Supercritical CO₂ welding of laminated linear low density polyethylene films

Abstract

Supercritical carbon dioxide (SC CO2) is used as a reversible plasticizing agent to promote solvent welding in highly oriented LLDPE films. These films are laid up in a quasi‐Isotropic fashion to enhance material properties in all directions. It is shown tht, after processing, the oriented morphology and crystallinity are effectively unchanged. These laminated films are investigated both physically and mechanically. The mechanical strength of laminate interfaces is tested using a T‐Peel test. Tensile properties of the laminated film are evaluated and compared to the single oriented plies. Tear resistance is measured using a single specimen J1C.

Preparation of polymer–clay nanocomposites and their properties

“…The detailed experiments can be found in Caskey and Lesser. 215 The authors reported a homogeneous morphology, which was aided by sc-CO 2 , in the intercalated nanocomposites containing as high as 40 wt% of OMLS. At this loading, only a 50% increase in modulus was observed.…”

Solubility, swelling degree and crystallinity of carbon dioxide–polypropylene system

“…Polymers, such as polyethylene (PE), can be reversibly plasticized with CO 2 to promote solvent welding for producing laminated linear low-density polyethylene films [3]. In polymer processing, CO 2 is being used as a physical blowing agent in which microcellular foams can be formed that have fine characteristics (cell sizes < 10 m) that provides high performance products [1].…”

In situ polymerization and nano‐templating phenomenon in nylon fiber/PMMA composite laminates

“…The details of this experimental apparatus have been discussed elsewhere, 13 but for thoroughness, the main points will be reiterated here. The mold is mounted in a PHI 40,000 lb hydraulic press.…”