The effect of silica on the crystallization of isotactic poly(propylene oxide)
β Scribed by M. A. Kennedy; G. R. Brown; L. E. St-pierre
- Publisher
- Society for Plastic Engineers
- Year
- 1984
- Tongue
- English
- Weight
- 535 KB
- Volume
- 5
- Category
- Article
- ISSN
- 0272-8397
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π SIMILAR VOLUMES
## Abstract The effect of added silica on the spherulite radial growth rates of isotactic poly(propylene oxide) (iβPPrO) has been investigated by optical photomicroscopy. Two different iβPPrO samples were used of different molecular weights and isotacticity, 87 and 100% as determined by ^13^C NMR.
## Abstract Changes in phase composition and chain mobility in injectionβmolded isotactic poly(propylene), crystallized from the melt with slow cooling rate and subsequently quenched, associated with aging at temperature well above __T__~g~ for 150 and 1 000 h, are studied using timeβdomain ^1^H so
The degree of crystallinity of a set of monoclinic (alpha) isotactic poly(propylenes), prepared by a metallocene-type catalyst, were determined at room temperature. Three different methods were used: density, enthalpy of fusion, and wide-angle X-ray scattering, and the results compared. The relation