NOTE: This item is not available outside the Texas A&M University network. Texas A&M affiliated users who are off campus can access the item through NetID and password authentication or by using TAMU VPN. Non-affiliated individuals should request a copy through their local library's interlibrary loan service.
Impact fracture behavior of model system modified polypropylene
| dc.creator | Estrada, Albert Jesse | |
| dc.date.accessioned | 2012-06-07T22:59:07Z | |
| dc.date.available | 2012-06-07T22:59:07Z | |
| dc.date.created | 2000 | |
| dc.date.issued | 2000 | |
| dc.identifier.uri | https://hdl.handle.net/1969.1/ETD-TAMU-2000-THESIS-E895 | |
| dc.description | Due to the character of the original source materials and the nature of batch digitization, quality control issues may be present in this document. Please report any quality issues you encounter to digital@library.tamu.edu, referencing the URI of the item. | en |
| dc.description | Includes bibliographical references (leaves 105-109). | en |
| dc.description | Issued also on microfiche from Lange Micrographics. | en |
| dc.description.abstract | The morphology and impact properties of polypropylene copolymer blends modified with talc and/or ethylene-propylene (EPR) or ethylene-octene (EOR) rubber were studied. Izod impact, instrumented Charpy impact, and high speed single-edge-notched three-point-bend tests were performed to obtain the values of fracture toughness. A correlation exists between the Izod impact values and the size of the damage zone after fracture. Damage analysis using the double-notch four-point-bend Charpy impact test was performed and the specific damage mechanisms that occurred during fracture were identified. The impact strength is greatly increased with the addition of EPR and EOR rubber. The specific fracture mechanisms for the rubber toughened blends include rubber particle cavitation, crazing, and shear yielding. A further increase in impact strength, with an additional increase in stiffness upon addition of talc is also found. The additional filler particle-matrix debonding dilatational mechanism is believed to provide another means to relieve the triaxial stress state ahead of the crack tip and facilitate additional shear yielding. Attempts to determine morphology differences between the EOR and EPR blends through the use of transmission electron microscopy and scanning electron microscopy were made. | en |
| dc.format.medium | electronic | en |
| dc.format.mimetype | application/pdf | |
| dc.language.iso | en_US | |
| dc.publisher | Texas A&M University | |
| dc.rights | This thesis was part of a retrospective digitization project authorized by the Texas A&M University Libraries in 2008. Copyright remains vested with the author(s). It is the user's responsibility to secure permission from the copyright holder(s) for re-use of the work beyond the provision of Fair Use. | en |
| dc.subject | mechanical engineering. | en |
| dc.subject | Major mechanical engineering. | en |
| dc.title | Impact fracture behavior of model system modified polypropylene | en |
| dc.type | Thesis | en |
| thesis.degree.discipline | mechanical engineering | en |
| thesis.degree.name | M.S. | en |
| thesis.degree.level | Masters | en |
| dc.type.genre | thesis | en |
| dc.type.material | text | en |
| dc.format.digitalOrigin | reformatted digital | en |
Files in this item
This item appears in the following Collection(s)
-
Digitized Theses and Dissertations (1922–2004)
Texas A&M University Theses and Dissertations (1922–2004)
Request Open Access
This item and its contents are restricted. If this is your thesis or dissertation, you can make it open-access. This will allow all visitors to view the contents of the thesis.