检索结果-南通市图书馆

Observation of banded spherulites and lamellar structures by atomic force microscopy

Science China Chemistry 2003年第2期46卷 152-159页

作者：姜勇罗艳红范泽夫王霞瑜徐军郭宝华李林 State Key Laboratory of Polymer Physics and Chemistry Center for Molecular Science Institute of Chemistry Chinese Academy of Sciences Graduate School of the Chinese Academy of Sciences Beijing 100039 China ChinaInstitute of Polymer Science and Engineering Xiangtan University Institute of Polymer Science & Engineering Department of Chemical Engineering School of Materials Science & Engineering Tsinghua Universit

Lamellar structures of banded spherulites of poly(e-caprolactone)/poly(vinylchloride) (PCL/PVC) blends are observed using tapping mode atomic force microscopy (AFM). Thesurface of the PCL/PVC banded spherulites presents to be concentric periodic ups and downs. Theperiod of the bands corresponds to the extinction rings under the polarized optical microscopyobservation. The lamellae with edge-on orientation in the ridges and the flat-on lamellae in thevalleys of the banded spherulites are observed clearly. The twisting between the edge-on and flat-onlamellae is also observed.

关键词： atomic force microscopy banded spherulites lamellar twisting poly(E-caprolactone) (PCL) poly(vinyl chloride) (PVC)

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Study on the crystal morphology and melting behavior of isothermally crystallized composites of short carbon fiber and poly(trimethylene terephthalate)

引用

Frontiers of Chemical Science and Engineering 2009年第3期3卷 255-264页

作者： Mingtao RUN Hongzan SONG Yanping HAO College of Chemistry&Environmental Science Hebei UniversityBaoding 071002China College of Economics Hebei UniversityBaoding 071002China

The spherulites of the short carbon fiber(SCF)/poly(trimethyleneterephthalate)(PTT)compositesformedin limited space at designed temperatures,and their melting behaviors were studied by the polarized optical microscopy,atomic force microscopy(AFM),and scanning electron microscopy(SEM),*** results suggest that SCF content,isothermal crystallization temperatures,and the film thicknesses influence the crystal morphology of the *** dimension of the spherulites is decreased with increasing SCF content,but whether banded or nonbanded spherulites will form in the composites is not dependent on SCF ***,the crystal morphology of the composites depends strongly on the *** the isothermal crystallization temperatures increase from 180℃ to 230℃,the crystal morphology of SCF/PTT composites continuously changes in the following order:nonbanded→banded→nonbanded ***-nuous circle lines form in the film when the film thickness increases from 30 to 60μ*** on the SEM observation,it is found that these circle lines are cracks formed due to the constriction difference of the different parts of the *** cracks are formed when the film is cooled from the isothermal crystallization temperature to the room tempera-ture at a slow cooling rate;while they will disappear gradually at different temperatures in the heating *** crack will appear/disappear first around the center of the spherulite when the film was cooled/*** nontwisted or slightly twisted lamellas will reorganize to form highly twisted lamellas inducing apparent banded texture of the spherulites.

关键词： poly(trimethylene terephthalate) short carbon fiber banded spherulites crack

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：