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Migration-resistant polymeric plasticizer for poly(vinyl chloride)
KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.ORCID iD: 0000-0002-7790-8987
2007 (English)In: Journal of Applied Polymer Science, ISSN 0021-8995, E-ISSN 1097-4628, Vol. 104, no 4, 2458-2467 p.Article in journal (Refereed) Published
Abstract [en]

Flexible films of poly(vinyl chloride) (PVC) and linear or branched poly(butylene adipate) (PBA), synthesized from 1,4-butanediol and adipic acid or dimethyl ester of adipic acid, were aged in an aqueous environment for 10 weeks to study how branching, molar mass, and end-group functionality affect the leaching of polyester plasticizer from thin films. Principal component analysis was applied to reveal patterns and correlations between mechanical properties, material characteristics, and aging behavior. Introduction of branches in the polyester structure increased the miscibility between PVC and the polyester, resulting in improved mechanical properties and lower water absorption. Methyl ester end-group in PBA polyester stabilized the polymeric plasticizer toward hydrolysis, and reduced the formation and migration of monomeric degradation products from the blends during aging in water. The combination of branched structure with methyl ester end-groups resulted in a migration resistant polymeric plasticizer.

Place, publisher, year, edition, pages
2007. Vol. 104, no 4, 2458-2467 p.
Keyword [en]
Blends; Chromatography; Degradation; Poly(vinyl chloride); Polyester; Carboxylic acids; Mechanical properties; Polymers; Polyvinyl chlorides; Principal component analysis; Synthesis (chemical); Thin films; Aging behavior; End-group functionality; Polymeric plasticizer; aging; degradation; film; plasticizing agent; polybutylene; polyvinyl chloride; synthesis
National Category
Polymer Chemistry Polymer Technologies
Identifiers
URN: urn:nbn:se:kth:diva-6757DOI: 10.1002/app.24777ISI: 000245141400051Scopus ID: 2-s2.0-34147211164OAI: oai:DiVA.org:kth-6757DiVA: diva2:11558
Note

QC 20100805

Available from: 2007-02-14 Created: 2007-02-14 Last updated: 2017-12-14Bibliographically approved
In thesis
1. Environmentally Friendly Plasticizers for PVC: Improved Material Properties and Long-term Performance Through Plasticizer Design
Open this publication in new window or tab >>Environmentally Friendly Plasticizers for PVC: Improved Material Properties and Long-term Performance Through Plasticizer Design
2007 (English)Doctoral thesis, comprehensive summary (Other scientific)
Abstract [en]

Linear and branched poly(butylene adipate) polyesters with number-average molecular weights ranging from 700 to 10 000 g/mol, and degrees of branching ranging from very low to hyperbranched were solution cast with PVC to study the effects of chemical structure, molecular weight, end-group functionality, and chain architecture on plasticizing efficiency and durability. Miscibility was evaluated by the existence of a single glass transition temperature and a shift of the carbonyl group absorption band. Desirable mechanical properties were achieved in flexible PVC films containing 40 weight-% of polyester plasticizer. Methyl-ester-terminated polyesters with a low degree of branching and an intermediate molecular weight enhanced the plasticizing efficiency, as shown by greater elongation, good miscibility, and reduced surface segregation. A solid-phase extraction method was developed to extract the low molecular weight products that migrated from pure poly(butylene adipate) and PVC/ poly(butylene adipate) films during aging in water. The effects of branching, molecular weight, end-group functionality, and polydispersity on plasticizer permanence were evaluated by quantification of low molecular weight hydrolysis products, weight loss, surface segregation, and the preservation of material properties during aging. A more migration-resistant polymeric plasticizer was obtained by combining a low degree of branching, hydrolysis-protecting end-groups, and higher molecular weight of the polyester. Films plasticized with a slightly branched polyester showed the best durability and preservation of material and mechanical properties during aging. A high degree of branching resulted in partial miscibility with PVC, poor mechanical properties, and low migration resistance. The thermal stability of polyester-plasticized films was higher than that of films containing a low molecular weight plasticizer, and the stabilizing effect increased with increasing plasticizer concentration.

Place, publisher, year, edition, pages
Stockholm: KTH, 2007. 66 p.
Series
Trita-FPT-Report, ISSN 1652-2443 ; 2006:45
Keyword
poly(butylene adipate), poly(vinyl chloride), plasticizers, miscibility, mechanical properties, surface segregation, migration, degradation products
National Category
Polymer Chemistry
Identifiers
urn:nbn:se:kth:diva-4272 (URN)978-91-7178-557-2 (ISBN)
Public defence
2007-02-16, Sal F3, KTH, Lindstedtsvägen 26, Stockholm, 10:00
Opponent
Supervisors
Note
QC 20100805Available from: 2007-02-14 Created: 2007-02-14 Last updated: 2010-08-05Bibliographically approved

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Hakkarainen, Minna

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