情况:

  • 传统的塑料包装带来了环境问题,需要生物可降解的替代品.
  • 基于粉的材料提供了一个可持续的解决方案,但由于粉的高晶度和纤维相容性差,它面临机械强度的挑战.

研究的目的:

  • 提高基于粉的包装材料的机械性能.
  • 优化复合塑化剂和工艺参数的使用,以提高性能.

主要方法:

  • 使用复合塑化剂 (甘油和D-果糖) 来破坏粉的气结合并降低晶度.
  • 采用响应表面方法 (RSM) 来优化成型温度,时间和交流内容.
  • 使用扫描电子显微镜 (SEM) 和X射线晶体学特征材料结构.
  • 用富里埃变换红外光谱法 (FTIR) 分析化学相互作用.

主要成果:

  • 复合塑化剂有效地降低了粉的结晶性,改变了颗粒形态.
  • 甘油和D-果糖与粉形成了新的键,增强了塑性效应.
  • 优化的RSM参数 (198°C,5.4分钟,0.84gAC) 显著改善了材料性能.
  • 与非优化材料相比,拉伸强度增加了12.2%,反弹率增加了8.1%.

结论:

  • 优化的复合塑化剂和工艺参数对于提高粉包装的机械性能至关重要.
  • 这种方法为生产高性能,环保的包装材料提供了一种可行的方法.
  • 该研究表明,成功的策略是克服可生物降解粉基材料的局限性.