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Plasticizers

Plasticizers

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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相关实验视频

Updated: Jul 23, 2025

A Facile and Eco-friendly Route to Fabricate PolyLactic Acid Scaffolds with Graded Pore Size

A Facile and Eco-friendly Route to Fabricate PolyLactic Acid Scaffolds with Graded Pore Size

Published on: October 17, 2016

环境影响评估悬浮PVC生产过程使用计算机辅助工艺工程

Ángel Darío González-Delgado¹, Miguel Ramos-Olmos², Eduardo Aguilar-Vásquez¹

¹Nanomaterials and Computer Aided Process Engineering Research Group (NIPAC), Chemical Engineering Department, Universidad de Cartagena, Cartagena, Bolivar, Colombia.

|July 14, 2023

概括

这项研究评估了悬浮聚乙烯 (PVC) 生产对环境的影响. 天然气是首选的燃料,而PVC生产的影响低于聚乙烯或聚烯.

关键词:

在PVC中,PVC是PVC.计算机辅助工艺工程计算机辅助工艺工程环境分析环境分析聚合物是一种聚合物.可持续性可持续性的可持续性

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相关实验视频

Last Updated: Jul 23, 2025

A Facile and Eco-friendly Route to Fabricate PolyLactic Acid Scaffolds with Graded Pore Size

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Published on: March 11, 2017

科学领域:

化学工程是化学工程的重要组成部分.
环境科学环境科学
材料科学材料科学材料科学

背景情况:

越来越多的环境法规需要可持续的化学品生产.
塑料行业,包括聚乙烯 (PVC),因其对环境的影响而面临审查.
环境评估对于平衡工业需求与生态保护至关重要.

研究的目的:

对悬浮聚乙烯 (PVC) 生产过程进行环境评估.
使用废物减少算法 (WAR) 量化潜在的环境影响 (PEI).
确定关键影响区域,并比较不同燃料类型的可持续性.

主要方法:

使用废物减少算法 (WAR) 进行环境评估.
基于发电速度和输出速度的量化潜在环境影响 (PEI).
分析了四个不同的操作案例,并评估了三种不同的燃料类型 (天然气,液体,煤炭).

主要成果:

聚乙烯生产过程将高影响原材料 (VCM) 转化为低影响产品 (PVC).
能源消耗对PEI有很大的贡献,特别是在大气类别 (AP和GWP) 中,占总影响的91%.
天然气被确定为最合适的燃料,与液体和固体燃料相比,它对环境的影响较低.

结论:

悬浮PVC的生产是环境可接受的,其产出影响明显低于聚乙烯或聚烯.
能源消耗是推动PVC生产环境足迹的最关键因素.
优化燃料来源,优先选择天然气,是减轻PVC制造对环境的影响的关键.