Effects of peroxide on molecular weight and rheological properties of polypropylene resins /
Peroxide levels used in the production of controlled rheology polypropylene (CRPP) resins were related to their material properties as determined by quality control techniques, fiber spinning processability, and parameters and functions obtained from Theological measurements and modeling. The Theolo...
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| Format: | Thesis Book |
| Language: | English |
| Published: |
[Place of publication not identified] :
[publisher not identified] ;
1996.
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| Subjects: | |
| Online Access: | http://proxy.library.tamu.edu/login?url=http://proquest.umi.com/pqdweb?did=739641031&sid=1&Fmt=2&clientId=2945&RQT=309&VName=PQD |
| Summary: | Peroxide levels used in the production of controlled rheology polypropylene (CRPP) resins were related to their material properties as determined by quality control techniques, fiber spinning processability, and parameters and functions obtained from Theological measurements and modeling. The Theological measurements included oscillatory behavior, relaxation modulus, steady shear behavior, creep and recovery compliance and capillary flow. The resin properties determined by quality control (QC) techniques were melt flow index (MFI), percentage solubles (SP), molecular weight distribution (MWD), peroxide concentration (PC). Processability was determined by measuring the maximum velocity at which the resin can be formed into fibers before breaking . The Theological measurements were used to generate material functions that were compared to predictions from the Wagner constitutive model and to fiber spinning processability data. The Wagner model was also used to estimate Theological properties other than the ones measured in this study. |
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| Item Description: | Vita. "Major Subject: Interdisciplinary Engineering". |
| Physical Description: | volumes : illustrations ; 28 cm. Issued also on microfiche from University Microfilms Inc. |
| Bibliography: | Includes bibliographical references: pages 261-265. |