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plasticizers: types, uses, classification ... - polymer additives

Plasticizers: Types, Uses, Classification ... - Polymer Additives

A secondary plasticizer is one that typically cannot be used as the sole plasticizer in a plasticized polymer. Secondary plasticizers may have limited compatibility with the polymer and/or high volatility. They may or may not contain functional groups which allow them to solvate the polymer at processing temperatures.

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The classical picture on the mobility of polymer chain is more complex in the presence of plasticizer than that drawn by Fox&Flory for simple polymer chain. The molecules of plasticizer take control over mobility of the chain, and polymer chain does not show an increase of the free volume around polymer ends; in the case that the plasticizer ...

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plasticizer - an overview | sciencedirect topics

Plasticizer - an overview | ScienceDirect Topics

It is supposed that the function of the plasticizer is that its molecules are embedded between the individual polymer chains and disintegrate the polymer–polymer interactions. 50, 51 One of the most important properties of the polymers is known as the glass transition temperature ( T g ), which measures chain mobility.

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solubilization: plasticizers - basf

Solubilization: Plasticizers - BASF

The glass transition temperature of each polymer can be reduced by introducing plasticizing substances that impact the interaction of polymer chains. In the area of solid dispersions such a reduction of glass transition temperature might be necessary for e.g. decreasing the processing temperature in a hot melt extrusion process or reducing the ...

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antioxidants stabilizers selection for polyolefins ... - polymer additives

Antioxidants Stabilizers Selection for Polyolefins ... - Polymer Additives

Antioxidants Stabilizers Selection for Polyolefins (PP, PE) Polymer degradation is a natural phenomenon that cannot be totally stopped. It tends to deteriorate the physical & mechanical like molecular weight, melt flow rate, appearance, processing and thermal stability properties of the polymer.

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thermal degradation of polymers

Thermal degradation of polymers

Oxidation of the polymer. Although thermal degradation is defined as an oxygen free process it is difficult in practise to completely exclude oxygen. Where this is the case thermal oxidation is to be expected, leading to the formation of free radicals by way of hydroperoxides. These may then participate in thermal degradation reactions ...

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selecting plasticizers for adhesives and sealants

Selecting Plasticizers for Adhesives and Sealants

Similar to diluents, plasticizers are non-volatile solvents for the base resin and by being incorporated into the formulation, they separate the polymer chains and enable their deformation to be more easily accomplished. In this way, plasticizers can improve the processing characteristics of the adhesive as well as the end-properties.

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plastics additives - british plastics federation

Plastics Additives - British Plastics Federation

Help prevent "oxidation", the polymer reacting with oxygen. Oxidation can cause loss of impact strength, elongation, surface cracks and discolouration. Antioxidants help prevent thermal oxidation reactions when plastics are processed at high temperatures and light-assisted oxidation when plastics are exposed to UV light.

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polyvinyl chloride

Polyvinyl chloride

Plasticizers work by increasing the space and act as a lubricant between the PVC polymer chains. Higher levels of plasticizer result in softer PVC compounds and decrease tensile strength . A wide variety of substances can be used as plasticizers including phthalates , adipates , trimellitates , polymeric plasticizers and expoxidized vegetable oils.

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k-flex® 850s non-phthalate plasticizer - emerald kalama chemical

K-FLEX® 850S Non-Phthalate Plasticizer - Emerald Kalama Chemical

K-FLEX® 850S is a dibenzoate plasticizer optimized for performance, compatibility, and economy in waterborne latex applications. It is a very effective, low-VOC choice for waterborne adhesives, as well as hot melt adhesives and putty. With FDA approvals for direct food contact, K-FLEX 850S is a viable option for food packaging adhesives.

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