in the polypropylene (see Figure 2) â¢ Pellet form â allows continuous compounding and bulk handling of the elastomer Figure 1: Low Temperature Ductility of Various Ethylene/Alpha-Olefin Elastomers(1)-65-60-55-50-45-40-35 Glass Transition Temperature (Â°C) Propylene Butene 0 5 10 15 20 25 Crystallinity (%) Octene Figure 2: Elastomer Dispersion in TPO(1)
Superior vena cava syndrome is most often caused by compression of the vein (the superior vena cava), that returns blood from the upper body back to the right atrium of the heart by tumor. Symptoms include swelling of the face and arms associated with shortness of breath.
Blood clot (thrombus) formation that causes superior vena cava syndrome is a complication of pacemaker wires,dialysis, and other intravenous catheters that are threaded into the superior vena cava. Historically, and in other parts of the world, infection (syphilis and tuberculosis) is another cause of superior vena cava syndrome.