Physical Aging in Amorphous Poly(ethylene furanoate): Enthalpic Recovery, Density, and Oxygen Transport Considerations

被引：30

作者：

Burgess, Steven K. ^{[1
]}

Mubarak, Christopher R. ^{[2
]}

Kriegel, Robert M. ^{[2
]}

Koros, William J. ^{[1
]}

机构：

[1] Georgia Inst Technol, Sch Chem & Biomol Engn, Atlanta, GA 30332 USA

[2] Coca Cola Co, Atlanta, GA 30313 USA

来源：

JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS | 2015年 / 53卷 / 06期

关键词：

2; 5-furandicarboxylic acid; barrier; density; enthalpic relaxation; free volume; gas permeation; PEF; physical aging; polyesters; thermal properties; GLASSY POLYMER-FILMS; STRUCTURAL RELAXATION; GAS-PERMEABILITY; POLY(METHYL METHACRYLATE); FICTIVE TEMPERATURE; BARRIER MATERIALS; PRIOR HISTORY; POLY(ETHYLENE-TEREPHTHALATE); TRANSITION; SORPTION;

D O I：

10.1002/polb.23648

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

The current work utilizes three separate techniques to study the physical aging process in amorphous poly(ethylene furanoate) (PEF), which is a recently introduced engineering thermoplastic with enhanced properties compared to petroleum-sourced poly(ethylene terephthalate). Differential scanning calorimetry aging experiments were conducted at multiple aging temperatures and times, and the resultant enthalpic recovery values compared to the theoretical maximum enthalpy loss evaluated from calculations involving extrapolation of the equilibrium liquid line. Density measurements reveal densification of the matrix for the aged versus unaged samples, and provide an estimate for the reduction in free volume for the aged samples. Complementary oxygen permeation and pressure-decay sorption experiments provide independent verification of the free volume reduction mechanism for physical aging in glassy polymers. The current work provides the first detailed aging study for PEF. (c) 2014 Wiley Periodicals, Inc. J. Polym. Sci., Part B: Polym. Phys. 2015, 53, 389-399

引用

页码：389 / 399

页数：11

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