NDLI: Special odd-even effect of degree of oligomerization on properties of cyclic oligoesters

Content Provider	Springer Nature Link
Author	Wu, Jun Qu, Tao guang Gao, Ling feng Yang, Xiao ming Li, Xiao hong Tu, Ying feng Zhu, Xiu lin
Copyright Year	2015
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.
Starting Page	1069
Ending Page	1073
Page Count	5
File Format	PDF
ISSN	02567679
Journal	Chinese Journal of Polymer Science
Volume Number	33
Issue Number	8
e-ISSN	14396203
Language	English
Publisher	Chinese Chemical Society and Institute of Chemistry, CAS
Publisher Date	2015-06-19
Publisher Place	Beijing
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Cyclic polymer Oligomer Odd-even effect Refractive index Polymer Sciences Industrial Chemistry/Chemical Engineering Characterization and Evaluation of Materials Condensed Matter Physics
Content Type	Text
Resource Type	Article
Subject	Organic Chemistry Chemical Engineering Polymers and Plastics

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