The manufacture of EPDM with consistent polymer and compound rheology (Record no. 70837)
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| 000 -LEADER | |
|---|---|
| fixed length control field | 02018nam a2200217Ia 4500 |
| 100 ## - MAIN ENTRY--AUTHOR NAME | |
| Personal name | Wortman W A |
| 245 #4 - TITLE STATEMENT | |
| Title | The manufacture of EPDM with consistent polymer and compound rheology |
| 260 ## - PUBLICATION, DISTRIBUTION, ETC. (IMPRINT) | |
| Name of publisher | Abstracts of Meeting Papers: 155th Meeting (Spring 99) of the Rubber Division American Chemical Society Chicago, Illinois April 13-16, 1999. p781 |
| 500 ## - GENERAL NOTE | |
| General note | Source Year: 1999 |
| 520 ## - SUMMARY, ETC. | |
| Summary, etc | Ethylene-propylene-diene rubber (EPDM) grades are becoming increasingly more sophisticated in terms of polymer microstructure. As a result, more sophisticated quality assurance tests, such as gel permeation chromatography (GPC), Mooney stress relaxation (MSR) and dynamic mechanical testing (DMT) are required to insure consistent polymer rheology. These tests were historically restricted to research settings. The role of these tests in the production setting is presented. Three polymers of equivalent Mooney viscosity that vary in terms of branching were characterised to demonstrate the sensitivity of the tests to structure. Then, a series of 12 consecutive production lots of EPDM were characterized by the same tests. The samples were also compounded in an ASTM type recipe. Both compound processability and cure properties were evaluated. Cured compound samples were tested for carbon black dispersion. Rheology of the raw polymer samples is compared to the ultimate compound rheology. Vanadium based catalysts systems are shown to be capable of producing EPDM with very consistent lot to lot polymer rheology. MSR and DMT can provide valuable information related to polymer microstructure, and along with GPC, can play an important role in quality control and quality assurance of EPDM production. |
| 650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical Term | Compound rheology |
| 650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical Term | Consistent polymer |
| 650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical Term | EPDM |
| 650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical Term | Gel permeation chromatography |
| 650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical Term | Mooney stress relaxation |
| 700 ## - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Beardsley K P |
| 700 ## - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Caldwell J D |
| 856 ## - ELECTRONIC LOCATION AND ACCESS | |
| Uniform Resource Identifier | RC&T |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) | |
| Koha item type | Journals |
| Withdrawn status | Lost status | Damaged status | Not for loan | Home library | Current library | Shelving location | Date acquired | Koha item type |
|---|---|---|---|---|---|---|---|---|
| Journals | RRII Library | RRII Library | Rubber chemistry | 17/12/2021 | Journals |