On the effective conductivity and the apparent viscosity of a thin rough polymer interface using PGD‐based separated representations

Amine Ammar; Chady Ghnatios; Frank Delplace; Anais Barasinski; Jean‐Louis Duval; Elías Cueto; Francisco Chinesta

doi:10.1002/nme.6448

On the effective conductivity and the apparent viscosity of a thin rough polymer interface using PGD‐based separated representations

International Journal for Numerical Methods in Engineering ◽

10.1002/nme.6448 ◽

2020 ◽

Vol 121 (23) ◽

pp. 5256-5274 ◽

Cited By ~ 2

Author(s):

Amine Ammar ◽

Chady Ghnatios ◽

Frank Delplace ◽

Anais Barasinski ◽

Jean‐Louis Duval ◽

...

Keyword(s):

Apparent Viscosity ◽

Effective Conductivity ◽

Polymer Interface ◽

Separated Representations

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Surface Modification of Poly (alkyl/Arylphosphazene) Thin Films

MRS Proceedings ◽

10.1557/proc-629-ff9.5 ◽

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.

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

MRS Proceedings ◽

10.1557/proc-629-ff2.2 ◽

2000 ◽

Vol 629 ◽

Cited By ~ 1

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.

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