Rubber modified vinyl ester resins of different molecular weights.
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| Title: | Rubber modified vinyl ester resins of different molecular weights. |
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| Authors: | Auad, M. L.1, Proia, M.1, Borrajo, J.1, Aranguren, M. I.1 marangur@fi.mdp.edu.ar |
| Source: | Journal of Materials Science. Oct2002, Vol. 37 Issue 19, p4117-4126. 10p. |
| Subjects: | Rubber additives, Molecular weights, Styrene, Epoxy resins, Gums & resins, Rubber coatings, Phase separation method (Engineering), Polyesters |
| Abstract: | The morphology, as well as the related fracture and mechanical behavior of vinyl ester resins (DVER) of different molecular weights cured with styrene (S) and modified with two different liquid rubbers are presented and discussed. The liquid rubbers are: carboxyl terminated poly(butadiene- co-acrylonitrile) (CTBN), a common toughening agent for epoxy resins, and an almost unreactive rubber with the DVER and S comonomers, and a reactive rubber (vinyl terminated poly(butadiene- co-acrylonitrile), (VTBN). The initial miscibility of the modified systems and the reactivity of the rubber determine the final morphology of the material. This morphology will correspond to a continuous main phase (rich in the DVER-S copolymer) with simple rubber rich inclusions (as in the epoxy-rubber systems) or with inclusions with a complex internal structure, where phase separation occurs as in the low profile modified unsaturated polyester resins. The morphologies developed are strongly dependent on the resin molecular weight as well as on the elastomer added. In spite of the initially higher compatibility of the S-DVER-CTBN system with respect to the S-DVER-VTBN system, the reactivity of the vinyl-ended elastomer leads to a much finer distribution of the elastomeric phase. In particular, the low molecular weight resin cured with S and modified with 10% of CTBN leads to a cocontinuous structure with microvoids that generates a material of low density and poor mechanical and fracture properties. On the other hand, the use of VTBN as additive leads to a more compact morphology, with gradual reduction of the mechanical performance of the modified resins and improved fracture behavior. [ABSTRACT FROM AUTHOR] |
| Copyright of Journal of Materials Science is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
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| Items | – Name: Title Label: Title Group: Ti Data: Rubber modified vinyl ester resins of different molecular weights. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Auad%2C+M%2E+L%2E%22">Auad, M. L.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Proia%2C+M%2E%22">Proia, M.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Borrajo%2C+J%2E%22">Borrajo, J.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Aranguren%2C+M%2E+I%2E%22">Aranguren, M. I.</searchLink><relatesTo>1</relatesTo><i> marangur@fi.mdp.edu.ar</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Journal+of+Materials+Science%22">Journal of Materials Science</searchLink>. Oct2002, Vol. 37 Issue 19, p4117-4126. 10p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Rubber+additives%22">Rubber additives</searchLink><br /><searchLink fieldCode="DE" term="%22Molecular+weights%22">Molecular weights</searchLink><br /><searchLink fieldCode="DE" term="%22Styrene%22">Styrene</searchLink><br /><searchLink fieldCode="DE" term="%22Epoxy+resins%22">Epoxy resins</searchLink><br /><searchLink fieldCode="DE" term="%22Gums+%26+resins%22">Gums & resins</searchLink><br /><searchLink fieldCode="DE" term="%22Rubber+coatings%22">Rubber coatings</searchLink><br /><searchLink fieldCode="DE" term="%22Phase+separation+method+%28Engineering%29%22">Phase separation method (Engineering)</searchLink><br /><searchLink fieldCode="DE" term="%22Polyesters%22">Polyesters</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: The morphology, as well as the related fracture and mechanical behavior of vinyl ester resins (DVER) of different molecular weights cured with styrene (S) and modified with two different liquid rubbers are presented and discussed. The liquid rubbers are: carboxyl terminated poly(butadiene- co-acrylonitrile) (CTBN), a common toughening agent for epoxy resins, and an almost unreactive rubber with the DVER and S comonomers, and a reactive rubber (vinyl terminated poly(butadiene- co-acrylonitrile), (VTBN). The initial miscibility of the modified systems and the reactivity of the rubber determine the final morphology of the material. This morphology will correspond to a continuous main phase (rich in the DVER-S copolymer) with simple rubber rich inclusions (as in the epoxy-rubber systems) or with inclusions with a complex internal structure, where phase separation occurs as in the low profile modified unsaturated polyester resins. The morphologies developed are strongly dependent on the resin molecular weight as well as on the elastomer added. In spite of the initially higher compatibility of the S-DVER-CTBN system with respect to the S-DVER-VTBN system, the reactivity of the vinyl-ended elastomer leads to a much finer distribution of the elastomeric phase. In particular, the low molecular weight resin cured with S and modified with 10% of CTBN leads to a cocontinuous structure with microvoids that generates a material of low density and poor mechanical and fracture properties. On the other hand, the use of VTBN as additive leads to a more compact morphology, with gradual reduction of the mechanical performance of the modified resins and improved fracture behavior. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Journal of Materials Science is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1023/A:1020031701950 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 10 StartPage: 4117 Subjects: – SubjectFull: Rubber additives Type: general – SubjectFull: Molecular weights Type: general – SubjectFull: Styrene Type: general – SubjectFull: Epoxy resins Type: general – SubjectFull: Gums & resins Type: general – SubjectFull: Rubber coatings Type: general – SubjectFull: Phase separation method (Engineering) Type: general – SubjectFull: Polyesters Type: general Titles: – TitleFull: Rubber modified vinyl ester resins of different molecular weights. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Auad, M. L. – PersonEntity: Name: NameFull: Proia, M. – PersonEntity: Name: NameFull: Borrajo, J. – PersonEntity: Name: NameFull: Aranguren, M. I. IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 10 Text: Oct2002 Type: published Y: 2002 Identifiers: – Type: issn-print Value: 00222461 Numbering: – Type: volume Value: 37 – Type: issue Value: 19 Titles: – TitleFull: Journal of Materials Science Type: main |
| ResultId | 1 |
