Polyurethanes polyurethane chemistry influences

Furthermore, it is conceivable to use standard chain elongation techniques, e.g., with diisocyanates known from polyurethane chemistry, to adjust the viscosity of the HO-P-OH polymers prior to the derivatization with the isocyanatomethyl-dimethylmonomethoxy silane This of course also influences the mechanical properties of the vulcanizates. 

Many of the authors cited above were not specific about the polyurethanes they used. As we know, the chemistry of the polymethane, its pore size and other factors are important determinants of effectiveness. Some articles did not indicate whether the polymethanes used were hydrophilic or hydrophobic. One clue we found reliable is that if the enzyme of a cell is mixed with a prepolymer, more often than not the polyurethane is hydrophilic. A reticulated foam used for immobilization is typically a hydrophobic polyurethane. It is hoped that this book will influence the research community to be specific about the chemistries of their scaffolds. 

Because there is a large variety of different materials that are excellent for specific applications, the right polyurethane for the particular application has to be selected. The base chemistry used in producing the polyurethane system can have a profound influence on the final properties of the part produced. The mechanical, thermal, and chemical properties of a cured system have to be selected for each application. A typical example is that certain amines cannot be used in applications where there is contact with food. 

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