Reactive melt mixing of PC/PEN blend. Structural characterization of reaction products.
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| Title: | Reactive melt mixing of PC/PEN blend. Structural characterization of reaction products. |
|---|---|
| Authors: | Samperi, Filippo1 fsamperi@unict.it, Battiato, Salvatore1, Recca, Giuseppe1, Puglisi, Concetto1, Mendichi, Raniero2 |
| Source: | Polymer. Sep2015, Vol. 74, p108-123. 16p. |
| Subjects: | Chemical reactions, Polymer blends, Bisphenol A, Carbonates, Exchange reactions, Carbon dioxide |
| Abstract: | Chemical reactions occurring during reactive melt mixing of equimolar blend of poly(bisphenol-A carbonate) and poly(ethylene 2,6-naphthalate) at 280 °C in presence of a catalyst, were studied. Beside expected direct “inner–inner” ester-carbonate and outer–inner exchange reactions, consecutive reactions that lead to the elimination of CO 2 and ethylene carbonate from backbone, were also detected. The composition and the architecture of the formed copolymers change as the mixing time increases. Initial PC-PEN block copolymers formed at lower mixing time (2 min) evolve towards the formation of naphthalate based random copoly(ester-ether)s at reaction time higher than 45 min, owing to total elimination of carbonate units. Determination of composition and microstructure of copolymers formed was attempted by ( 1 H and 13 C)-NMR analyses applying appropriate chemical microstructural model. Dyads and triads sequences determined here give detailed information on the change in the molar fractions of the sequences with increasing the reaction time. DSC analysis shows that block copolymer formed at 2 min mixing present two glass transition (Tg) temperatures close to those of initial homopolymers, whereas the other ones show a single Tg that changes as a function of their dyads molar compositions. Thermogravimetric analysis show that the more thermally stable copolymers are random copoly(ester-ether)s formed at higher reaction time. [ABSTRACT FROM AUTHOR] |
| 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 |
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| Header | DbId: egs DbLabel: Engineering Source An: 109495588 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Reactive melt mixing of PC/PEN blend. Structural characterization of reaction products. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Samperi%2C+Filippo%22">Samperi, Filippo</searchLink><relatesTo>1</relatesTo><i> fsamperi@unict.it</i><br /><searchLink fieldCode="AR" term="%22Battiato%2C+Salvatore%22">Battiato, Salvatore</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Recca%2C+Giuseppe%22">Recca, Giuseppe</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Puglisi%2C+Concetto%22">Puglisi, Concetto</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Mendichi%2C+Raniero%22">Mendichi, Raniero</searchLink><relatesTo>2</relatesTo> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Polymer%22">Polymer</searchLink>. Sep2015, Vol. 74, p108-123. 16p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Chemical+reactions%22">Chemical reactions</searchLink><br /><searchLink fieldCode="DE" term="%22Polymer+blends%22">Polymer blends</searchLink><br /><searchLink fieldCode="DE" term="%22Bisphenol+A%22">Bisphenol A</searchLink><br /><searchLink fieldCode="DE" term="%22Carbonates%22">Carbonates</searchLink><br /><searchLink fieldCode="DE" term="%22Exchange+reactions%22">Exchange reactions</searchLink><br /><searchLink fieldCode="DE" term="%22Carbon+dioxide%22">Carbon dioxide</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Chemical reactions occurring during reactive melt mixing of equimolar blend of poly(bisphenol-A carbonate) and poly(ethylene 2,6-naphthalate) at 280 °C in presence of a catalyst, were studied. Beside expected direct “inner–inner” ester-carbonate and outer–inner exchange reactions, consecutive reactions that lead to the elimination of CO 2 and ethylene carbonate from backbone, were also detected. The composition and the architecture of the formed copolymers change as the mixing time increases. Initial PC-PEN block copolymers formed at lower mixing time (2 min) evolve towards the formation of naphthalate based random copoly(ester-ether)s at reaction time higher than 45 min, owing to total elimination of carbonate units. Determination of composition and microstructure of copolymers formed was attempted by ( 1 H and 13 C)-NMR analyses applying appropriate chemical microstructural model. Dyads and triads sequences determined here give detailed information on the change in the molar fractions of the sequences with increasing the reaction time. DSC analysis shows that block copolymer formed at 2 min mixing present two glass transition (Tg) temperatures close to those of initial homopolymers, whereas the other ones show a single Tg that changes as a function of their dyads molar compositions. Thermogravimetric analysis show that the more thermally stable copolymers are random copoly(ester-ether)s formed at higher reaction time. [ABSTRACT FROM AUTHOR] – 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.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1016/j.polymer.2015.07.059 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 16 StartPage: 108 Subjects: – SubjectFull: Chemical reactions Type: general – SubjectFull: Polymer blends Type: general – SubjectFull: Bisphenol A Type: general – SubjectFull: Carbonates Type: general – SubjectFull: Exchange reactions Type: general – SubjectFull: Carbon dioxide Type: general Titles: – TitleFull: Reactive melt mixing of PC/PEN blend. Structural characterization of reaction products. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Samperi, Filippo – PersonEntity: Name: NameFull: Battiato, Salvatore – PersonEntity: Name: NameFull: Recca, Giuseppe – PersonEntity: Name: NameFull: Puglisi, Concetto – PersonEntity: Name: NameFull: Mendichi, Raniero IsPartOfRelationships: – BibEntity: Dates: – D: 15 M: 09 Text: Sep2015 Type: published Y: 2015 Identifiers: – Type: issn-print Value: 00323861 Numbering: – Type: volume Value: 74 Titles: – TitleFull: Polymer Type: main |
| ResultId | 1 |
