Crystallization behavior of polymer/montmorillonite nanocomposites. Part III. Polyamide-6/montmorillonite nanocomposites, influence of matrix molecular weight, and of montmorillonite type and concentration
Saved in:
| Title: | Crystallization behavior of polymer/montmorillonite nanocomposites. Part III. Polyamide-6/montmorillonite nanocomposites, influence of matrix molecular weight, and of montmorillonite type and concentration |
|---|---|
| Authors: | Homminga, Douwe S.1, Goderis, Bart1, Mathot, Vincent B.F.1, Groeninckx, Gabriel gabriel.groeninckx@chem.kuleuven.ac.be |
| Source: | Polymer. Feb2006, Vol. 47 Issue 5, p1630-1639. 10p. |
| Subjects: | Polyamides, Montmorillonite, Molecular weights, X-ray diffraction, Crystallization |
| Abstract: | Abstract: Several series of polyamide-6 (PA-6) nanocomposites, differing in montmorillonite (MMT) type and content and PA-6 matrix molecular weight, were prepared by melt-extrusion and the associated PA-6 crystallization behavior and morphology was evaluated using (synchrotron) X-ray diffraction, transmission electron microscopy and differential scanning calorimetry. The nucleating ability of silicate layers is poor in PA-6 nanocomposites made by melt-extrusion because highly active, stable PA-6 crystallization precursors are generated during melt-extrusion. In most of the studied PA-6/MMT nanocomposites the dispersed silicate layers act as impurities and decrease rather than increase the overall crystallization kinetics of PA-6, especially at high MMT contents. Furthermore, at a given MMT concentration, the crystal growth retardation inflates with increasing degree of exfoliation, which dependents on the MMT type and which increases with increasing PA-6 molecular weight. One of the considered MMT types leads to a poorly exfoliated nanomorphology and as a result no retardation of crystal growth is observed. Furthermore, the disturbed crystal growth does not alter the PA-6 semicrystalline stack morphology. Moderate nucleation effects due to the presence of MMT can be observed when the particle load is low (low amount of MMT and/or poor degree of exfoliation) and provided the supercooling is sufficiently large. [Copyright &y& Elsevier] |
| Copyright of Polymer is the property of Elsevier B.V. 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 |
| FullText | Text: Availability: 0 |
|---|---|
| Header | DbId: egs DbLabel: Engineering Source An: 19770800 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
| IllustrationInfo | |
| Items | – Name: Title Label: Title Group: Ti Data: Crystallization behavior of polymer/montmorillonite nanocomposites. Part III. Polyamide-6/montmorillonite nanocomposites, influence of matrix molecular weight, and of montmorillonite type and concentration – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Homminga%2C+Douwe+S%2E%22">Homminga, Douwe S.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Goderis%2C+Bart%22">Goderis, Bart</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Mathot%2C+Vincent+B%2EF%2E%22">Mathot, Vincent B.F.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Groeninckx%2C+Gabriel%22">Groeninckx, Gabriel</searchLink><i> gabriel.groeninckx@chem.kuleuven.ac.be</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Polymer%22">Polymer</searchLink>. Feb2006, Vol. 47 Issue 5, p1630-1639. 10p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Polyamides%22">Polyamides</searchLink><br /><searchLink fieldCode="DE" term="%22Montmorillonite%22">Montmorillonite</searchLink><br /><searchLink fieldCode="DE" term="%22Molecular+weights%22">Molecular weights</searchLink><br /><searchLink fieldCode="DE" term="%22X-ray+diffraction%22">X-ray diffraction</searchLink><br /><searchLink fieldCode="DE" term="%22Crystallization%22">Crystallization</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Abstract: Several series of polyamide-6 (PA-6) nanocomposites, differing in montmorillonite (MMT) type and content and PA-6 matrix molecular weight, were prepared by melt-extrusion and the associated PA-6 crystallization behavior and morphology was evaluated using (synchrotron) X-ray diffraction, transmission electron microscopy and differential scanning calorimetry. The nucleating ability of silicate layers is poor in PA-6 nanocomposites made by melt-extrusion because highly active, stable PA-6 crystallization precursors are generated during melt-extrusion. In most of the studied PA-6/MMT nanocomposites the dispersed silicate layers act as impurities and decrease rather than increase the overall crystallization kinetics of PA-6, especially at high MMT contents. Furthermore, at a given MMT concentration, the crystal growth retardation inflates with increasing degree of exfoliation, which dependents on the MMT type and which increases with increasing PA-6 molecular weight. One of the considered MMT types leads to a poorly exfoliated nanomorphology and as a result no retardation of crystal growth is observed. Furthermore, the disturbed crystal growth does not alter the PA-6 semicrystalline stack morphology. Moderate nucleation effects due to the presence of MMT can be observed when the particle load is low (low amount of MMT and/or poor degree of exfoliation) and provided the supercooling is sufficiently large. [Copyright &y& Elsevier] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Polymer is the property of Elsevier B.V. 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.) |
| PLink | https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=egs&AN=19770800 |
| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1016/j.polymer.2005.10.141 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 10 StartPage: 1630 Subjects: – SubjectFull: Polyamides Type: general – SubjectFull: Montmorillonite Type: general – SubjectFull: Molecular weights Type: general – SubjectFull: X-ray diffraction Type: general – SubjectFull: Crystallization Type: general Titles: – TitleFull: Crystallization behavior of polymer/montmorillonite nanocomposites. Part III. Polyamide-6/montmorillonite nanocomposites, influence of matrix molecular weight, and of montmorillonite type and concentration Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Homminga, Douwe S. – PersonEntity: Name: NameFull: Goderis, Bart – PersonEntity: Name: NameFull: Mathot, Vincent B.F. – PersonEntity: Name: NameFull: Groeninckx, Gabriel IsPartOfRelationships: – BibEntity: Dates: – D: 22 M: 02 Text: Feb2006 Type: published Y: 2006 Identifiers: – Type: issn-print Value: 00323861 Numbering: – Type: volume Value: 47 – Type: issue Value: 5 Titles: – TitleFull: Polymer Type: main |
| ResultId | 1 |
