Freezing/melting transition of polymer chains on the diamond lattice

1986 ◽  
Vol 19 (4) ◽  
pp. 1128-1130 ◽  
Author(s):  
Richard H. Boyd
Keyword(s):  
Diamond Lattice ◽  
Polymer Chains ◽  
Melting Transition

Statistics of polymer chains embedded on a diamond lattice. II. Results for arbitrary trans and gauche weightings

1982 ◽  
Vol 76 (12) ◽  
pp. 6384-6392 ◽  
Author(s):  
W. K. Schroll ◽  
A. B. Walker ◽  
M. F. Thorpe
Keyword(s):  
Diamond Lattice ◽  
Polymer Chains

Quest for electroconducting structural polymers: CNTs/Polybond nanocomposites with improved electrical and mechanical properties

2017 ◽  
Vol 37 (6) ◽  
pp. 599-606
Author(s):  
Muhammad Sarfraz
Keyword(s):  
Mechanical Properties ◽  
Testing Machine ◽  
Chemical Properties ◽  
Sem Analysis ◽  
Polymer Chains ◽  
Melting Transition ◽  
Scanning Calorimetry ◽  
Melt Compounding ◽  
Structural Polymer ◽  
Chemical Resistivity

Abstract Electroconducting structural polymer-based nanocomposites were prepared by incorporating carbon nanotubes (CNTs) into commercially available Polybond (PB) using the melt compounding technique. The structural, morphological, electrical, thermal, mechanical, and chemical properties of the nanocomposites were investigated via Fourier-transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), differential scanning calorimetry, thermogravimetric analysis, high resistance meter, a Universal Testing Machine (UTM), and chemical resistivity measurements, respectively. FTIR spectra showed the successful grafting of CNT functional groups onto polymer chains. SEM analysis confirmed that the optimum state of dispersion was made for the nanocomposites. Electrical conductivity, melting transition temperatures, mechanical properties, and chemical resistance were improved by incorporating CNTs into PB.

The dislocation structure of a 10° [110] tilt boundary in silicon

1983 ◽  
Vol 41 ◽  
pp. 114-115
Author(s):  
B. Cunningham ◽  
D.G. Ast
Keyword(s):  
Dislocation Structure ◽  
Tilt Angle ◽  
Imaging Technique ◽  
Diamond Lattice ◽  
Tilt Boundary ◽  
Formation Mechanisms ◽  
Diffraction Contrast ◽  
Lattice Fringe ◽  
Tilt Boundaries ◽  
Chemically Vapor Deposited

There have Been a number of studies of low-angle, θ < 4°, [10] tilt boundaries in the diamond lattice. Dislocations with Burgers vectors a/2<110>, a/2<112>, a<111> and a<001> have been reported in melt-grown bicrystals of germanium, and dislocations with Burgers vectors a<001> and a/2<112> have been reported in hot-pressed bicrystals of silicon. Most of the dislocations were found to be dissociated, the dissociation widths being dependent on the tilt angle. Possible dissociation schemes and formation mechanisms for the a<001> and a<111> dislocations from the interaction of lattice dislocations have recently been given.The present study reports on the dislocation structure of a 10° [10] tilt boundary in chemically vapor deposited silicon. The dislocations in the boundary were spaced about 1-3nm apart, making them difficult to resolve by conventional diffraction contrast techniques. The dislocation structure was therefore studied by the lattice-fringe imaging technique.

Shape of Confined Polymer Chains

1997 ◽  
Vol 7 (3) ◽  
pp. 433-447 ◽  
Author(s):  
C. E. Cordeiro ◽  
M. Molisana ◽  
D. Thirumalai
Keyword(s):  
Polymer Chains ◽  
Confined Polymer ◽  
Confined Polymer Chains

Dynamics of polymer chains trapped in a slit

1977 ◽  
Vol 38 (10) ◽  
pp. 1285-1291 ◽  
Author(s):  
F. Brochard
Keyword(s):  
Polymer Chains

SuFExable Polymers with Helical Structures Derived from Thionyl Tetrafluoride (SOF4)

2019 ◽  
Author(s):  
Suhua Li ◽  
Gencheng Li ◽  
Bing Gao ◽  
Sidharam P. Pujari ◽  
Xiaoyan Chen ◽  
...  
Keyword(s):  
Functional Polymers ◽  
Polymer Chains ◽  
New Materials ◽  
Helical Structures ◽  
Polymer Backbone ◽  
Silyl Ethers ◽  
Helical Polymer ◽  
Key Characteristics ◽  
Post Modification ◽  
Individual Polymer

The first SuFEx click chemistry synthesis of SOF<sub>4</sub>-derived copolymers based upon the polymerization of bis(iminosulfur oxydifluorides) and bis(aryl silyl ethers) is described. This novel class of SuFEx polymer presents two key characteristics: First, the newly created [-N=S(=O)F-O-] polymer backbone linkages are themselves SuFExable and primed to undergo further high-yielding and precise SuFEx-based post-modification with phenols or amines to yield branched functional polymers. Second, studies of individual polymer chains of several of these new materials indicate the presence of helical polymer structures, which itself suggests a preferential approach of new monomers onto the growing polymer chain upon the formation of the stereogenic linking moiety.

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