Plasticisation - an overview | ScienceDirect Topics
Plasticization of polyurethanes using binary plasticizers enables controlling physico-mechanical properties of segmented polyurethanes in a wide range. Mixtures of plasticizers oppositely influencing microphase segregation between hard and soft blocks are preferable to control properties of nano-heterogeneous block-structured polyurethanes.
Plasticizers - Cadogan - Major Reference Works - Wiley Online
Types of Plasticizer 2. Plasticizers in Common Use 2.1. ... Mechanism of Plasticizer Action. 3.1. The Lubricity Theory. ... Plasticizer Efficiency. 4.2.2. High
Plasticizer
In the concrete technology, plasticizers and superplasticizers are also called high range water reducers. When added to concrete mixtures, they confer a number of properties including improved workability and strength. The strength of concrete is inversely proportional to the amount of water added, i.e., the water-cement (w/c) ratio.
Plasticizers - Walters - - Major Reference Works - Wiley
The article contains sections titled: 1 Introduction 1.1 Definition 1.2 Types of Plasticization 1.3 Types of Plasticizer 2 Plasticizers in Common Use 2.1. Ortho-Phthalate Esters 2.2 Terephthala...
Handbook of Plasticizers, 3rd Edition | Chemtec Publishing
Chapter 11 contains data on the use of plasticizers in 61 groups of polymers. The information is grouped under the following sections – Frequently used plasticizers, Practical concentrations, Main functions performed by plasticizers, Mechanism of plasticizer action, Effect of plasticizers on polymer and other additives and Typical formulations.
- What is the mechanism of action of plasticizers?
- The mechanism of action of plasticizers is described, in terms of plasticization theory and the chemical modifications that occur during this process, which account for the excellent performance of some plasticizer molecules and the apparently poor softening ability of others.
- Why does plasticization occur?
- Indeed, plasticization occurs because of the ability of plasticizer molecules to create secondary bonds with polymer and to replace chain interactions by plasticizer-polymer bonds . Based on these considerations, plasticizers with low molecular weight and a few polar groups provide higher flexibility and plasticization.
- How do plasticizers affect lubricity?
- Plasticizer molecules swell the gel and facilitate the movement of polymer molecules, thus imparting flexibility. The lubricity and gel theories agree that plasticisers penetrate the structure of the polymer, separating chains and thus reducing intermolecular forces between them .
- How do Plasticizers improve polymer material flexibility & durability?
- Plasticizers improve polymer material flexibility and durability by lowering glass transition and cold flex temperatures. While many different classes of plasticizers have been synthesized and used...
- Can plasticizers reduce material degradation over time?
- The design of new plasticizers compatible with the polymer at high concentrations, tailored to be effective in lowering the glass transition temperature, and with a low tendency to migration could considerably reduce material degradation over time.
- What factors determine the success of plasticized systems?
- In this scenario, fundamental parameters such as solubility, compatibility, polarity, molecular weight, and functional groups of plasticizers play a crucial role in determining the success of plasticized systems while mitigating the drawbacks of the external plasticization .
