Structure-properties relationships in some random copolymers of propylene
✍ Scribed by G.P. Guidetti; Patrizia Busi; I. Giulianelli; R. Zannetti
- Publisher
- Elsevier Science
- Year
- 1983
- Tongue
- English
- Weight
- 179 KB
- Volume
- 19
- Category
- Article
- ISSN
- 0014-3057
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✦ Synopsis
Correlations have been investigated between the content of short isotactic segments and thermal properties in some propylene/olefin random copolymers. Polypropylene copolymers modified by ethylene show variations different from those for copolymers modified by ethylene and butene. However, in both cases, the weldability temperature decreases on increasing the comonomer concentration.
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## Abstract A spherical TiCl~4~/MgCl~2~‐based catalyst was used in the synthesis of __in situ__ isotactic polypropylene/ethylene–propylene random copolymer blends by propylene bulk polymerization and subsequent gas‐phase copolymerization of ethylene with propylene. Different copolymerization condit