Na WANG, Xiang YU, Xiao-jing ZHANG, Qing-qiao XIE, Peng-fei ZHANG. The Study on Morphology and Structure of Polyoxyethylene-Urea Inclusion Complex Prepared by Co-precipitation[J]. Polymer Bulletin, 2016,29(2):79-85.
Na WANG, Xiang YU, Xiao-jing ZHANG, Qing-qiao XIE, Peng-fei ZHANG. The Study on Morphology and Structure of Polyoxyethylene-Urea Inclusion Complex Prepared by Co-precipitation[J]. Polymer Bulletin, 2016,29(2):79-85. DOI: 10.14028/j.cnki.1003-3726.2016.02.009.
The inclusion comlexes (ICs) is a topic of current interest in supermolecular chemistry. In this paper
urea was taken as host and Polyoxyethylene (PEO) as guest
and the PEO-Urea-ICs (PEOUICs) with different ratio of PEO to Urea were prepared by using co-precipitation method. And then the morphology and structure of PEOUIC were systematically analyzed by utilizing DSC
XRD
SEM and POM. The results show that: firstly
hexagonal and tetragonal PEOUIC can be obtained by co-precipitation method. Secondly
tetragonal PEOUIC is formed when the mass ratio of PEO to Urea is lower than 1
while hexagonal PEOUIC is formed when the mass ratio of PEO to Urea is higher than 1. Thirdly
with increasing of Urea
the melting point of hexagonal PEOUIC increases firstly and then tends to be stable. Fourthly
tetragonal PEOUIC with huge spherulitic morphology can be observed
and hexagonal PEOUIC possesses hexagonal column morphology with protuberant centre.