6533b851fe1ef96bd12a8c7a
RESEARCH PRODUCT
Dielectric behaviour of a γ-irradiated polycarbonate
F. P. La MantiaD. Aciernosubject
Range (particle radiation)Materials sciencePolymers and PlasticsMoistureIntrinsic viscosityAnalytical chemistryGeneral ChemistryDielectricCondensed Matter Physicsvisual_artPolymer chemistryMaterials Chemistryvisual_art.visual_art_mediumIrradiationPolycarbonateGlass transitionLine (formation)description
Dielectric measurements on a γ-irradiated polycarbonate in a dose range 0–20 Mrad and at test frequencies of 103 and 104 Hz have been carried out. The glass transition temperature shows a maximum at 3.5 Mrad and then decreases at larger doses. This result is in line with other experiments (intrinsic viscosity, dynamic-mechanical measurements, etc) already reported: the Tg values are however larger in the present results. This is probably due to the plasticizing action of the absorbed moisture present in the previous tests. A Tg vs 1/[n]2 plot (1/[n]2 is proportional to 1/m ) allows to find the value of the glass transition point at an infinite molecular weight and the dependency of Tg on molecular weight.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1980-03-01 | Polymer Bulletin |