Lateral Mobility of Single Chains at a Liquid Polymer Interface

2008 ◽  
Vol 41 (20) ◽  
pp. 7284-7286 ◽  
Author(s):  
Jingfa Yang ◽  
Jiang Zhao ◽  
Charles C. Han
Keyword(s):  
Lateral Mobility ◽  
Liquid Polymer ◽  
Polymer Interface

scholarly journals Complete inclusion of bioactive molecules and particles in polydimethylsiloxane: a straightforward process under mild conditions

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Greta Faccio ◽  
Alice Cont ◽  
Erik Mailand ◽  
Elaheh Zare-Eelanjegh ◽  
Riccardo Innocenti Malini ◽  
...  
Keyword(s):  
Biochemical Properties ◽  
Bioactive Molecules ◽  
Curing Process ◽  
Simple Process ◽  
Liquid Polymer ◽  
Mild Conditions ◽  
Polymer Interface ◽  
Activity Measurements ◽  
Biological Entities ◽  
External Stimuli

AbstractBy applying a slow curing process, we show that biomolecules can be incorporated via a simple process as liquid stable phases inside a polydimethylsiloxane (PDMS) matrix. The process is carried out under mild conditions with regards to temperature, pH and relative humidity, and is thus suitable for application to biological entities. Fluorescence and enzymatic activity measurements show that the biochemical properties of the proteins and enzyme tested are preserved, without loss due to adsorption at the liquid-polymer interface. Protected from external stimuli by the PDMS matrix, these soft liquid composite materials are new tools of interest for robotics, microfluidics, diagnostics and chemical microreactors.

Surface Modification of Poly (alkyl/Arylphosphazene) Thin Films

2000 ◽  
Vol 629 ◽  
Author(s):  
John V. St. John ◽  
Patty Wisian-Neilson
Keyword(s):  
Thin Films ◽  
Surface Modification ◽  
Chemical Resistance ◽  
Chemical Properties ◽  
Inorganic Polymers ◽  
Thin Polymer Films ◽  
Hydrophilic Interactions ◽  
Carboxylic Acid Groups ◽  
Polymer Interface ◽  
Thin Polymer

ABSTRACTPoly (methylphenylphosphazene) (PMPP) is an example of a unique class of inorganic polymers with alternating – (P=N)– backbones. Chemical modification of bulk PMPP can result in changes of physical properties such as chemical resistance, onset temperature of thermal degradation, elasticity, and flexibility. Surface modification of PMPP allows tailoring of the chemical properties at the polymer interface while maintaining the integrity of the bulk polymer. In this research, PMPP thin films were treated to form carboxylate or carboxylic acid groups at the surface. Surface modification was monitored by following changes in contact angle. The hydrophobic/hydrophilic interactions of carboxylated PMPP surfaces allow for mesoscale interactions of thin polymer films.

The Reactive Formation of Diblock Copolymer at a Polymer/Polymer Interface and its Effect on Interfacial Structure

2000 ◽  
Vol 629 ◽  
Author(s):  
Jonathan S. Schulze ◽  
Timothy P. Lodge ◽  
Christopher W. Macosko
Keyword(s):  
Molecular Weight ◽  
Interfacial Structure ◽  
Root Mean Square Roughness ◽  
Radius Of Gyration ◽  
Interfacial Region ◽  
Force Microscopy ◽  
Amino Terminal ◽  
Polymer Interface ◽  
Atomic Force ◽  
Time Required

ABSTRACTThe reaction of perdeuterated amino-terminal polystyrene (dPS-NH2) with anhydrideterminal poly(methyl methacrylate) (PMMA-anh) at a PS/PMMA interface has been observed with forward recoil spectrometry (FRES). Bilayer samples were constructed by placing thin films of PS containing ∼8.5 wt % dPS-NH2 on a PMMA-anh layer. Significant reaction was observed only after annealing the samples at 174°C for several hours, a time scale at least two orders of magnitude greater than the time required for the dPS-NH2 chains to diffuse through the bulk PS layer. The topography of the interfacial region as copolymer formed was measured using atomic force microscopy (AFM). Roughening of the PS/PMMA interface was observed to varying degrees in all annealed samples. Furthermore, the extent of this roughening was found to depend on the PS matrix molecular weight. Reaction in the samples with a high molecular weight PS matrix resulted in a root mean square roughness approximately equal to the radius of gyration Rg of the copolymer. However, approximately twice as much roughening was observed in the low molecular weight PS matrix. This study reveals how the molecular weight of one of the phases can affect the rate of reaction at a polymer/polymer interface.

Chemical Characterization of Metal/Polymer interface

2015 ◽  
Vol 84 (8) ◽  
pp. 591-595 ◽  
Author(s):  
Yukiko IZUMI ◽  
Naoki BADEN ◽  
Kazuhiro MATSUDA
Keyword(s):  
Chemical Characterization ◽  
Polymer Interface ◽  
Metal Polymer

Probing the metal/conducting polymer interface and implications of the metal diffusion in two-terminal sandwich devices

2021 ◽  
Vol 278 ◽  
pp. 116797
Author(s):  
Nidhi Yadav ◽  
Nikita Kumari ◽  
Yoshito Ando ◽  
Shyam S. Pandey ◽  
Vipul Singh
Keyword(s):  
Conducting Polymer ◽  
Polymer Interface ◽  
Metal Diffusion

scholarly journals Protease priming of neutrophil superoxide production. Effects on membrane lipid order and lateral mobility.

1991 ◽  
Vol 266 (25) ◽  
pp. 16465-16471
Author(s):  
D.J. Kusner ◽  
J.N. Aucott ◽  
D. Franceschi ◽  
M.M. Sarasua ◽  
P.J. Spagnuolo ◽  
...  
Keyword(s):  
Membrane Lipid ◽  
Superoxide Production ◽  
Lateral Mobility ◽  
Lipid Order ◽  
Neutrophil Superoxide ◽  
Production Effects

scholarly journals The effects of morphological variation and polymer/polymer interface on the tensile modulus of binary polymer blends: a modeling approach

2020 ◽  
Vol 41 (2) ◽  
pp. 109-118
Author(s):  
Esmail Sharifzadeh ◽  
Yasahr Amiri
Keyword(s):  
Polymer Blends ◽  
Morphological Variation ◽  
Tensile Modulus ◽  
Network System ◽  
Test Results ◽  
Model Accuracy ◽  
Acceptable Accuracy ◽  
Polymer Interface ◽  
Binary Polymer ◽  
Neural Network System

Abstract In this work, the effects of the morphological variation and the polymer/polymer interface on the tensile modulus of binary polymer blends were evaluated using a combined modeling method. The characteristics of the polymer/polymer interface region were evaluated using a neural network system and the results were used to improve the analytical model. The model accuracy was investigated by comparing its predictions with the tensile test results of some prepared iPP/PA blend samples and also some other data from literature which revealed an acceptable accuracy (error < 5%).

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