Viscoelasticity of ABS samples differing in thermal history
| ISSN: |
0032-3888
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|---|---|
| Keywords: |
Chemistry ; Chemical Engineering
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| Source: |
Wiley InterScience Backfile Collection 1832-2000
|
| Topics: |
Chemistry and Pharmacology
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Physics
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| Notes: |
An important parameter in the various molding techniques used in polymer processing is the rate of cooling the object. The effect of the thermal history on the linear viscoelastic properties was studied, mainly by means of stress relaxation experiments on ABS samples in which the influence of other process variables was eliminated. In agreement with recent literature data, it appeared that the time dependence of the stress can be represented by a universal formula, provided that no perceptible change in temperature or relaxation of volume takes place during the experiment. The position of the momentary relaxation curve along the time scale can therefore be described by one characteristic mechanical relaxation time tr. The value of tr is affected by the temperature T, but even more by the thermal history, i.e., by the rate of cooling, q, and the annealing time, ta, at the measuring temperature previous to recording of the relaxation curve. In the case of very rapidly quenched samples, exact proportionality was found to exist between tr and ta at temperatures below Tg -15°C. In slowly cooled samples tr can be longer by a factor of ten than in quenched samples, at the same T and at annealing times of about 1 h. The difference decreases with increasing ta, but remains substantial up to ta values much longer than the total cooling time.
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| Additional Material: |
7 Ill.
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| Type of Medium: |
Electronic Resource
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| URL: |
| _version_ | 1798297822769971201 |
|---|---|
| addmaterial | 7 Ill. |
| autor | Booij, H. C. Palmen, J. H. M. |
| autorsonst | Booij, H. C. Palmen, J. H. M. |
| book_url | http://dx.doi.org/10.1002/pen.760181008 |
| datenlieferant | nat_lic_papers |
| hauptsatz | hsatz_simple |
| identnr | NLM160219493 |
| issn | 0032-3888 |
| journal_name | Polymer Engineering and Science |
| materialart | 1 |
| notes | An important parameter in the various molding techniques used in polymer processing is the rate of cooling the object. The effect of the thermal history on the linear viscoelastic properties was studied, mainly by means of stress relaxation experiments on ABS samples in which the influence of other process variables was eliminated. In agreement with recent literature data, it appeared that the time dependence of the stress can be represented by a universal formula, provided that no perceptible change in temperature or relaxation of volume takes place during the experiment. The position of the momentary relaxation curve along the time scale can therefore be described by one characteristic mechanical relaxation time tr. The value of tr is affected by the temperature T, but even more by the thermal history, i.e., by the rate of cooling, q, and the annealing time, ta, at the measuring temperature previous to recording of the relaxation curve. In the case of very rapidly quenched samples, exact proportionality was found to exist between tr and ta at temperatures below Tg -15°C. In slowly cooled samples tr can be longer by a factor of ten than in quenched samples, at the same T and at annealing times of about 1 h. The difference decreases with increasing ta, but remains substantial up to ta values much longer than the total cooling time. |
| package_name | Wiley-Blackwell |
| publikationsjahr_anzeige | 1978 |
| publikationsjahr_facette | 1978 |
| publikationsjahr_intervall | 8024:1975-1979 |
| publikationsjahr_sort | 1978 |
| publikationsort | Stamford, Conn. [u.a.] |
| publisher | Wiley-Blackwell |
| reference | 18 (1978), S. 781-787 |
| schlagwort | Chemistry Chemical Engineering |
| search_space | articles |
| shingle_author_1 | Booij, H. C. Palmen, J. H. M. |
| shingle_author_2 | Booij, H. C. Palmen, J. H. M. |
| shingle_author_3 | Booij, H. C. Palmen, J. H. M. |
| shingle_author_4 | Booij, H. C. Palmen, J. H. M. |
| shingle_catch_all_1 | Booij, H. C. Palmen, J. H. M. Viscoelasticity of ABS samples differing in thermal history Chemistry Chemical Engineering Chemistry Chemical Engineering An important parameter in the various molding techniques used in polymer processing is the rate of cooling the object. The effect of the thermal history on the linear viscoelastic properties was studied, mainly by means of stress relaxation experiments on ABS samples in which the influence of other process variables was eliminated. In agreement with recent literature data, it appeared that the time dependence of the stress can be represented by a universal formula, provided that no perceptible change in temperature or relaxation of volume takes place during the experiment. The position of the momentary relaxation curve along the time scale can therefore be described by one characteristic mechanical relaxation time tr. The value of tr is affected by the temperature T, but even more by the thermal history, i.e., by the rate of cooling, q, and the annealing time, ta, at the measuring temperature previous to recording of the relaxation curve. In the case of very rapidly quenched samples, exact proportionality was found to exist between tr and ta at temperatures below Tg -15°C. In slowly cooled samples tr can be longer by a factor of ten than in quenched samples, at the same T and at annealing times of about 1 h. The difference decreases with increasing ta, but remains substantial up to ta values much longer than the total cooling time. 0032-3888 00323888 Wiley-Blackwell |
| shingle_catch_all_2 | Booij, H. C. Palmen, J. H. M. Viscoelasticity of ABS samples differing in thermal history Chemistry Chemical Engineering Chemistry Chemical Engineering An important parameter in the various molding techniques used in polymer processing is the rate of cooling the object. The effect of the thermal history on the linear viscoelastic properties was studied, mainly by means of stress relaxation experiments on ABS samples in which the influence of other process variables was eliminated. In agreement with recent literature data, it appeared that the time dependence of the stress can be represented by a universal formula, provided that no perceptible change in temperature or relaxation of volume takes place during the experiment. The position of the momentary relaxation curve along the time scale can therefore be described by one characteristic mechanical relaxation time tr. The value of tr is affected by the temperature T, but even more by the thermal history, i.e., by the rate of cooling, q, and the annealing time, ta, at the measuring temperature previous to recording of the relaxation curve. In the case of very rapidly quenched samples, exact proportionality was found to exist between tr and ta at temperatures below Tg -15°C. In slowly cooled samples tr can be longer by a factor of ten than in quenched samples, at the same T and at annealing times of about 1 h. The difference decreases with increasing ta, but remains substantial up to ta values much longer than the total cooling time. 0032-3888 00323888 Wiley-Blackwell |
| shingle_catch_all_3 | Booij, H. C. Palmen, J. H. M. Viscoelasticity of ABS samples differing in thermal history Chemistry Chemical Engineering Chemistry Chemical Engineering An important parameter in the various molding techniques used in polymer processing is the rate of cooling the object. The effect of the thermal history on the linear viscoelastic properties was studied, mainly by means of stress relaxation experiments on ABS samples in which the influence of other process variables was eliminated. In agreement with recent literature data, it appeared that the time dependence of the stress can be represented by a universal formula, provided that no perceptible change in temperature or relaxation of volume takes place during the experiment. The position of the momentary relaxation curve along the time scale can therefore be described by one characteristic mechanical relaxation time tr. The value of tr is affected by the temperature T, but even more by the thermal history, i.e., by the rate of cooling, q, and the annealing time, ta, at the measuring temperature previous to recording of the relaxation curve. In the case of very rapidly quenched samples, exact proportionality was found to exist between tr and ta at temperatures below Tg -15°C. In slowly cooled samples tr can be longer by a factor of ten than in quenched samples, at the same T and at annealing times of about 1 h. The difference decreases with increasing ta, but remains substantial up to ta values much longer than the total cooling time. 0032-3888 00323888 Wiley-Blackwell |
| shingle_catch_all_4 | Booij, H. C. Palmen, J. H. M. Viscoelasticity of ABS samples differing in thermal history Chemistry Chemical Engineering Chemistry Chemical Engineering An important parameter in the various molding techniques used in polymer processing is the rate of cooling the object. The effect of the thermal history on the linear viscoelastic properties was studied, mainly by means of stress relaxation experiments on ABS samples in which the influence of other process variables was eliminated. In agreement with recent literature data, it appeared that the time dependence of the stress can be represented by a universal formula, provided that no perceptible change in temperature or relaxation of volume takes place during the experiment. The position of the momentary relaxation curve along the time scale can therefore be described by one characteristic mechanical relaxation time tr. The value of tr is affected by the temperature T, but even more by the thermal history, i.e., by the rate of cooling, q, and the annealing time, ta, at the measuring temperature previous to recording of the relaxation curve. In the case of very rapidly quenched samples, exact proportionality was found to exist between tr and ta at temperatures below Tg -15°C. In slowly cooled samples tr can be longer by a factor of ten than in quenched samples, at the same T and at annealing times of about 1 h. The difference decreases with increasing ta, but remains substantial up to ta values much longer than the total cooling time. 0032-3888 00323888 Wiley-Blackwell |
| shingle_title_1 | Viscoelasticity of ABS samples differing in thermal history |
| shingle_title_2 | Viscoelasticity of ABS samples differing in thermal history |
| shingle_title_3 | Viscoelasticity of ABS samples differing in thermal history |
| shingle_title_4 | Viscoelasticity of ABS samples differing in thermal history |
| sigel_instance_filter | dkfz geomar wilbert ipn albert |
| source_archive | Wiley InterScience Backfile Collection 1832-2000 |
| timestamp | 2024-05-06T10:14:06.468Z |
| titel | Viscoelasticity of ABS samples differing in thermal history |
| titel_suche | Viscoelasticity of ABS samples differing in thermal history |
| topic | V ZL U |
| uid | nat_lic_papers_NLM160219493 |