Special Odd-Even Effect of Degree of Oligomerization on Properties of Cyclic Oligoesters

Jun Wu; Tao-guang Qu; Ling-feng Gao; Xiao-ming Yang; Xiao-hong Li; Ying-feng Tu; Xiu-lin Zhu

doi:10.1007/s10118-015-1675-2

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Special Odd-Even Effect of Degree of Oligomerization on Properties of Cyclic Oligoesters

RAPID COMMUNICATION | Updated：2021-06-21

- Special Odd-Even Effect of Degree of Oligomerization on Properties of Cyclic Oligoesters
- Special Odd-Even Effect of Degree of Oligomerization on Properties of Cyclic Oligoesters
- Chinese Journal of Polymer Science 2015年33卷第8期页码：1069-1073
- Affiliations：
  
  Suzhou Key Laboratory of Macromolecular Design and Precision Synthesis, Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
- Author bio：
  
  **Ying-feng Tu (屠迎锋), E-mail: tuyingfeng@suda.edu.cn
- Funds：
  
  National "973" Project(2011CB606004);National Natural Science Foundation of China(21274099;21234005;21474067);Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions
- DOI：10.1007/s10118-015-1675-2
  中图分类号：
- 收稿：2015-04-07，
  
  修回：2015-05-04，
  
  录用：2015-05-07，
  
  纸质出版：2015-08
- Accepted：
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Jun Wu, Tao-guang Qu, Ling-feng Gao, 等. Special Odd-Even Effect of Degree of Oligomerization on Properties of Cyclic Oligoesters[J]. Chinese Journal of Polymer Science, 2015,33(8):1069-1073.

Jun Wu, Tao-guang Qu, Ling-feng Gao, et al. Special Odd-Even Effect of Degree of Oligomerization on Properties of Cyclic Oligoesters[J]. Chinese Journal of Polymer Science, 2015, 33(8): 1069-1073.
Jun Wu, Tao-guang Qu, Ling-feng Gao, 等. Special Odd-Even Effect of Degree of Oligomerization on Properties of Cyclic Oligoesters[J]. Chinese Journal of Polymer Science, 2015,33(8):1069-1073. DOI： 10.1007/s10118-015-1675-2.

Jun Wu, Tao-guang Qu, Ling-feng Gao, et al. Special Odd-Even Effect of Degree of Oligomerization on Properties of Cyclic Oligoesters[J]. Chinese Journal of Polymer Science, 2015, 33(8): 1069-1073. DOI： 10.1007/s10118-015-1675-2.

摘要

Abstract

We demonstrate here seven pure cyclic samples

which belongs to two series of oligoesters

cyclic oligo(trimethylene terephthalate)s (COTTs) and cyclic oligo(butylene terephthalate)s (COBTs)

showing odd-even effect of degree of oligomerization (repeating units number) on properties. The pentamer of COTT and trimer of COBT show much lower melting temperature

and the trimer of COTT and trimer of COBT show significant lower refractive index

which can be ascribed to the low packing density of cyclic oligoesters with odd number of degree of oligomerization. Our results reveal the discrete property change as a function of cyclic size of oligomers

which can be used to design materials with special properties.

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