Most of the values are from the CRC Handbook of Chemistry and Physics.
The water absorbtion and dielectric strength values are from Mcmaster-Carr bar stock material product details.
The glass transition and melting point values are from
Ref: W. M. Haynes, T. J. Bruno, and D. R. Lide, CRC Handbook of Chemistry and Physics 97th Edition. Boca Raton, FL: Taylor & Francis Group, 2016.