Studies on Crystal Transition of Polyamide 11 Nanocomposites by Variable-temperature X-Ray Diffraction

Citation: Tian-xi Liu, Dan Chen, In Yee Phang, Chun Wei. Studies on Crystal Transition of Polyamide 11 Nanocomposites by Variable-temperature X-Ray Diffraction[J]. Chinese Journal of Polymer Science, 2014, 32(1): 115-122. doi: 10.1007/s10118-014-1383-3 shu

Studies on Crystal Transition of Polyamide 11 Nanocomposites by Variable-temperature X-Ray Diffraction

1.
1. Key Laboratory of New Processing Technology for Nonferrous Metals and Materials, Ministry of Education, College of Materials Science and Engineering, Guilin University of Technology, Guilin 541004, China
2.
2. State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai 200433, China
3.
4.
State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai 200433, China
5.
Institute of Materials Research and Engineering, ASTAR (Agency for Science, Technology and Research), 3 Research Link, 117602, Singapore
6.
Key Laboratory of New Processing Technology for Nonferrous Metals and Materials, Ministry of Education, College of Materials Science and Engineering, Guilin University of Technology, Guilin 541004, China
基金项目:
This work was financially supported by the National Natural Science Foundation of China (No. 51125011), Guangxi Small Highland Innovation Team of Talents in Colleges and Universities, and Guangxi Funds for Specially-appointed Expert.

摘要: Polyamide 11 (PA11) and its nanocomposites with different organoclay loadings were prepared by melt-compounding and subsequent pelletizing. The crystal phase transitions of PA11 and its clay nanocomposites were investigated by variable-temperature X-ray diffraction. It was found that the Brill transition of the nanocomposite was 20 K higher than that of the neat PA11 for both heating and cooling processes. The PA11 d-spacings of the nanocomposites were observed to be smaller than those of the neat PA11 for melt crystallization. The constraints imposed by the addition of layered clay, restricting the thermal expansion of the polymer chains, are probably responsible for such a reduction of the d-spacing.

关键词:

Polyamide 11
/ Clay
/ Nanocomposites
/ Crystal transition
/ Variable-temperature X-ray diffraction

English

Studies on Crystal Transition of Polyamide 11 Nanocomposites by Variable-temperature X-Ray Diffraction

1.
1. Key Laboratory of New Processing Technology for Nonferrous Metals and Materials, Ministry of Education, College of Materials Science and Engineering, Guilin University of Technology, Guilin 541004, China
2.
2. State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai 200433, China
3.
4.
State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai 200433, China
5.
Institute of Materials Research and Engineering, ASTAR (Agency for Science, Technology and Research), 3 Research Link, 117602, Singapore
6.
Key Laboratory of New Processing Technology for Nonferrous Metals and Materials, Ministry of Education, College of Materials Science and Engineering, Guilin University of Technology, Guilin 541004, China
Received Date: 26 August 2013
Revised Date: 09 October 2013
Available Online: 05 January 2014
Fund Project:
This work was financially supported by the National Natural Science Foundation of China (No. 51125011), Guangxi Small Highland Innovation Team of Talents in Colleges and Universities, and Guangxi Funds for Specially-appointed Expert.

Abstract: Polyamide 11 (PA11) and its nanocomposites with different organoclay loadings were prepared by melt-compounding and subsequent pelletizing. The crystal phase transitions of PA11 and its clay nanocomposites were investigated by variable-temperature X-ray diffraction. It was found that the Brill transition of the nanocomposite was 20 K higher than that of the neat PA11 for both heating and cooling processes. The PA11 d-spacings of the nanocomposites were observed to be smaller than those of the neat PA11 for melt crystallization. The constraints imposed by the addition of layered clay, restricting the thermal expansion of the polymer chains, are probably responsible for such a reduction of the d-spacing.

Key words:

Polyamide 11
/ Clay
/ Nanocomposites
/ Crystal transition
/ Variable-temperature X-ray diffraction

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Studies on Crystal Transition of Polyamide 11 Nanocomposites by Variable-temperature X-Ray Diffraction

English

Studies on Crystal Transition of Polyamide 11 Nanocomposites by Variable-temperature X-Ray Diffraction

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Studies on Crystal Transition of Polyamide 11 Nanocomposites by Variable-temperature X-Ray Diffraction

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