The characteristics of stabilization of polyolefins by isocyanates

Characteristics of Structural Organisation of Crystalline Polyolefins Modified with Small Amounts of Epoxy Compounds

“…Further increase in the content of modifiers leads to a substantial worsening of properties, which is associated with the formation, bearing in mind the small number of unsaturated bonds in polyolefins, of microheterogeneous inclusions of a polar nature that are not bound to the polymer, and which lead to impairment of compatibility in the system (Ref. 6). There has been allround improvement of the strength, rheological and stability characteristics of polyolefins, with best results being achieved with small additions of modifying agents (less than 1 wt.%).…”

“…The interference pattern observed during specimen loading is due to the greater orientation of the macromolecules (Figure 4). 6. The nature and degree of orientation in the crystalline and amorphous phases can be evaluated using IR spectroscopy, from the intensities of the absorption bands at 809 and 841 cm -1 (Refs.…”