Positron annihilation lifetime spectroscopy of poly(ethylene terephthalate): Contributions from rigid and mobile amorphous fractions

被引：62

作者：

Olson, BG

Lin, J

Nazarenko, S

Jamieson, AM ^{[1
]}

机构：

[1] Case Western Reserve Univ, Dept Macromol Sci & Engn, Cleveland, OH 44106 USA

[2] Case Western Reserve Univ, Dept Phys, Cleveland, OH 44106 USA

来源：

MACROMOLECULES | 2003年 / 36卷 / 20期

关键词：

D O I：

10.1021/ma034813u

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Systematic divergences in the orthopositronium (o-Ps) annihilation lifetimes, tau(3), and intensities, I-3, are observed, when comparing melt-crystallized and cold-crystallized poly(ethylene terephthalate) (PET) as a function of crystallinity. Following a previous analysis of corresponding deviations in oxygen permeability, the divergences in I-3 and tau(3) are traced to distinct characteristic values for the probability of o-Ps formation and o-Ps lifetime in the rigid amorphous phase (RAF) associated with the crystalline lamellae and the mobile amorphous regions (MAF) which are unperturbed by the presence of the crystal phase. Utilizing independent information on the volume fractions of RAF and MAF, a quantitative analysis of the o-Ps annihilation parameters is possible.

引用

收藏

页码：7618 / 7623

页数：6

相关论文

共 39 条

[1]

BONDI AA, 1916, PHYSICAL PROPERTIES

[2] GAMMA-IRRADIATION OF POLYETHYLENE STUDIED BY POSITRON-ANNIHILATION [J].

BRAUER, G ;

HERTLE, W ;

BALOGH, AG .

PHYSICA STATUS SOLIDI A-APPLIED RESEARCH, 1988, 105 (01) :K7-K12

[3]

Chang GW, 1997, J APPL POLYM SCI, V63, P483

[4] GLASS-TRANSITION AND MELTING BEHAVIOR OF POLY(THIO-1,4-PHENYLENE) [J].

CHENG, SZD ;

WU, ZQ ;

WUNDERLICH, B .

MACROMOLECULES, 1987, 20 (11) :2802-2810

[5] GLASS-TRANSITION AND MELTING BEHAVIOR OF POLY(OXY-1,4-PHENYLENEOXY-1,4-PHENYLENECARBONYL-1,4-PHENYLENE) [J].

CHENG, SZD ;

CAO, MY ;

WUNDERLICH, B .

MACROMOLECULES, 1986, 19 (07) :1868-1876

[6] Free volume, glass transition, and degree of branching in metallocene-based propylene/α-olefin copolymers:: Positron lifetime, density, and differential scanning calorimetric studies [J].

Dlubek, G ;

Bamford, D ;

Rodriguez-Gonzalez, A ;

Bornemann, S ;

Stejny, J ;

Schade, B ;

Alam, MA ;

Arnold, M .

JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS, 2002, 40 (05) :434-453

[7] Free-volume variation in polyethylenes of different crystallinities:: Positron lifetime, density, and X-ray studies [J].

Dlubek, G ;

Stejny, J ;

Lüpke, T ;

Bamford, D ;

Petters, K ;

Hübner, C ;

Alam, MA ;

Hill, MJ .

JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS, 2002, 40 (01) :65-81

[8] Effect of cross-linking on the free-volume properties of diethylene glycol bis(allyl carbonate) polymer networks: A positron annihilation lifetime study [J].

Dlubek, G ;

Stejny, J ;

Alam, MA .

MACROMOLECULES, 1998, 31 (14) :4574-4580

[9] Positron states in polyethylene and polytetrafluoroethylene: A positron lifetime and Doppler-broadening study [J].

Dlubek, G ;

Saarinen, K ;

Fretwell, HM .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, 1998, 142 (1-2) :139-155

[10] THERMAL HISTORY AND TEMPERATURE-DEPENDENCE OF VISCOELASTIC PROPERTIES OF POLYMER GLASSES - RELATION TO FREE-VOLUME QUANTITIES [J].

HIGUCHI, H ;

YU, Z ;

JAMIESON, AM ;

SIMHA, R ;

MCGERVEY, JD .

JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS, 1995, 33 (17) :2295-2305

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