https://espace.library.uq.edu.au/view/UQ:08f48a6/UQ08f48a6_OA.pdf

Degradation and stabilization of polyurethane elastomers

Tuning nanophase separation behavior in segmented polyhydroxyurethane via judicious choice of soft segment

In order to design and fabricate hydrophobic, durable and anti-icing coating for aircraft, a polyurethane elastomer matrix was hydrophobically modified and incorporated with fluorinated SiO2 nanoparticles to prepare a micro/nanostructured coating. The micro/nanostructured coating with low surface energy displayed significantly improved mechanical properties and hydrophobicity, which exhibited the water contact angle of 162° as well as the sliding angle of 2°. The coating is highly stretchable, which could sustain large-scale extension, and exhibits tensile strength and elongation at break up to 16.22 MPa and 385%, respectively. Furthermore, the coating exhibited a remarkably weak ice adhesion strength of 14.33 kPa, on which the accumulative ice is prone to fall off under natural wind and its own weight. The coating sustained long-term superhydrophobic properties and anti-icing performance even after 1000 abrasion cycles. The proposed method for the production of scalable superhydrophobic coating is cost-effective and can be applied in aerospace and automotive anti-icing systems.

Fabrication of a durable anti-icing composite coating based on polyurethane elastomer and silica nanoparticles

The invention relates to a preparation method of a functional telechelic polymer with controllable double-bond content of a main chain, and particularly relates to a preparation method of a telechelic polymer with terminal hydroxyl. The preparation method is characterized in that double bonds on a molecule main chain of hydroxyl-terminated polybutadiene are hydrogenated by using trisrhodium chloride, and then through condition control, a telechelic polymer with controllable double-bond content of the main chain is obtained; the hydroxyl-terminated polybutadiene is dissolved in dimethylbenzene in a proportion of 12.5-50%, and then reaction is carried out for 2-10 h under the conditions that the pressure is 0.5-3.0 MPa and the temperature is 70-150 DEG C, wherein the application amount of a catalyst is 0.5-1.5%, and the application amount of triphenylphosphine is 1-4 times as large as that of the catalyst. The preparation method disclosed by the invention has the advantages that a controllable double-bond containing functional telechelic polymer is prepared by using a hydrogenation and modification method, and the method has a main advantage that the double-bond content of a molecule chain of the functional telechelic polymer can be controlled as required through changing experiment conditions.

Preparation method of functional telechelic polymer with controllable double-bond content of main chain

Preparation method and hydrogenation application of immobilized catalyst

A hydrogenated hydroxy-terminated butadiene–acrylonitrile copolymer (HHTBN)-based polyurethane elastomer (PUE) was prepared by using HHTBN as the soft segments in a casting method. The HHTBN-based PUE exhibited improved mechanical properties and aging resistance.

A hydrogenated hydroxy-terminated butadiene–acrylonitrile copolymer-based polyurethane elastomer with improved mechanical properties and aging resistance

The invention relates to a process for hydrogenating liquid acrylonitrile butadiene, in particular to a process for hydrogenating liquid acrylonitrile butadiene containing a terminal hydroxyl group. The process is characterized in that: the used liquid acrylonitrile butadiene containing the terminal hydroxyl group is a polymer prepared by protecting a hydroxyl group with hexamethyldisilazane; theprotected liquid acrylonitrile butadiene containing the terminal hydroxyl group is prepared into a solution with a certain concentration, and is subjected to a hydrogenation reaction under the pressure 0.6-3.0Mpa and at the temperature 80-150 DEG C for 2-12 hours; and the using amount of a catalyst is 0.2-2.4 percent. The process has the advantages: the hydrogenated polymer is a novel polymer of which the hydrogenation degree can be over 90 percent. In the invention, rhodium chloride trihydrate is taken as a catalyst. The process has the advantages of stable catalyst performance, simple adding way, reduction in complex operating steps caused by the operation of other hydrogenation catalysts under nitrogen protection, simplified hydrogenation process and easiness in realizing large-scale industrial continuous production.

Process for hydrogenating liquid acrylonitrile butadiene containing terminal hydroxyl group

The invention provides a preparation method for hydrophilic aminated hydrogenated butadiene-acrylonitrile rubber. The method comprises the steps that 1, a nanometer Rh metal catalyst and butadiene-acrylonitrile rubber are mixed and dispersed evenly; 2, mixed liquid obtained in the step 1 is added in a reaction kettle, and first-step catalytic hydrogenation is performed under the hydrogen pressure of 1-5 MPa; 3, a RhCl(PPh3)3 catalyst with the mass fraction of 0.5-2.0% is added in a catalytic hydrogenation reaction product, and reacting is performed for 1-3 h under the hydrogen pressure of 1-5 MPa. The invention further provides the hydrophilic aminated hydrogenated butadiene-acrylonitrile rubber prepared through the preparation method. The prepared aminated hydrogenated butadiene-acrylonitrile rubber has the good hydrophilicity, and the hydrophilicity of the aminated hydrogenated butadiene-acrylonitrile rubber is improved along with increasing of the amino group content; existence of amino groups in the aminated hydrogenated butadiene-acrylonitrile rubber supplies active sites to introduction of organic matter containing carboxyl groups and epoxy groups.

Preparation method for hydrophilic aminated hydrogenated butadiene-acrylonitrile rubber and prepared product

Hydrogenation method for activation of hydroxy-terminated butyronitrile catalyst

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