Tracking free volume changes in bisphenol-a based polycarbonate sheets after treatment with liquid acetone

2017 ◽  
Vol 25 (1) ◽  
Author(s):  
Hamdy F. M. Mohamed ◽  
Ahmed Owais
Keyword(s):  
Bisphenol A ◽  
Free Volume ◽  
Volume Changes ◽  
Liquid Acetone

Tracking of the effects of the plasticizer on the water uptake and free volume changes of methylcellulose

2007 ◽  
Vol 18 (11) ◽  
pp. 921-924 ◽  
Author(s):  
Klára Pintye-Hódi ◽  
Károly Süvegh ◽  
Tamás Marek ◽  
Romána Zelkó
Keyword(s):  
Free Volume ◽  
Water Uptake ◽  
Volume Changes

Effect of head group size on the photoswitching applications of azobenzene Disperse Red 1 analogues

2014 ◽  
Vol 2 (36) ◽  
pp. 7505-7512 ◽  
Author(s):  
Alexis Goulet-Hanssens ◽  
T. Christopher Corkery ◽  
Arri Priimagi ◽  
Christopher J. Barrett
Keyword(s):  
Free Volume ◽  
Group Size ◽  
Head Group ◽  
Volume Changes ◽  
Disperse Red 1

We investigate the effect of the increased molecular bulk in the ‘head’ group for a class of newly synthesized azobenzene chromophores and demonstrate that motifs with larger free-volume changes during isomerization drive photoinduced macromolecular phenomena.

A Positron-Annihilation-Lifetime study of Polymer Blends

1993 ◽  
Vol 321 ◽  
Author(s):  
J. Liu ◽  
Y. C. Jean ◽  
H. Yang
Keyword(s):  
Bisphenol A ◽  
Polymer Blends ◽  
Positron Annihilation ◽  
Free Volume ◽  
Weight Fraction ◽  
Bisphenol A Polycarbonate ◽  
Positron Annihilation Lifetime ◽  
Miscible Blend ◽  
Immiscible Blend ◽  
Free Volume Hole

ABSTRACTPositron-annihilation-lifetime (PAL) spectroscopy has been utilized to investigate the free-volume properties of two types of polymer blends, a miscible blend of bisphenol-A polycarbonate (PC) and tetramethyl bisphenol-A polycarbonate (TMPC), and an immiscible blend of PC and polystyrene (PS). In the miscible blend, the free-volume hole size and its fraction follow a linear relationship with respect to the weight fraction while in the immiscible blend, the relationship is not linearly additive. The free-volume hole distributions in the immiscible blend are found to be significantly broader than those in the pure polymers. The difference is thought to be a result of the free volume formed and associated with the conformation and interchain packing between the dissimilar chains in incompatible polymers.

Positron Annihilation Lifetime Studies on Free Volume Changes in Polymers by CO2 Conditioning

1994 ◽  
Vol 175-178 ◽  
pp. 789-792 ◽  
Author(s):  
K. Tanaka ◽  
M. Ito ◽  
Hideki Kita ◽  
Katsutomo Okamoto ◽  
Yasuo Ito
Keyword(s):  
Positron Annihilation ◽  
Free Volume ◽  
Volume Changes ◽  
Positron Annihilation Lifetime ◽  
Lifetime Studies

Investigation of chemi-crystallization and free volume changes of high-density polyethylene weathered in a subtropical humid zone

2016 ◽  
Vol 65 (12) ◽  
pp. 1474-1481 ◽  
Author(s):  
Jian Xiong ◽  
Kai Ni ◽  
Xia Liao ◽  
Jingjun Zhu ◽  
Zhu An ◽  
...  
Keyword(s):  
Free Volume ◽  
High Density Polyethylene ◽  
High Density ◽  
Volume Changes ◽  
Humid Zone
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