热传递对自振荡颈部传播的影响

IF 1.1 4区 化学 Q4 POLYMER SCIENCE
S. L. Bazhenov, A. S. Kechek’yan
{"title":"热传递对自振荡颈部传播的影响","authors":"S. L. Bazhenov,&nbsp;A. S. Kechek’yan","doi":"10.1134/S0965545X24601138","DOIUrl":null,"url":null,"abstract":"<p>The effect of the surroundings on stress and temperature self-oscillations during stretching of polyethylene terephthalate films has been studied. The tests were carried out in air, helium, and sulfur hexafluoride. Spontaneous acceleration of plastic flow is due to the conversion into heat of elastic energy stored by the specimen during stretching. It has been shown that an increase in the thermal conductivity coefficient of the gas leads to an increase in the average stress and oscillation amplitude and a decrease in the oscillation frequency. These changes are explained by an increase in heat transfer and, accordingly, a decrease in the temperature of the polymer flow zone. A decrease in the film thickness leads to an increase in the heat transfer to heat release ratio, which is similar to an increase in the heat transfer coefficient.</p>","PeriodicalId":738,"journal":{"name":"Polymer Science, Series A","volume":"66 4","pages":"465 - 472"},"PeriodicalIF":1.1000,"publicationDate":"2024-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"On the Effect of Heat Transfer on Self-Oscillating Neck Propagation\",\"authors\":\"S. L. Bazhenov,&nbsp;A. S. Kechek’yan\",\"doi\":\"10.1134/S0965545X24601138\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>The effect of the surroundings on stress and temperature self-oscillations during stretching of polyethylene terephthalate films has been studied. The tests were carried out in air, helium, and sulfur hexafluoride. Spontaneous acceleration of plastic flow is due to the conversion into heat of elastic energy stored by the specimen during stretching. It has been shown that an increase in the thermal conductivity coefficient of the gas leads to an increase in the average stress and oscillation amplitude and a decrease in the oscillation frequency. These changes are explained by an increase in heat transfer and, accordingly, a decrease in the temperature of the polymer flow zone. A decrease in the film thickness leads to an increase in the heat transfer to heat release ratio, which is similar to an increase in the heat transfer coefficient.</p>\",\"PeriodicalId\":738,\"journal\":{\"name\":\"Polymer Science, Series A\",\"volume\":\"66 4\",\"pages\":\"465 - 472\"},\"PeriodicalIF\":1.1000,\"publicationDate\":\"2024-12-22\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Polymer Science, Series A\",\"FirstCategoryId\":\"1\",\"ListUrlMain\":\"https://link.springer.com/article/10.1134/S0965545X24601138\",\"RegionNum\":4,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"POLYMER SCIENCE\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Polymer Science, Series A","FirstCategoryId":"1","ListUrlMain":"https://link.springer.com/article/10.1134/S0965545X24601138","RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"POLYMER SCIENCE","Score":null,"Total":0}
引用次数: 0

摘要

研究了环境对聚对苯二甲酸乙二醇酯薄膜拉伸过程中应力和温度自振荡的影响。试验在空气、氦和六氟化硫中进行。塑性流动的自发加速是由于试样在拉伸过程中储存的弹性能转化为热。结果表明,随着气体导热系数的增大,平均应力和振荡幅度增大,振荡频率减小。这些变化可以用热传递的增加和相应的聚合物流动区温度的降低来解释。膜厚的减小导致换热放热比的增大,这与换热系数的增大相似。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

On the Effect of Heat Transfer on Self-Oscillating Neck Propagation

On the Effect of Heat Transfer on Self-Oscillating Neck Propagation

The effect of the surroundings on stress and temperature self-oscillations during stretching of polyethylene terephthalate films has been studied. The tests were carried out in air, helium, and sulfur hexafluoride. Spontaneous acceleration of plastic flow is due to the conversion into heat of elastic energy stored by the specimen during stretching. It has been shown that an increase in the thermal conductivity coefficient of the gas leads to an increase in the average stress and oscillation amplitude and a decrease in the oscillation frequency. These changes are explained by an increase in heat transfer and, accordingly, a decrease in the temperature of the polymer flow zone. A decrease in the film thickness leads to an increase in the heat transfer to heat release ratio, which is similar to an increase in the heat transfer coefficient.

求助全文
通过发布文献求助,成功后即可免费获取论文全文。 去求助
来源期刊
Polymer Science, Series A
Polymer Science, Series A 化学-高分子科学
CiteScore
1.70
自引率
0.00%
发文量
55
审稿时长
3 months
期刊介绍: Polymer Science, Series A is a journal published in collaboration with the Russian Academy of Sciences. Series A includes experimental and theoretical papers and reviews devoted to physicochemical studies of the structure and properties of polymers (6 issues a year). All journal series present original papers and reviews covering all fundamental aspects of macromolecular science. Contributions should be of marked novelty and interest for a broad readership. Articles may be written in English or Russian regardless of country and nationality of authors. All manuscripts are peer reviewed. Online submission via Internet to the Series A, B, and C is available at http://polymsci.ru.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:604180095
Book学术官方微信