Superplasticizer
Superplasticizer. Superplasticizers ( SPs ), also known as high range water reducers, are additives used in making high strength concrete. Plasticizers are chemical compounds that enable the production of concrete with approximately 15% less water content. Superplasticizers allow reduction in water content by 30% or more.
Plasticizer
It was commonly thought that plasticizers work by embedding themselves between the chains of polymers, spacing them apart (increasing the "free volume"), [3] [4] or swelling them and thus significantly lowering the glass transition temperature for the plastic and making it softer.
What Plasticizers Do & How They Affect Properties | Osborne
Plasticizers act like a lubricant among polymer chains to reduce rigidity. Without them, synthetic polymer materials would be too brittle and rigid for any practical purpose. For example, plasticizers give rubber its extensibility. Approximately 90% of all plasticizers are used in polyvinyl chloride, or PVC.
Plasticizer - an overview | ScienceDirect Topics
7.2.8 Plasticizers. Plasticizers can increase or decrease polymer degradation rates; thus, addition of plasticizers to a disposable biodegradable biopolymer can be used to control the operative degradation rate of the material. Internal or external plasticizers can be used for this purpose.
Plasticizer - an overview | ScienceDirect Topics
Plasticizer loss causes plasticized PVC to shrink and become stiff. This can occur quickly at room temperature with low-molecular-weight plasticizers. As the molecular weight of plasticizer is increased, permanence at room or elevated temperature improves.
- What is a plasticizer & how does it work?
- A plasticizer is an additive that when added to another material makes that material softer or pliable. Although this definition can be applied to a variety of products, the word “plasticizer” generally refers to materials used in plastics.
- What is a primary plasticizer & a secondary plasticizer?
- Plasticizers are used to convert PVC, a rigid plastic, into a soft, flexible, and elastic material. A plasticizer that is compatible with PVC and exhibits low volatility, good permanence, and high efficiency is referred to as a primary plasticizer. A secondary plasticizer has the opposite characteristics of a primary plasticizer.
- How to make a plastic product more flexible by adding plasticizers?
- The process of making the final plastic product more flexible by adding plasticizers is called plasticization. By adding the right type and amount of plasticizer, you can tweak the polymer properties to get exactly what you need.
- Why do plasticizers change properties?
- This change is due to the addition of specific additives, especially plasticizers. A plasticizer is a non-volatile substance incorporated in a plastic or elastomer. It changes the thermal and mechanical properties of the material. The expected property changes in a plasticized plastic or elastomer are as follows:
- Why are plasticizers important?
- Plasticizers prevent the development of microcracks in the polymer matrix. They thereby enhance material durability and resistance to mechanical stress. Well-chosen plasticizers can also improve resistance to UV exposure and chemical attack. This contributes to the long-term stability of the polymer.
- What is plasticization in chemistry?
- The term plasticization refers to the softening and increase in flexibility of a polymer. This change is due to the addition of specific additives, especially plasticizers. A plasticizer is a non-volatile substance incorporated in a plastic or elastomer. It changes the thermal and mechanical properties of the material.
