Mechanically robust, creep resistant, intrinsic antibacterial and reprocessable dynamic polyurethane networks based on Azine moiety

2022 ◽  
Author(s):  
Jinshi Han ◽  
Yawei Zhou ◽  
Guanghang Bai ◽  
Wei Wei ◽  
Xiaoya Liu ◽  
...  
Keyword(s):  
Polyurethane Networks

Thermoset polyurethanes have been applied in various fields by virtue of their outstanding properties. However, the thermosets can not be recycled due to their permanent crosslinking structure, which exerted detrimental...

scholarly journals Recyclable Self-Healing Polyurethane Cross-Linked by Alkyl Diselenide with Enhanced Mechanical Properties

Polymers ◽  
2019 ◽  
Vol 11 (5) ◽  
pp. 773 ◽  
Author(s):  
Yuqing Qian ◽  
Xiaowei An ◽  
Xiaofei Huang ◽  
Xiangqiang Pan ◽  
Jian Zhu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Room Temperature ◽  
Amide Bond ◽  
Self Healing ◽  
Healing Efficiency ◽  
Polyurethane Networks ◽  
Combined Action ◽  
Cross Linker ◽  
Dynamic Structures ◽  
External Interventions

Dynamic structures containing polymers can behave as thermosets at room temperature while maintaining good mechanical properties, showing good reprocessability, repairability, and recyclability. In this work, alkyl diselenide is effectively used as a dynamic cross-linker for the design of self-healing poly(urea–urethane) elastomers, which show quantitative healing efficiency at room temperature, without the need for any catalysts or external interventions. Due to the combined action of the urea bond and amide bond, the material has better mechanical properties. We also compared the self-healing effect of alkyl diselenide-based polyurethanes and alkyl disulfide-based polyurethanes. The alkyl diselenide has been incorporated into polyurethane networks using a para-substituted amine diphenyl alkyl diselenide. The resulting materials not only exhibit faster self-healing properties than the corresponding disulfide-based materials, but also show the ability to be processed at temperatures as low as 60 °C.

scholarly journals Studies of the molecular dynamics in polyurethane networks with hyperbranched crosslinkers of different coordination numbers

2007 ◽  
Vol 105 (1) ◽  
pp. 89-98 ◽  
Author(s):  
Przemyslaw Czech ◽  
Lidia Okrasa ◽  
Jacek Ulanski ◽  
Gisele Boiteux ◽  
Francoise Mechin ◽  
...  
Keyword(s):  
Molecular Dynamics ◽  
Coordination Numbers ◽  
Polyurethane Networks

Synthesis and properties of polyurethane networks derived from new soybean oil-based polyol and a bulky blocked polyisocyanate

2008 ◽  
Vol 57 (12) ◽  
pp. 1385-1394 ◽  
Author(s):  
Mehrdad Jalilian ◽  
Hamid Yeganeh ◽  
Mehdi Nekoomanesh Haghighi
Keyword(s):  
Soybean Oil ◽  
Polyurethane Networks

Elastomeric Conductive Ipn From Polyaniline And Fullerene-Based Networks

1995 ◽  
Vol 413 ◽  
Author(s):  
Lee Y. Wang ◽  
Long Y. Chiang ◽  
C. S. Kuo ◽  
J. G. Lin ◽  
C. Y. Huang
Keyword(s):  
Ammonium Persulfate ◽  
Cross Linking ◽  
Synthetic Method ◽  
Near Surface ◽  
Bulk Properties ◽  
Ambient Temperatures ◽  
Polyurethane Networks ◽  
New Material ◽  
Conductive Polyaniline ◽  
Polyhydroxylated Fullerenes

ABSTRACTPolyhydroxylated fullerenes were utilized as an efficient hyper cross-linking agent in the synthesis of polyurethane networks. The resultant elastomers exhibited greatly enhanced thermal stability in comparison with those of the corresponding linear polyurethane and analogous elastomers, which were cross-linked by 1,1,1- tris(hydroxymethyl)ethane. A synthetic method leading to the preparation of a thin layer of conductive polyaniline/polyurethane IPN at the near surface of a fullerenol- based elastomeric substrate was demonstrated, using aqueous ammonium persulfate as an oxidizing agent in the presence of HCI. This new material exhibits a conductivity of 2.0 S/cm at ambient temperatures with the retention of most bulk properties of the parent elastomer, such as elongation and tensile strength at break.

Soybean oil-based polyurethane networks as candidate biomaterials: Synthesis and biocompatibility

2012 ◽  
Vol 114 (10) ◽  
pp. 1165-1174 ◽  
Author(s):  
Shida Miao ◽  
Lijing Sun ◽  
Ping Wang ◽  
Ruina Liu ◽  
Zhiguo Su ◽  
...  
Keyword(s):  
Soybean Oil ◽  
Polyurethane Networks

Characterization of Polyurethane Networks

1981 ◽  
pp. 373-381
Author(s):  
B. ERSHAGHI ◽  
A. J. CHOMPFF ◽  
R. SALOVEY
Keyword(s):  
Polyurethane Networks

Tannic acid derived non-isocyanate polyurethane networks: Synthesis, curing kinetics, antioxidizing activity and cell viability

2018 ◽  
Vol 664 ◽  
pp. 64-72 ◽  
Author(s):  
N. Esmaeili ◽  
M.J. Zohuriaan-Mehr ◽  
A. Salimi ◽  
M. Vafayan ◽  
W. Meyer
Keyword(s):  
Cell Viability ◽  
Tannic Acid ◽  
Curing Kinetics ◽  
Polyurethane Networks
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