plasticizer

[plas-tuh-sahy-zer]
noun
1.
any of a group of substances that are used in plastics or other materials to impart viscosity, flexibility, softness, or other properties to the finished product.
2.
an admixture for making mortar or concrete workable with little water.

Origin:
1920–25; plasticize + -er1

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
plasticizer or plasticiser (ˈplæstɪˌsaɪzə)
 
n
any of a number of substances added to materials in order to modify their physical properties. Their uses include softening and improving the flexibility of plastics and preventing dried paint coatings from becoming too brittle
 
plasticiser or plasticiser
 
n

Collins English Dictionary - Complete & Unabridged 10th Edition
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Example sentences for plasticizers
Inclusion of plasticizers tends to lower tg and increase polymer flexibility.
These plasticizers are used similarly to those derived from terephthalic acid ester.
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