Direct Measurement of Free Volume Properties in Polymeric Materials

2017 ◽  
pp. 295-327
Author(s):  
Asmita Sen Gupta
Keyword(s):  
Free Volume ◽  
Direct Measurement ◽  
Polymeric Materials ◽  
Volume Properties

Free-Volume Properties of Amorphous Polymers Probed by Positron Annihilation Spectroscopy

1990 ◽  
Vol 215 ◽  
Author(s):  
Y. C. Jean ◽  
F. Zandiehnadem ◽  
Q. Deng
Keyword(s):  
Positron Annihilation ◽  
Free Volume ◽  
Amorphous Materials ◽  
Polymeric Materials ◽  
Positron Annihilation Spectroscopy ◽  
Atomic Scale ◽  
Annihilation Radiation ◽  
Positron Annihilation Lifetime ◽  
Additional Information ◽  
Volume Properties

AbstractPositron annihilation spectroscopy (PAS) has been developed to characterize the free-volume properties of polymers. Positron annihilation lifetime measurements give direct information about the dimension, content, and hole-size distributions of free-volume in amorphous materials. The angular correlation of positron annihilation radiation measurements give additional information about the shape of the free-volume holes in oriented polymeric materials. The unique capability of PAS to probe free-volume properties is from the fact that positronium atom is preferentially trapped in the atomic-scale holes which have a size ranging from 1 to 10 Å.

Effects of boron nitrite in thermoplastic polyurethane on thermal, electrical and free volume properties

2018 ◽  
Vol 76 (8) ◽  
pp. 4087-4101 ◽  
Author(s):  
Fatih Dumludag ◽  
Murat Y. Yener ◽  
Emre Basturk ◽  
Seyfullah Madakbas ◽  
Vezir Kahraman ◽  
...  
Keyword(s):  
Free Volume ◽  
Thermoplastic Polyurethane ◽  
Volume Properties

Performance evaluation of polyamide TFC membranes: Effects of free volume properties on boron transport

Desalination ◽  
2018 ◽  
Vol 432 ◽  
pp. 104-114 ◽  
Author(s):  
Sung-Jo Kim ◽  
Doseon Han ◽  
Hye-Weon Yu ◽  
Brian E. O'Rourke ◽  
Yoshinori Kobayashi ◽  
...  
Keyword(s):  
Performance Evaluation ◽  
Free Volume ◽  
Volume Properties

Correlations between the free-volume properties and the miscibility of chitosan/polar polymers blend membranes

2008 ◽  
Vol 77 (9) ◽  
pp. 1062-1068 ◽  
Author(s):  
Zeng Minfeng ◽  
Sun Xudong ◽  
Wang Yun ◽  
Yao Xiandong ◽  
Xiao Huiquan ◽  
...  
Keyword(s):  
Free Volume ◽  
Polar Polymers ◽  
Volume Properties ◽  
Blend Membranes

Graphene networks and their influence on free-volume properties of graphene–epoxidized natural rubber composites with a segregated structure: rheological and positron annihilation studies

2015 ◽  
Vol 17 (18) ◽  
pp. 12175-12184 ◽  
Author(s):  
Canzhong He ◽  
Xiaodong She ◽  
Zheng Peng ◽  
Jieping Zhong ◽  
Shuangquan Liao ◽  
...  
Keyword(s):  
Natural Rubber ◽  
Positron Annihilation ◽  
Free Volume ◽  
Epoxidized Natural Rubber ◽  
Interfacial Region ◽  
Rubber Composites ◽  
Natural Rubber Composites ◽  
Volume Properties ◽  
Geometric Confinement ◽  
Segregated Structure

The motion of ENR chains is retarded by the geometric confinement of “GE networks”, producing a high-density interfacial region in the vicinity of GE nanoplatelets.

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