Apparatus for the Observation of Infrared Streaming Dichroism of Polymer Solutions

Autor:	G. R. Bird, E. R. Blout, Maxfield Parrish
Rok vydání:	1958
Předmět:	chemistry.chemical_classification Materials science business.industry Infrared Hypodermic Syringes Polymer Dichroism Molecular physics Constant rate Optics chemistry Liquid cell business Instrumentation Macromolecule
Zdroj:	Review of Scientific Instruments. 29:305-309
ISSN:	1089-7623 0034-6748
DOI:	10.1063/1.1716182
Popis:	A method and apparatus have been developed for the quantitative observation of infrared streaming dichroism of solutions of macromolecules. The design, construction, and operation of the apparatus are described in detail. The apparatus consists of a modified standard infrared liquid cell through which the solution is pumped by means of a pair of hypodermic syringes which are driven in opposition by a pair of cams that provide a constant rate of displacement. The resulting flow is constant except for a reversal in direction at the end of each stroke. The maximum value of the gradient in the cell may be calculated by means of a simple formula. The total volume of the pump and cell is 2.2 cc so that small samples may be measured. Several types of materials have been measured and a typical result is shown.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::ac22ba5b1b74757590afe160420143d4 https://doi.org/10.1063/1.1716182 Zobrazit plný text záznamu