Study on the volatilization behavior of monomer and oligomers in polyamide-6 melt by dynamic film–forming device

IF 1.7 4区工程技术 Q4 POLYMER SCIENCE

Journal of Polymer Engineering Pub Date : 2023-10-19 DOI:10.1515/polyeng-2023-0142

Xia Zhu, Linzhong Tao, Liping Chen, Siwei Xiong, Feihua Yang, Yingbin Jia, Luoxin Wang, Hua Wang

{"title":"Study on the volatilization behavior of monomer and oligomers in polyamide-6 melt by dynamic film–forming device","authors":"Xia Zhu, Linzhong Tao, Liping Chen, Siwei Xiong, Feihua Yang, Yingbin Jia, Luoxin Wang, Hua Wang","doi":"10.1515/polyeng-2023-0142","DOIUrl":null,"url":null,"abstract":"Abstract In this study, a modified torque rheometer is used to investigate the volatilization behavior of monomer and oligomers in polyamide-6 (PA6) melt under dynamic film–forming conditions with negative pressure. The surface renewal model is employed to simulate the volatilization behavior. The effects of actual processing factors and simulation results on the volatilization behavior of monomer and oligomer are analyzed comparatively. It is found that the monomer and oligomers removal rate increase continuously with increasing temperature, residence time, and rotational speed. And, the cyclic dimer, which is extremely harmful to spinning, can be removed. It is found that the removal of monomer and oligomers continued to increase with increasing temperature, residence time, and spinning speed. Moreover, cyclic dimers, which are extremely harmful to spinning, are also removed. Additionally, it is discovered that the polycondensation reaction of PA6 results in an increase in the molecular weight and viscosity at lower temperatures (250 °C), while a higher temperature (270 °C) and shear rate (150 r/min) cause a reduction in viscosity and molecular weight.","PeriodicalId":16881,"journal":{"name":"Journal of Polymer Engineering","volume":null,"pages":null},"PeriodicalIF":1.7000,"publicationDate":"2023-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Polymer Engineering","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1515/polyeng-2023-0142","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"POLYMER SCIENCE","Score":null,"Total":0}

引用次数: 0

Abstract

Abstract In this study, a modified torque rheometer is used to investigate the volatilization behavior of monomer and oligomers in polyamide-6 (PA6) melt under dynamic film–forming conditions with negative pressure. The surface renewal model is employed to simulate the volatilization behavior. The effects of actual processing factors and simulation results on the volatilization behavior of monomer and oligomer are analyzed comparatively. It is found that the monomer and oligomers removal rate increase continuously with increasing temperature, residence time, and rotational speed. And, the cyclic dimer, which is extremely harmful to spinning, can be removed. It is found that the removal of monomer and oligomers continued to increase with increasing temperature, residence time, and spinning speed. Moreover, cyclic dimers, which are extremely harmful to spinning, are also removed. Additionally, it is discovered that the polycondensation reaction of PA6 results in an increase in the molecular weight and viscosity at lower temperatures (250 °C), while a higher temperature (270 °C) and shear rate (150 r/min) cause a reduction in viscosity and molecular weight.

查看原文本刊更多论文

用动态成膜装置研究聚酰胺-6熔体中单体和低聚物的挥发行为

摘要本研究采用改进的扭矩流变仪，研究了负压动态成膜条件下PA6熔体中单体和低聚物的挥发行为。采用表面更新模型对挥发行为进行了模拟。对比分析了实际工艺因素和模拟结果对单体和低聚物挥发行为的影响。随着温度、停留时间和转速的增加，单体和低聚物的去除率不断提高。并且，可以去除对纺丝极有害的环二聚体。随着温度、停留时间和纺丝速度的增加，单体和低聚物的去除率继续增加。此外，还去除了对纺丝有害的环二聚体。此外，还发现PA6的缩聚反应在较低温度(250℃)下导致分子量和分子量的增加，而在较高温度(270℃)和剪切速率(150 r/min)下导致粘度和分子量的降低。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Journal of Polymer Engineering 工程技术-高分子科学

CiteScore

3.20

自引率

5.00%

发文量

审稿时长

2.5 months

期刊介绍： Journal of Polymer Engineering publishes reviews, original basic and applied research contributions as well as recent technological developments in polymer engineering. Polymer engineering is a strongly interdisciplinary field and papers published by the journal may span areas such as polymer physics, polymer processing and engineering of polymer-based materials and their applications. The editors and the publisher are committed to high quality standards and rapid handling of the peer review and publication processes.