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Preparation and Properties of Waterborne Polyurethane Containing Fluorenyl
Received:August 20, 2021  
DOI：10.11980/j.issn.0254-508X.2022.02.007
Key Words:bisphenol fluorene  9,9-bis［4-(2-hydroxyethoxy)phenyl］ fluorene  waterborne polyurethane  heat resistance  mechanical properties
Fund Project:陕西省教育厅重点实验室计划项目（17JSO11）。
Author NameAffiliationPostcode
ZHAO Yanna* Shaanxi Key Lab of Chemical Additives for Industry， Shaanxi University of Science & Technology， Xi’an， Shaanxi Province， 710021 710021
XUE Yuyu Shaanxi Key Lab of Chemical Additives for Industry， Shaanxi University of Science & Technology， Xi’an， Shaanxi Province， 710021 710021
ZHANG Ting Shaanxi Key Lab of Chemical Additives for Industry， Shaanxi University of Science & Technology， Xi’an， Shaanxi Province， 710021 710021
NIU Yuhua Shaanxi Key Lab of Chemical Additives for Industry， Shaanxi University of Science & Technology， Xi’an， Shaanxi Province， 710021 710021
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Abstract:The modified waterborne polyurethane emulsions（WPUS and GWPUS）were prepared by modifying the waterborne polyurethane pre-polymers which were synthesized with poly（caprolactone glycol）（PCL2000）and isophorone diisocyanate（IPDI）as raw materials， dihydroxy methyl propionic acid（DMPA）as hydrophilic chain extender， and bisphenol fluorine （BPFL） and self-made 9，9-［4-(2-hydroxyethoxy)phenyl］ fluorine as modifiers， respectively. The structure and properties of the waterborne polyurethane film were characterized. The results shown that compared with WPU， the maximum tensile strength of WPUS and GWPUS films were 42.54 MPa and 32.82 MPa， the maximum elongation at break were 711.83% and 586.95%， and water resistance increased by 32.58% and 45.81%， respectively. When the film was 90% decomposed， compared with WPU film， the decomposition temperature of WPUS and GWPUS film increased by 33.16% and 54.38%， respectively. After surface sizing， compared with WPU paper， the folding endurance of unaged WPUS and GWPUS papers increased by 37 and 41 times while that of the aged counterparts increased by 14 and 19 times ； the tensile strength of unaged WPUS and GWPUS papers increased by 33.57% and 40.82%， while that of the aged counterparts increased by 24.20% and 33.24%.
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