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Free volume and the annealing and antiplasticizing of bisphenol A polycarbonate

✍ Scribed by Richard E. Robertson; Catherine W. Joynson

Publisher
John Wiley and Sons
Year
1972
Tongue
English
Weight
386 KB
Volume
16
Category
Article
ISSN
0021-8995

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Physical aging of bisphenol A polycarbon
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The physical aging of bisphenol A polycarbonate was studied using the differential scanning calorimetry technique. Cowie and Ferguson's model and Williams-Watts function were used to analyze the data. It is confirmed that the relation ⌬H Ο± (T a ) Ο­ ⌬C p (T g Οͺ T a ), where ⌬H Ο± (T a ) is the value o

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## Abstract Polyamide 6 (PA6) was studied using positron annihilation lifetime spectroscopy (PALS). From the __ortho__‐positronium lifetime Ο„~3~ the size of local free volumes (holes) was estimated. In dry PA6 the mean hole volume __v__ varied between 70 Γ…3 and 128 Γ…^3^ when the temperature increas

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Analog calorimetry is used as a tool to study the interaction of polystyrene, PS, with bisphenol-A polycarbonate, PC, and with tetramethyl bisphenol-A polycarbonate, TMPC. Electrostatic charge calculations were used as a guide to divide polymer repeat units and analogs into groups. A mean-field bina