ISSN:
0032-3888
Schlagwort(e):
Chemistry
;
Chemical Engineering
Quelle:
Wiley InterScience Backfile Collection 1832-2000
Thema:
Chemie und Pharmazie
,
Maschinenbau
,
Physik
Notizen:
Ternary phase diagram for several polybutene-1 and polystyrene resins in carbon tetrachloride have been determined. These show: Almost the entire phase diagram is a two-phase region.The composition of each phase is mainly of one polymer type.Increasing the molecular weight of either polymer diminishes compatibility.To our knowledge, this is the first example of phase separation in common solvent polymer solutions that involves a poly α-olefin. Viscosity and surface tension data on the equilibrium phases indicate the phases have the same surface tensions but far different viscosities. The upper phase is mainly polybutene-1 and is much more viscous than the lower phase which is mainly polystyrene. Slight agitation of the phases gives an “emulsion” that may be cast into a polymer film. The film has a continuous phase of Form III polybutene-1 and a dispersed phase of polystyrene. The polystyrene may be extracted from the film by immersion in methyl ethyl ketone to give a porous polybutene-1 film.
Zusätzliches Material:
2 Ill.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1002/pen.760141204
