Polymer Property for Extruded Foaming Process.

Foaming and foam stability for mixed polymer-surfactant solutions: effects of surfactant type and polymer charge.

Solutions of surfactant-polymer mixtures often exhibit different foaming properties, compared to the solutions of the individual components, due to the strong tendency for formation of polymer-surfactant complexes in the bulk and on the surface of the mixed solutions. A generally shared view in the literature is that electrostatic interactions govern the formation of these complexes, for exampl...

An arbitrary Lagrangian-Eulerian method for simulating bubble growth in polymer foaming

We present a sharp-interface algorithm for simulating the diffusion-driven bubble growth in polymer foaming. A moving mesh of unstructured triangular elements tracks the expanding and deforming bubble surface. In the interior of the liquid, the mesh velocity is determined by solving a Laplace equation to ensure spatially smooth mesh movement. When mesh distortion becomes severe, remeshing and i...

Novel Thin Film Polymer Foaming Technique for Low and Ultra Low-k Dielectrics

As minimum device dimensions continue to shrink and on-chip device densities grow, signal distortion caused by capacitive coupling and crosstalk between the interconnections will increase. The current insulator material for on-chip applications is silicon dioxide (k= 3.9 4.2). The next generations of microchips require interlayer dielectrics with dielectric constants below 2.2 [I, 21. Although ...

Well-ordered polymer nano-fibers with self-cleaning property by disturbing crystallization process

Bionic self-cleaning surfaces with well-ordered polymer nano-fibers are firstly fabricated by disturbing crystallization during one-step coating-curing process. Orderly thin (100 nm) and long (5-10 μm) polymer nano-fibers with a certain direction are fabricated by external macroscopic force (F blow) interference introduced by H2 gas flow, leading to superior superhydrophobicity with a water con...

Structure-property Evolution During Polymer Crystallization