Search Results
Abstract
This biomaterials overview for selecting polymers for medical devices focuses on polymer materials, properties and performance. An improved understanding of thermoplastics and thermoset properties is accomplished by thermal analysis for device applications. The medical applications and requirements as well as the oxidative and mechanical stability of currently used polymers in devices are discussed. The tools used to aid the ranking of the thermoplastics and thermosets are differential scanning calorimetry (DSC), thermogravimetry (TG), thermal mechanical analysis (TMA) and dynamic mechanical analysis (DMA) as well as a number of key ASTM polymer tests. This paper will spotlight the thermal and mechanical characterization of the bio-compatible polymers e.g., olefins, nylon, polyacetals, polyvinyl chloride and polyesters.
soluble in nonionic polar solvents, such as N , N -dimethylacetamide, DMA, dimethylsulfoxide, DMSO, etc., [ 1 , 2 ]. Aromatic polyamides having good solubility are industrially important, because of their ease of fabrication. Many aromatic polyamides
Treatment of water-induced curvature of the DSC heat flow rate signal
Applied to fractionated nucleation of polypropylene dispersed in water
“waterborne polypropylene dispersion” —, used here. Several other examples can be found in literature, e.g. [ 6 , 26 – 29 ]. Examples of polymer–water systems which can be in a mixed or demixed state depending on temperature and time are polyamide
“jewel barberry”. Ten grams of samples were packed in polyamide film. The drying time of the sun method was 336 h, until the desired humidity 18–20% was reached. The outside temperatures were minimum 0 ± 2 °C and maximum 25 ± 2 °C during 24 h ( Ahmadi
, in recent years, significant attention has been devoted to the sintering behavior of high performance, engineering thermoplastics, such as polyamides, polyesters, aromatic polychetones, polycarbonate, and their nanocomposites, with a particular
Abstract
Complexation aided ultrafiltration (CAUF) is an attractive separation process for the removal of trace toxic elements from effluents at low pressures. Freshly prepared polysulfone, polyamide, polyamide hydrazide and polyvinyl butyral blended cellulose acetate membranes are studied with respect to the separation behavior for radioactive cerium tracer in the presence of polyethyleneimine. The effect of polymer loading and pH of the feed system are investigated.
