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Isothermal Crystallization Kinetics and Morphology of Polypropylenes and Propylene/ethylene (p/e) Copolymers
| Content Provider | Semantic Scholar |
|---|---|
| Author | Stephens, Catherine H. Poon, Benny Kamdar, Apur R. Chum, S. P. Ansems, Patricia Swogger, Kurt W. Hiltner, Anne Baer, Erich |
| Copyright Year | 2004 |
| Abstract | The bulk isothermal crystallization kinetics and spherulite growth rate of a (1) metallocene polypropylene (m-PP) and metallocene propylene/ethylene copolymers (m-P/Es), (2) Ziegler-Natta polypropylene (ZN-PP) and Ziegler-Natta propylene/ethylene copolymers (ZN-P/Es), and (3) a new (n-PP) polypropylene and Development Performance Plastomers (DPPs) were studied. Crystallization half time (t 1 /2) and spherulite growth rate (G) as a function of melt crystallization temperature were analyzed for the three homopolymers and their corresponding copolymers containing 4, 8, and 13 mole % ethylene, respectively. With increasing ethylene content, all three polymer systems exhibited increased t 1 /2 and decreased G. At low comonomer contents, n-PP and DPPs exhibited slower t 1 / 2 s and Gs, however at high comonomer contents, m-PPs exhibited slower kinetic behavior. |
| Starting Page | 2591 |
| Ending Page | 2595 |
| Page Count | 5 |
| File Format | PDF HTM / HTML |
| Volume Number | 2 |
| Alternate Webpage(s) | http://msdssearch.dow.com/PublishedLiteratureDOWCOM/dh_004d/0901b8038004d4bd.pdf?filepath=versify/pdfs/noreg/746-03501.pdf&fromPage=GetDoc |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
