Entrance pressure instability of LLDPE and its composites

doi:10.1039/c6ra19298j

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	Entrance pressure instability of LLDPE and its composites
	Hu, Haiqing 1; Liu, Jie1 ; Sun, Tongjie 1; Zhao, Jian 1; Wang, Xin 1; Li, Chaoxu2 ; Dong, Xia 3; Wang, Dujin 3
	2016
发表期刊	RSC ADVANCES
卷号	6 期号:85 页码:81703-81711
摘要	Oscillating flow, one of the most important instability phenomena in capillary flow, has long been identified to be related with the whole capillary pressure oscillation under constant piston speed. Although the appearance of surface distortions has been theorized by Weill since 1980 to originate in high-frequency oscillatory flow created at the die entry, the entrance pressure instability has not yet been studied experimentally. In this study Bagley correction was applied to calculate the instability of entrance pressure drop in capillary flow via both a constant-pressure capillary rheometer and a constant-rate capillary rheometer. The rheology of LLDPE and its composites with different kinds of fillers was measured to elaborate the phenomenon of flow instability. The entrance pressure fluctuation was clearly observed during the extrusion process, which was revealed to closely correlate with stress perturbation and extrudate morphologies. Furthermore, the flow instability was found to be depressed by increasing temperature and could be explained by the local stick-slip transition and disentanglement.
文章类型	Article
WOS标题词	Science & Technology ; Physical Sciences
DOI	10.1039/c6ra19298j
关键词[WOS]	LOW-DENSITY POLYETHYLENE ; MELT FLOW INSTABILITIES ; STICK-SLIP TRANSITION ; CAPILLARY-FLOW ; WALL SLIP ; OSCILLATING FLOW ; EXTRUDATE DISTORTION ; POLYMER MELTS ; EXTRUSION ; SHARKSKIN
收录类别	SCI
语种	英语
WOS研究方向	Chemistry
项目资助者	NSFC(51373084 ; Natural Science Foundation of Shandong Province(ZR2012EMM003) ; people's Republic of China 863 program(2015AA034003) ; 21474125)
WOS类目	Chemistry, Multidisciplinary
WOS记录号	WOS:000382776000031
引用统计
文献类型	期刊论文
条目标识符	http://ir.qibebt.ac.cn/handle/337004/8416
专题	仿生智能材料研究组
作者单位	1.Qingdao Univ Sci & Technol, Sch Polymer Sci & Engn, Key Lab Rubber Plast, Minist Educ,Shandong Prov Key Lab Rubber Plast, Qingdao 266042, Peoples R China 2.Chinese Acad Sci, Qingdao Inst Bioenergy & Bioproc Technol, CAS Key Lab Biobased Mat, Qingdao 266101, Peoples R China 3.Chinese Acad Sci, Beijing Natl Lab Mol Sci, Inst Chem, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Hu, Haiqing,Liu, Jie,Sun, Tongjie,et al. Entrance pressure instability of LLDPE and its composites[J]. RSC ADVANCES,2016,6(85):81703-81711.
APA	Hu, Haiqing.,Liu, Jie.,Sun, Tongjie.,Zhao, Jian.,Wang, Xin.,...&Wang, Dujin.(2016).Entrance pressure instability of LLDPE and its composites.RSC ADVANCES,6(85),81703-81711.
MLA	Hu, Haiqing,et al."Entrance pressure instability of LLDPE and its composites".RSC ADVANCES 6.85(2016):81703-81711.