[1]杜文博a,刘振宇a,蒋文军a,等.Unipol气相反应器中线性低密度聚乙烯粉料与块料的结构对比[J].石化技术与应用,2024,4:256-258.
DU Wen-boa,LIU Zhen-yua,JIANG Wen-juna,et al.Structure analysis of linear low density polyethylene powder and agglomeration in Unipol gas phase reactor[J].Petrochemical technology & application,2024,4:256-258.
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Unipol气相反应器中线性低密度聚乙烯粉料与块料的结构对比(PDF)
《石化技术与应用》[ISSN:1009-0046/CN:62-1138/TQ]
- 期数:
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2024年4期
- 页码:
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256-258
- 栏目:
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- 出版日期:
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2024-07-10
文章信息/Info
- Title:
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Structure analysis of linear low density polyethylene powder and agglomeration in Unipol gas phase reactor
- 文章编号:
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1009-0045(2024)04-0256-03
- 作者:
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杜文博a; 刘振宇a; 蒋文军a; 林华国b; 殷杰b
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中国石化茂名分公司 a.研究院,b.化工分部,广东 茂名 525011
- Author(s):
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DU Wen-boa; LIU Zhen-yua; JIANG Wen-juna; LIN Hua-guoa; YIN Jieb
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a.Research Institute,b. Department of Chemical Industry, Maoming Branch Company,SINOPEC, Maoming 525011, China
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- 关键词:
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线性低密度聚乙烯; 气相聚合; 粉料; 块料; 结晶; 相对分子质量
- Keywords:
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linear low density polyethylene; gas phase polymerization; powder; agglomeration; crystallization; relative molecular weight
- 分类号:
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TQ 325.1
- DOI:
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DOI:10.19909/j.cnki.ISSN1009-0045.2024.04.0256
- 文献标识码:
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B
- 摘要:
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对Unipol气相聚合工艺生产的2种牌号线性低密度聚乙烯(LLDPE)2720和7042的粉料及其块料的微观结构进行了表征,并对结块机理进行了分析。结果表明:2种牌号LLDPE的粉料与块料相比,熔点和结晶度都有不同程度的下降;结晶温度、相对分子质量以及熔体流动速率基本一致;2种牌号LLDPE粉料均具有较强的颗粒感观,而块料是细小颗粒熔融黏成块的结果,块料内部有气泡结构。块料形成主要是由扩散段的颗粒静电吸附和丁烯插入降低聚乙烯熔融温度的双重作用导致的。
- Abstract:
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The microstructure of powder material and its agglomeration material of two types of linear low density polyethylene (LLDPE) 2720 and 7042 produced by Unipol gas phase polymerization process were characterized and the agglomeration mechanism was analyzed. The results showed that the melting point and degree of crystallinity of agglomeration polyethylene decreased, the crystallization temperature, relative molecular weight and melting flow rate were basically the same. The two kinds of LLDPE powder had a strong sense of particles, and agglomeration polyethylene resulted from the fine particles melting and bonding into a block, which contained the bubble structure of gas wrapped in the polymer melt. The agglomeration formation was mainly due to the dual action of particle electrostatic adsorption of the diffusion segment and butene insertion to reduce the melting temperature of polyethylene.
参考文献/References
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更新日期/Last Update:
2024-07-10