A REAL-TIME AFM STUDY ON CRYSTAL NUCLEATION AND GROWTH IN NANODROPLETS OF ISOTACTIC POLYPROPYLENE

Jun-chai Zhao; Bo Xing; Zheng Peng; Jian-min Zhang

doi:10.1007/s10118-013-1330-8

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A REAL-TIME AFM STUDY ON CRYSTAL NUCLEATION AND GROWTH IN NANODROPLETS OF ISOTACTIC POLYPROPYLENE

Special Issue: In Memory of Prof. Bingzheng Jiang | Updated：2023-01-03

- A REAL-TIME AFM STUDY ON CRYSTAL NUCLEATION AND GROWTH IN NANODROPLETS OF ISOTACTIC POLYPROPYLENE
- Chinese Journal of Polymer Science Vol. 31, Issue 9, Pages: 1310-1320(2013)
- Affiliations：
  
  School of Material Science and Engineering, Shijiazhuang Tiedao University, Shijiazhuang 050043, China
- Author bio：
  
  **Jun-chai Zhao (赵军钗), E-mail: zhaojc@stdu.edu.cn
- Funds：
- DOI：10.1007/s10118-013-1330-8
  CLC：
- Received：31 May 2013，
  
  Revised：2013-06-12，
  
  Accepted：21 June 2013，
  
  Published：2013-09
- Accepted：
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Jun-chai Zhao, Bo Xing, Zheng Peng, et al. A REAL-TIME AFM STUDY ON CRYSTAL NUCLEATION AND GROWTH IN NANODROPLETS OF ISOTACTIC POLYPROPYLENE[J]. Chinese Journal of Polymer Science, 2013, 31(9): 1310-1320.
DOI：

Jun-chai Zhao, Bo Xing, Zheng Peng, et al. A REAL-TIME AFM STUDY ON CRYSTAL NUCLEATION AND GROWTH IN NANODROPLETS OF ISOTACTIC POLYPROPYLENE[J]. Chinese Journal of Polymer Science, 2013, 31(9): 1310-1320. DOI： 10.1007/s10118-013-1330-8.

摘要

Abstract

Isotactic polypropylene (

PP) nanodroplets were prepared by using the classical droplet method in this study. The formation of nanodroplets allowed the controlled observation of polymer nucleation as well as access to crystal growth at exceptionally high supercooling in

PP. Three cases including the heterogeneous nucleation and fast crystallization in

PP droplets

the formation of multiple independent homogeneous nuclei within a single droplet and a single nucleus within a single droplet were detected by using atomic force microscopy (AFM) during gradually cooling after remelting the nanodroplets. Moreover

it is found that when the volume of droplet is larger than the value of

. 130000 nm

the first case was observed. Otherwise

the latter two cases appeared. The temperature at which the onset of nucleation was observed in individual droplets was found to be mainly dependent on height of the droplets when the size scale of the droplet is comparable to the size of the critical nucleus in at least one dimension

which indicates the nucleation behavior under confinement.

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