The effect of composition on cooperative relaxation properties of random copolymers

1980 ◽  
Vol 2 (1) ◽  
pp. 25-30 ◽  
Author(s):  
Ivan Havlíček ◽  
Michal Ilavský ◽  
Jaroslav Hrouz
Keyword(s):  
Random Copolymers ◽  
Relaxation Properties ◽  
Cooperative Relaxation

Electron microscopy of crystalline structure in thermotropic random copolymers

1991 ◽  
Vol 49 ◽  
pp. 1054-1055
Author(s):  
Afzana Anwer ◽  
S. Eilidh Bedford ◽  
Richard J. Spontak ◽  
Alan H. Windle
Keyword(s):  
Electron Microscopy ◽  
Crystalline Structure ◽  
Liquid Crystalline ◽  
Elevated Temperatures ◽  
Random Copolymers ◽  
Molecular Characteristics ◽  
Scanning Calorimetry ◽  
X Ray ◽  
Identical Monomer ◽  
Periodic Layer

Random copolyesters composed of wholly aromatic monomers such as p-oxybenzoate (B) and 2,6-oxynaphthoate (N) are known to exhibit liquid crystalline characteristics at elevated temperatures and over a broad composition range. Previous studies employing techniques such as X-ray diffractometry (XRD) and differential scanning calorimetry (DSC) have conclusively proven that these thermotropic copolymers can possess a significant crystalline fraction, depending on molecular characteristics and processing history, despite the fact that the copolymer chains possess random intramolecular sequencing. Consequently, the nature of the crystalline structure that develops when these materials are processed in their mesophases and subsequently annealed has recently received considerable attention. A model that has been consistent with all experimental observations involves the Non-Periodic Layer (NPL) crystallite, which occurs when identical monomer sequences enter into register between adjacent chains. The objective of this work is to employ electron microscopy to identify and characterize these crystallites.

Fluctuation Theory of Random Copolymers

1995 ◽  
Vol 5 (3) ◽  
pp. 365-377 ◽  
Author(s):  
Andrey V. Dobrynin ◽  
Igor Ya. Erukhimovich
Keyword(s):  
Fluctuation Theory ◽  
Random Copolymers

Fluctuation Theory of Charged AB-Random Copolymers

1995 ◽  
Vol 5 (8) ◽  
pp. 1241-1253 ◽  
Author(s):  
Andrey V. Dobrynin
Keyword(s):  
Fluctuation Theory ◽  
Random Copolymers

WRM ALLOY C15500

Alloy Digest ◽  
1999 ◽  
Vol 48 (10) ◽  
Keyword(s):  
Physical Properties ◽  
Tensile Properties ◽  
Copper Alloy ◽  
Heat Treating ◽  
Rolling Mills ◽  
Relaxation Properties

Abstract WRM Alloy C15500 is a copper alloy with one of the best combinations of electrical, mechanical, and relaxation properties. This datasheet provides information on composition, physical properties, elasticity, and tensile properties. It also includes information on forming, heat treating, machining, and joining. Filing Code: CU-616. Producer or source: Waterbury Rolling Mills Inc. Originally published May 1998, corrected October 1999.

Relaxation Properties of Terrace Boards Containing the Combinated Wood and Mineral Fillers

2019 ◽  
Vol 768 (3) ◽  
pp. 57-63
Author(s):  
A.A. ASKADSKII ◽  
◽  
A.V. MATSEEVICH ◽  
K.S. PIMINOVA ◽  
O.A. GORBACHEVA ◽  
...  
Keyword(s):  
Relaxation Properties ◽  
Mineral Fillers
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