[1]闫晓丽段培 张磊 魏丽乔 许并社.多壁碳纳米管/聚碳酸酯复合材料玻璃化转变温度的研究[J].中国材料进展,2015,(5):016-20.[doi:10.7502/j.issn.1674-3962.2015.05.05]
 Yan Xiaoli,Duan Pei,Zhang Lei,et al.Investigation of the glass transition of polycarbonate/multi-Walled carbon nanotube composites[J].MATERIALS CHINA,2015,(5):016-20.[doi:10.7502/j.issn.1674-3962.2015.05.05]
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多壁碳纳米管/聚碳酸酯复合材料玻璃化转变温度的研究()
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中国材料进展[ISSN:1674-3962/CN:61-1473/TG]

卷:
期数:
2015年第5期
页码:
016-20
栏目:
特约研究论文
出版日期:
2015-05-31

文章信息/Info

Title:
Investigation of the glass transition of polycarbonate/multi-Walled carbon nanotube composites
作者:
闫晓丽12段培12 张磊13 魏丽乔13 许并社12
1. 太原理工大学新材料界面科学与工程教育部重点实验室,山西 太原 030024 ;2. 太原理工大学新材料工程技术研究中心,山西 太原 030024 ;3. 太原理工大学材料科学与工程学院,山西 太原 030024
Author(s):
Yan Xiaoli12 Duan Pei12 Zhang Lei13 Wei Liqiao1 3 Xu Bingshe12
1. Key Laboratory of Interface Science and Engineering in Advanced Materials (Taiyuan University of Technology), Ministry of Education, Taiyuan, Shanxi 030024, PR China 2. Research Center of Advanced Materials Science and Technology, Taiyuan University of Technology, Taiyuan, Shanxi 030024, PR China 3. College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan, Shanxi 030024, PR China
关键词:
碳纳米管正电子湮没寿命玻璃化转变温度
DOI:
10.7502/j.issn.1674-3962.2015.05.05
文献标志码:
A
摘要:
碳纳米管(CNTs)自发现以来,由于其优异的物理、化学性能等使其在很多领域都有潜在的应用价值,尤其是作为高分子材料改性填料而备受关注。但到目前为止,CNTs填充对复合材料宏观性能影响的微观机理还不清楚,CNTs的加入对聚合物的微观结构产生什么样的影响,而微观结构又如何影响复合材料的宏观性能等,仍然是有待深入研究的重要课题。本文采用溶液共混-共沉淀的方法制备了聚碳酸酯(PC)/多壁碳纳米管(MWCNTs)复合材料。利用正电子湮没寿命谱仪研究了自由体积随温度的变化。利用三种不同的实验方法:正电子湮没寿命谱测量、动态力学热分析测量和示差扫描量热测量得到了复合材料变化趋势一致的玻璃化转变温度(Tg),都是随着碳纳米管含量的增加而降低。
Abstract:
Since carbon nanotubes (CNTs) were first discovered in 1990, due to its excellent physical properties, it has become a potential material in many fields, especially in the field of polymers filled with CNTs, which have been received increasing attentions. Although significant progress in mechanical, thermal, electrical and rheological properties has been made in developing nanocomposites with different polymer matrices, a general understanding for the mechanism has not yet emerged. In other words, how the addition of nanofillers can affect the microstructure of polymer? And how the microstructures can affect the macropropeties? A major direction in the further development of nanocomposites is finding out the simple structure-property relationship. In this report, polycarbonate (PC)/multi-walled carbon nanotube (MWCNT) composites have been prepared by solution mixing. The influences of temperature on the free volume of MWCNT/PC composites were investigated by positron annihilation lifetime spectroscopy (PALS). Three methods, including PALS, dynamic mechanical analysis and differential scanning calorimetry were used to determine the glass transition temperature (Tg) of PC/MWCNT composites. The experimental results indicated that the higher the MWCNT contents, the lower the Tg, which attributes to the large free volume hole and the enhanced polymer mobility in PC/MWCNT composites with higher MWCNT contents.
更新日期/Last Update: 2015-04-29