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| Titel: |
A SEGREGATION APPROACH TO MOLECULAR WEIGHT CONTROL IN CONTROLLED DEGRADATION OF POLYMERS |
| Auteur: |
Huang, Jan-Chan |
| Verschenen in: |
International journal of polymeric materials |
| Paginering: | Jaargang 51 (2002) nr. 9 pagina's 841-850 |
| Jaar: |
2002-09 |
| Inhoud: |
In a reactive extrusion process a new approach - degrading only a portion of the input followed by a mixing process with unreacted portion - has been proposed as a method to control the molecular weight and molecular weight distribution (MWD). The number average molecular weight, M n , and the weight average molecular weight, M w , are studied through the Schulz-Zimm molecular weight distribution. The results indicate that M n , and M w can be regulated separately during degradation. M w and the polydispersity index (PDI) of a segregated degradation process are higher than the corresponding results of a uniform system. In the later stage of a segregated degradation the PDI can be higher than that of the original polymers. Starting from a narrow unimodal MWD it is possible to produce a bimodal MWD. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 1 van 45 gevonden artikelen
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