Polymethylmethacrylate capillaries

Soper, S.A., Ford, S.M., Xu, Y.C., Qi, S.Z., McWhorter, S., Lassiter, S., Patterson, D., Bmch, R.C., Nanoliter-scale sample preparation methods directly coupled to polymethylmethacrylate-based microchips and gel-filled capillaries for the analysis of oligonucleotides.. /. Chromatogr. A 1999, 853, 107-120. 

In Fig. 24d, the isothermal log k[ versus density curves for the dodecamers of polystyrene (PS), polymethylmethacrylate (PMMA), and polyethyleneglycol (PEG) 8LS well as tetracosane (as the dodecamer of ethylene) are compared the measurements were made in a capillary column with superbonded polyoctylsilox-ane as a stationary phase at 371 K (for details see [60]). The measurements demonstrate that the dodecamer of PS is the lea.st soluble oligomer, and that of PEG the best. The curves for tetracosane and PMMA, however, intersect giving evidence of the fact that no separation is possible at mobile phase densities near 0.7 g cm . ... 

Edkins and co-workers [34] have described a direct capillary GC method to monitor residual methylmethacrylate in polymethylmethacrylate. A short (5 m) crosslinked methyl silicone fused-silica capillary column with flame ionisation detection gave good separation efficiency and parts per million detection limits. Capillary gas-liquid chromatography was superior to packed column analysis (SP 1000) in terms of both analytical utility and ease of use. 

Fig. 13.1 Polymers used for medical devices for dialysis and peritoneal dialysis. Polyurethane (PUR) is applied as potting material for capillary membranes, silicone tings guarantee a leak-age-free system, polycarbonate and polypropylene are used for casings, and a series of polymers are incorporated as membrane materials (P5M-polysulfone, P S-polyether-sulfone, PA-polyamide, PAAf-polyacrylonitrile, PMMA-polymethylmethacrylate, CIA-cellulose-tri-acetate). PUC-polyvinylchloride as a biomaterial for tubing needs plasticizers for its flexibility, such as D 7/P/DOP-di-ethyl-hexylphthalate/di-octyl-phthalate, TOTM-tn-octyl trimeUitate, DWCif-di-isononyl-cyclohexane...

Capillary membranes (microporous hollow fibers) are an integral part of artificial lungs and kidneys. They represent extracorporeal applications where both the fibers and the textile structure are in direct contact with biood. For hemodialysis, mainly fibers made from cellulose, polysulfone, polymethylmethacrylate, and polyacrylonitrile are used. In oxygenators, mainly microporous hollow fibers made from polymethylpentene and silicone are used. Microporous hollow fibers can be... 

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