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An improved dilatometer for polymers based on beta‐particle absorption
Author(s) -
MartinLöf S.,
Söremark Ch.
Publication year - 1971
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1971.070150614
Subject(s) - dilatometer , materials science , absorption (acoustics) , analytical chemistry (journal) , range (aeronautics) , porosity , particle (ecology) , polymer , particle size , atmospheric temperature range , thermal expansion , thermodynamics , composite material , chemistry , physics , chromatography , geology , oceanography
The theoretical background and the operation of a new dilatometric technique based on the absorption of beta particles is described. The thermal expansion of the samples is determined by their change in weight per unit area with change in temperature. The experimental accuracy in a determination of a relative change in weight per unit area is, at a counting time of 10 3 sec, approximately 4 × 10 −5 , which is close to the theoretical value. The applicability of the new device is illustrated by six runs on five different samples, among which hygroscopic and porous samples are represented. The temperature range covered is −60° to +70°C.