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Morphologies of extended-chain crystals with different characteristics, i.e. wedge-shaped crystals, bent crystals and wedge-shaped bent crystals, were disclosed with scanning electron microscopy (SEM) and atomic force microscope (AFM) in the high-pressure crystallized poly (ethylene terephthalate)/bisphenol-A polycarbonate (PET-PC) blends. The observations revealed that the thickening growth for the large polyester extended-chain single crystals should first undergo the nucleation step leading to the folded-chain nuclei, and then, the chain extension process which is an isothermal thickening resulting from transesterification and sliding diffusion. The morphological structures shed light on the fundamental nature of the large single crystals in the blends, which may be instructive to grow such large crystals in similar polymer systems.

, authors=Jun LÜ1, 2, Rui HUANG2, Liang-Bin LI3, authorsList=Jun LÜ, Rui HUANG, Liang-Bin LI, authorCompany=null, correspAuthors=null, authorNote=null, correspAuthorsNote=null, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, fund=null), CN=ArticleExt(id=1322983226653942641, articleId=1322983226179986287, tenantId=1146029695717560320, journalId=1255847867265597444, language=CN, title=聚对苯二甲酸乙二醇酯-双酚A型聚碳酸酯共混体系中聚合物伸直链晶体的形态分析, columnId=0, journalTitle=高压物理学报, columnName=, runingTitle=null, highlight=null, articleAbstract=

利用扫描电子显微镜(SEM)和原子力显微镜(AFM)等表征手段,研究了聚对苯二甲酸乙二醇酯-双酚A型聚碳酸酯(PET-PC)共混物的高压结晶样品。研究发现共混体系中存在具备不同形态特征的伸直链晶体,其中包括楔形晶体、弯曲晶体以及楔形弯曲晶体。通过对这些晶体的形态观察,揭示出体系中大尺寸聚酯伸直链单晶体的增厚生长首先要经历形成折叠链晶核的成核阶段,然后才是在酯交换反应和链滑移扩散两种机制共同作用下的等温增厚的链伸展过程。有助于深入理解PET-PC共混物中伸直链单晶体生长过程的本质因素,以便在类似聚合物体系中合成大尺寸的同类晶体。

, authors=吕军1, 2, 黄锐2, 李良彬3, authorsList=吕军, 黄锐, 李良彬, authorCompany=null, correspAuthors=null, authorNote=

吕军(1971—),男,博士,副教授,韩国Chonnam National Univeristy博士后研究员. 主要从事高分子物理与高分子材料方面研究. E-mail:

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吕军(1971—),男,博士,副教授,韩国Chonnam National Univeristy博士后研究员. 主要从事高分子物理与高分子材料方面研究. E-mail:

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聚对苯二甲酸乙二醇酯-双酚A型聚碳酸酯共混体系中聚合物伸直链晶体的形态分析
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吕军 1, 2 , 黄锐 2 , 李良彬 3
高压物理学报 | 2010,24(1): 6-14
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高压物理学报 | 2010 , 24 (1) : 6 -14
聚对苯二甲酸乙二醇酯-双酚A型聚碳酸酯共混体系中聚合物伸直链晶体的形态分析
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吕军1, 2 , 黄锐2, 李良彬3
作者信息
  • 1.西南交通大学材料科学与工程学院材料先进技术教育部重点实验室,四川 成都 610031
  • 2.四川大学高分子科学与工程学院,四川 成都 610065
  • 3.中国科技大学合肥国家同步辐射实验室,安徽 合肥 230026
作者简介:

吕军(1971—),男,博士,副教授,韩国Chonnam National Univeristy博士后研究员. 主要从事高分子物理与高分子材料方面研究. E-mail:

Morphology Investigation of the Extended-Chain Crystals in High-Pressure Crystallized Poly (Ethylene Terephthalate)-(Bisphenol-A) Polycarbonate Blends
Jun LÜ1, 2 , Rui HUANG2, Liang-Bin LI3
Affiliations
  • 1.Key Laboratory of Advanced Technologies of Materials, Ministry of Education, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, China
  • 2.College of Polymer Materials Science and Engineering, Sichuan University, Chengdu 610065, China
  • 3.National Synchrotron Radiation Lab and Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei 230026, China
出版时间: 2010-02-15
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利用扫描电子显微镜(SEM)和原子力显微镜(AFM)等表征手段,研究了聚对苯二甲酸乙二醇酯-双酚A型聚碳酸酯(PET-PC)共混物的高压结晶样品。研究发现共混体系中存在具备不同形态特征的伸直链晶体,其中包括楔形晶体、弯曲晶体以及楔形弯曲晶体。通过对这些晶体的形态观察,揭示出体系中大尺寸聚酯伸直链单晶体的增厚生长首先要经历形成折叠链晶核的成核阶段,然后才是在酯交换反应和链滑移扩散两种机制共同作用下的等温增厚的链伸展过程。有助于深入理解PET-PC共混物中伸直链单晶体生长过程的本质因素,以便在类似聚合物体系中合成大尺寸的同类晶体。

晶体形态  /  伸直链晶体  /  高压  /  熔体生长  /  聚合物

Morphologies of extended-chain crystals with different characteristics, i.e. wedge-shaped crystals, bent crystals and wedge-shaped bent crystals, were disclosed with scanning electron microscopy (SEM) and atomic force microscope (AFM) in the high-pressure crystallized poly (ethylene terephthalate)/bisphenol-A polycarbonate (PET-PC) blends. The observations revealed that the thickening growth for the large polyester extended-chain single crystals should first undergo the nucleation step leading to the folded-chain nuclei, and then, the chain extension process which is an isothermal thickening resulting from transesterification and sliding diffusion. The morphological structures shed light on the fundamental nature of the large single crystals in the blends, which may be instructive to grow such large crystals in similar polymer systems.

crystal morphology  /  extended-chain crystal  /  high pressure  /  melt growth  /  polymer
吕军, 黄锐, 李良彬. 聚对苯二甲酸乙二醇酯-双酚A型聚碳酸酯共混体系中聚合物伸直链晶体的形态分析. 高压物理学报, 2010 , 24 (1) : 6 -14 .
Jun LÜ, Rui HUANG, Liang-Bin LI. Morphology Investigation of the Extended-Chain Crystals in High-Pressure Crystallized Poly (Ethylene Terephthalate)-(Bisphenol-A) Polycarbonate Blends[J]. Chinese Journal of High Pressure Physics, 2010 , 24 (1) : 6 -14 .
  • 国家自然科学基金资助(50973089)
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  • 接收时间:2009-01-20
  • 首发时间:2026-10-30
  • 出版时间:2010-02-15
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  • 收稿日期:2009-01-20
  • 修回日期:2009-09-30
基金
国家自然科学基金资助(50973089)
作者信息
    1.西南交通大学材料科学与工程学院材料先进技术教育部重点实验室,四川 成都 610031
    2.四川大学高分子科学与工程学院,四川 成都 610065
    3.中国科技大学合肥国家同步辐射实验室,安徽 合肥 230026
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2种不同金属材料的力学参数
科
Family
属数
Number of
genus
种数
Number of
species
占总种数比例
Percentage of
total species (%)
属
Genus
种数
Number of
species
占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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