Isotactic polypropylene/hydrogenated oligocyclopentadiene blends: influence of annealing on crystal and phase structures

The influence of annealing on phase structure and morphology of isothermally crystallized samples of isotactic polypropylene/hydrogenated oligocyclopentadiene (iPP/HOCP) blends was investigated by using wide- and small-angle X-ray scattering methods and differential scanning calorimetry. The two com...

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Bibliographic Details
Published in:Polymer (Guilford) 1991-01, Vol.32 (4), p.641-647
Main Authors: Martuscelli, E., Canetti, M., Bonfatti, A.M., Seves, A.
Format: Article
Language:English
Subjects:
annealing
Applied sciences
blends
crystal structure
Crystallization
Exact sciences and technology
hydrogenated oligocyclopentadiene
isotactic polypropylene
Organic polymers
phase structure
Physicochemistry of polymers
Properties and characterization
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Summary:The influence of annealing on phase structure and morphology of isothermally crystallized samples of isotactic polypropylene/hydrogenated oligocyclopentadiene (iPP/HOCP) blends was investigated by using wide- and small-angle X-ray scattering methods and differential scanning calorimetry. The two components are melt-compatible; moreover during crystallization of iPP the molecules of HOCP are mainly ejected in interlamellar regions where they form a homogeneous phase with uncrystallized iPP molecules or part of them. It was found that the presence of such molecules in interlamellar regions determines a loss of thickening tendency of crystalline lamellae following the annealing. The amount of this effect is dependent on composition and undercooling.
ISSN:0032-3861
1873-2291
DOI:10.1016/0032-3861(91)90476-Y