plasticise BrE
plasticize AmE

Chemical compatibility between the environment and the polymer govern the amount in which the environment can swell and plasticise the polymer.

As for phthalates, the chemical substances used to plasticise PVC, I have always campaigned for proactive measures with a view to protecting, as indeed we ought, this particularly vulnerable group of consumers, i.e. children.

If you plasticize your birth certificate, it will make it invalid.

On second thoughts we could plasticize and sit on it on the patio.

The soap is then passed through one or more additional refiners to further plasticize the soap mass.

Moisture is the most important of these factors, and affects the mix viscosity, acting to plasticize the extrudate.

Again Mr. Zuckerman exhorted him to plasticize.

Industry legend has it that Drackett researchers, while trying to find a cold oven cleaner, found that ammonia would plasticize food spills, making them easier to remove.

Waldo Semon and the B.F. Goodrich Company developed a method in 1926 to plasticize PVC by blending it with various additives.

Polyvinyl chloride (PVC) was produced experimentally in the 19th century but did not become practical to manufacture until 1926, when Waldo Semon of BF Goodrich Co. developed a method to plasticize PVC, making it easier to process.