Static and dynamic mechanical properties of nylon 66 annealed in glycerol.

Mitomo, Hiroshi; Nakazato, Keiichi

doi:10.2115/fiber.44.2_64

Cited by 5 publications

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“…The Tg determined by DSC was in the range of 55-59"C, similar to the values given in the literature (30)(31)(32)(33). Unlike results found upon aging of amorphous materials (1,2,24,25), the DSC thermograms of the aged nylon do not show the endothermic peak in the glass transition range usually associated with physical aging.…”

Section: Considering a Heat Of Fusion Of 188 J/g For The 100%supporting

confidence: 87%

“…Experiments were performed at aging test temperatures of 41, 45, 50, 55, 60, 65°C. Considering the DSC measured glass transition of 47-64°C given in the literature (30)(31)(32)(33). the experimental temperature range encompasses region 1, region 2, and the very lower end of region 3 of the four characteristic temperature regions defined by Struik (5).…”

Section: Isothermal Measurementsmentioning

confidence: 99%

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Physical aging of nylon 66

Spinu

McKenna

1994

Polymer Engineering & Sci

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The physical aging behavior of nylon 66 as a function of aging temperature, magnitude of applied stress, and aging time has been investigated. Creep tests were performed for samples quenched from a stabilization temperature of 160°C to aging temperatures between 41°C and 65°C, for aging times ranging from 0.5 to 64 h, and at stresses levels from 4 MPa to 24 MPa. Volume recovery was investigated for samples quenched from 160°C to aging temperatures of 41°C and 65°C. The creep compliance curves at different aging times were able to be superimposed. The double logarithmic shift rate was calculated and its dependence on aging temperature and applied stress was determined. Also, it was found that the volume recovery rate depends on the aging temperature. The time‐temperature and stress‐temperature superpositions were not possible for our data.

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Section: Considering a Heat Of Fusion Of 188 J/g For The 100%supporting

confidence: 87%

Section: Isothermal Measurementsmentioning

confidence: 99%

Physical aging of nylon 66

Spinu

McKenna

1994

Polymer Engineering & Sci

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Anionic copolymers of octanelactam with laurolactam (nylon 8/12 copolymers)—v. Effect of annealing on thermal properties and crystalline structure

Arvanitoyannis¹,

Blanshard²

1993

Polymer International

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The effects of different annealing time/temperature regimes on the thermal and crystalline behaviour of a series of statistical copolyamides (nylon 8/nylon 12), prepared by activated anionic polymerization of octanelactam/laurolactam (OL/LL), were determined by DSC, X‐ray (WAXS), density and viscosity measurements. The melting temperature and the heat of melting increased with annealing time and temperature. The results were correlated with the molar composition of the copolyamides and showed a gradual increase in percentage crystallinity with time.

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Physical Aging of Thin Films of Nylon and PET

Spinu

McKenna

1997

Journal of Plastic Film & Sheeting

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The physical aging of nylon 66 and PET [poly(ethylene terephthalate)] films as a function of aging temperature, magnitude of applied stress, and aging time was investigated. One hundred micron thick nylon films and 5μm and 190 μm films of PET were investigated in temperature ranges that extended from below the glass transition temperature to well above it. Creep experiments were performed to probe the evolution of the material response after quenching from a "stabilization" temperature to the aging temperature and it was found that the classical time-aging time superposition could be applied to both the nylon and PET materials in the temperature range from 25 to 60°C. The behaviors at higher temperature could not be superposed using time-aging time shifting. The rate of aging of the nylon films was found to be significantly different from that found for a similar nylon that had been injection molded.

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Static and dynamic mechanical properties of nylon 66 annealed in glycerol.

Abstract: The static mechanical properties of nylon 66 annealed in glycerol at 201•KC for various periods molecular chains exhibit local regularities over short ranges and the disordered region caused by introduction of irregularities.

Cited by 5 publications

References 0 publications

Physical aging of nylon 66

Physical aging of nylon 66

Anionic copolymers of octanelactam with laurolactam (nylon 8/12 copolymers)—v. Effect of annealing on thermal properties and crystalline structure

Physical Aging of Thin Films of Nylon and PET

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