Question: An apparent paradox: Why does increasing molecular weight increase the glass transition temperature, but decrease the brittle temperature? Low molecular weight favors stability during processing

An apparent paradox: Why does increasing molecular weight increase the glass
transition temperature, but decrease the brittle temperature?
Low molecular weight favors stability during processing but high molecular weight
favors stability in the end-product. Explain.
Why does plasticizer lower electrical resistance and raise dielectric constant?
Why are lower-molecular-weight polymers more compatible with plasticizers?
Why does high molecular weight favor barrier performance?
An apparent paradox: Why does increasing molecular weight increase the glass

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