Combinatorial methods for polymer materials science: Phase behavior of nanocomposite blend films

2002 ◽  
Vol 42 (9) ◽  
pp. 1836-1840 ◽  
Author(s):  
Alamgir Karim ◽  
Eric Amis ◽  
Koray Yurekli ◽  
Ramanan Krishnamoorti ◽  
Carson Meredith
Keyword(s):  
Phase Behavior ◽  
Materials Science ◽  
Polymer Materials ◽  
Blend Films ◽  
Combinatorial Methods

Combinatorial Methods for Investigations in Polymer Materials Science

MRS Bulletin ◽  
2002 ◽  
Vol 27 (4) ◽  
pp. 330-335 ◽  
Author(s):  
J. Carson Meredith ◽  
Alamgir Karim ◽  
Eric J. Amis
Keyword(s):  
High Throughput Screening ◽  
Materials Science ◽  
Substrate Surface ◽  
Polymer Processing ◽  
Polymer Materials ◽  
Structure Property ◽  
Fundamental Properties ◽  
Recent Advances ◽  
Materials Research ◽  
Combinatorial Methods

AbstractWe review recent advances in the development of combinatorial methods for polymer characterization. Applied to materials research, combinatorial methodologies allow efficient testing of structure–property hypotheses (fundamental characterization) as well as accelerated development of new materials (materials discovery). Recent advances in library preparation and high-throughput screening have extended combinatorial methods to a wide variety of phenomena encountered in polymer processing. We first present techniques for preparing continuous-gradient polymer “libraries” with controlled variations in temperature, composition, thickness, and substrate surface energy. These libraries are then used to characterize fundamental properties such as polymer-blend phase behavior, thin-film dewetting, block-copolymer order–disorder transitions, and cell interactions with surfaces of biocompatible polymers.

Self-healable Functional Polymers based on Diels-Alder ‘Click Chemistry’ Involving Substituted Furan and Triazolinedione Derivatives; A Simple and Very Fast Approach

2021 ◽  
Author(s):  
Prantik Mondal ◽  
Gourhari Jana ◽  
Tuhin Subhra Pal ◽  
Pratim K. Chattaraj ◽  
Nikhil K Singha
Keyword(s):  
Click Chemistry ◽  
Materials Science ◽  
Functional Polymers ◽  
Diels Alder ◽  
Polymer Materials ◽  
Self Healing ◽  
Natural Phenomena ◽  
Science And Engineering ◽  
Fast Approach ◽  
Materials Science And Engineering

Nowadays, the design of functional polymer materials that can mimic natural phenomena, e.g., self-healing of skin cuts, has got a tremendous interest in materials science and engineering. Recently, 1,2,4-triazoline-3,5-dione (TAD)...

scholarly journals Design of Polymer Blends Based on Chitosan:POZ with Improved Dielectric Constant for Application in Polymer Electrolytes and Flexible Electronics

2020 ◽  
Vol 2020 ◽  
pp. 1-10 ◽  
Author(s):  
Shujahadeen B. Aziz ◽  
M. H. Hamsan ◽  
M. F. Z. Kadir ◽  
H. J. Woo
Keyword(s):  
Dielectric Constant ◽  
Dielectric Loss ◽  
Loss Tangent ◽  
Flexible Electronics ◽  
Elevated Temperatures ◽  
Electric Modulus ◽  
Polymer Materials ◽  
Blend Films ◽  
Optical Micrograph ◽  
Peak Broadening

There is a considerable demand for the development and application of polymer materials in the flexible electronic- and polymer-based electrolyte technologies. Chitosan (CS) and poly(2-ethyl-2-oxazoline) (POZ) materials were blended with different ratios to obtain CS:POZ blend films using a straightforward solution cast technique. The work was involved a range of characteristic techniques, such as impedance spectroscopy, X-ray diffraction (XRD), and optical microscopy. From the XRD spectra, an enhancement in the amorphous nature in CS:POZ blend films was revealed when compared to the pure state of CS. The enhancement was verified from the peak broadening in CS:POZ blend films in relative to the one in crystalline peaks of the CS polymer. The optical micrograph study was used to designate the amorphous and crystalline regions by assigning dark and brilliant phases, respectively. Upon increasing POZ concentration, the dielectric constant was found to increase up to ɛ′ = 6.48 (at 1 MHz) at 15 wt.% of POZ, and then a drop was observed beyond this amount. The relatively high dielectric constant and dielectric loss were found at elevated temperatures. The increase of POZ concentration up to 45 wt.% made the loss tangent to shift to the lower frequency side, which is related to increasing resistivity. The increases of dielectric constant and dielectric loss with temperature were attributed to the increase of polarisation. The loss tangent peaks were found to shift to the higher frequency side as temperature elevated. Obvious relaxation peaks were observed in the imaginary part of electric modulus, and no peaks were found in the dielectric loss spectra. The concentration dependent of M″ peaks was found to follow the same trend of loss tangent peaks versus POZ content. The relaxation process was studied in terms of electric modulus parameters.

Polymer Materials Science.

1974 ◽  
Vol 7 (1) ◽  
pp. 83
Author(s):  
Garth L. Wilkes
Keyword(s):  
Materials Science ◽  
Polymer Materials

Phase Behavior and Dewetting for Polymer Blend Films Studied by In Situ AFM and XPS:  From Thin to Ultrathin Films

Langmuir ◽  
2007 ◽  
Vol 23 (22) ◽  
pp. 11107-11111 ◽  
Author(s):  
Yonggui Liao ◽  
Jichun You ◽  
Tongfei Shi ◽  
Lijia An ◽  
Pradip Kumar Dutta
Keyword(s):  
Phase Behavior ◽  
Polymer Blend ◽  
Ultrathin Films ◽  
Blend Films

Polymer Materials Science: Novel Synthesis and Characterization of Supermolecular Structures

MRS Bulletin ◽  
1991 ◽  
Vol 16 (7) ◽  
pp. 20-22
Author(s):  
Curtis W. Frank
Keyword(s):  
Polymer Films ◽  
Evanescent Wave ◽  
Materials Science ◽  
Supermolecular Structure ◽  
Genetically Engineered ◽  
Polymer Materials ◽  
Molecular Organization ◽  
Optical Methods ◽  
Restricted Geometry

The two feature articles in this issue present numerous contrasts, but both reflect the vitality of research in polymer science today. David Tirrell and co-authors paint a picture of how the techniques of molecular biology may be applied to the synthesis of novel “proteinlike” polymers with control over molecular weight, composition, and stereoregularity that is unprecedented in the realm of traditional polymer chemistry. Wolfgang Knoll turns his attention to ultrathin polymer films with thicknesses comparable to molecular chain dimensions and demonstrates how evanescent wave optical methods may be used to provide spectroscopic as well as imaging information on the characterization of these “restricted geometry” systems.Both authors address the issue of supermolecular structure, whether approached from the synthetic or physical chemical viewpoints. Tirrell describes a series of target polymers, expressed by genetically engineered microorganisms, which may provide a fundamental understanding and control over chain folding, a critical morphological feature governing solid-state behavior of synthetic polymers. Knoll analyzes the fundamentals of evanescent wave optical methods for interrogating the molecular organization in polymer films that have considerable potential in electronic or photonic applications.

Polymer materials science

Polymer ◽  
1975 ◽  
Vol 16 (4) ◽  
pp. 312
Author(s):  
D.C Bassett
Keyword(s):  
Materials Science ◽  
Polymer Materials

Hierarchically Structured Conjugated Polymers

2009 ◽  
Vol 1236 ◽  
Author(s):  
Holger Frauenrath
Keyword(s):  
Conjugated Polymers ◽  
Materials Science ◽  
Electronic Materials ◽  
Hierarchical Structures ◽  
Science Research ◽  
Building Blocks ◽  
Polymer Materials ◽  
Molecular Precursors ◽  
Quaternary Structures ◽  
Uniform Diameter

AbstractFunctional carbonaceous materials, organic electronic materials, and polymer materials which "speak the language" of biomaterials in their propensity for hierarchical structure formation play a central role in current materials science research. In this context, we prepared hierarchically structured conjugated polymers from diacetylene macromonomers based on β-sheet-forming oligopeptide-polymer conjugates as supramolecular building blocks. The monomers gave rise to supramolecular polymers with a finite number of strands, a uniform diameter of a few nanometers, and defined superstructures. These were then converted into conjugated polymers under retention of their hierarchical structures, leading to poly(diacetylene)s with multiple-helical quaternary structures and a rich folding behavior. The diacetylene macromonomers served as a model system to improve our understanding of how to use hydrogen-bonding sites in order to control the placement of reactive molecular precursors for hierarchically structured organic materials.

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