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What is the function of plasticizer?

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+1 vote
in Food Packaging Technology by (63.0k points)
What is the function of plasticizer?

(a) Improve rheology

(b) Lower glass transition temperature

(c) Increase electrical stability

(d) Improve strength

The question was asked in a job interview.

My question is taken from Additives in Plastics in portion Plastic Polymers Structure & Properties of Food Packaging Technology

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The correct option is (b) Lower glass transition temperature

To elaborate: Plasticizers lower the glass transition temperature of plastics. Therefore, it helps to make the plastic more flexible. It does so by decreasing its viscosity in a way. Rheology is improved by lubricants. Substances like photoinitiators increase electrical stability and fillers improve strength.

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