ISSN:
0021-8995
Schlagwort(e):
Chemistry
;
Polymer and Materials Science
Quelle:
Wiley InterScience Backfile Collection 1832-2000
Thema:
Chemie und Pharmazie
,
Maschinenbau
,
Physik
Notizen:
The reaction of EPR with dicumyl peroxide at 180°C or t-butyl perbenzoate at 140°C resulted in the formation of a fraction insoluble in cyclohexane at 22°C. The presence of maleic anhydride (MAH) in the EPR-peroxide reaction mixture increased the amount of insoluble polymer, whose concentration decreased as the peroxide concentration increased. The [η] of the cyclohexane-soluble polymer decreased and the MAH content increased as the peroxide concentration increased at constant MAH concentration. The [η] and the MAH content of the soluble polymer increased as the MAH concentration increased at constant peroxide concentration. The EPR-peroxide and EPR-MAH-peroxide reaction products were soluble in refluxing xylene and could be fractionated by precipitation with acetone. The presence of stearamide in the EPR-MAH-peroxide reaction mixture decreased the amount of cyclohexane-insoluble polymer, indicative of decreased cross-linking, but the [η] of the soluble EPR-g-MAH increased, indicative of decreased degradation, analogous to the effect of stearamide in the MAH-peroxide reactions with LDPE and PP, respectively.
Zusätzliches Material:
8 Tab.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1002/app.1987.070330722
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