Hexamethylene diisocyanate hydroxyethyl methacrylate

The internal cross-linking of styrene copolymers is dealt with in the chapter of R. N. Haward, B. M. Parker and E. F. T. White, who prepared a copolymer of styrene and hydroxyethyl methacrylate and crosslinked the copolymer with hexamethylene diisocyanate. 

Figure 1. Variation in specific viscosity of a toluene solution of a styrene-hydroxyethyl methacrylate copolymer (2.2 mole % HEM A) on reaction with hexamethylene diisocyanate at 80°C. Polymer concentration 0.047%, (gram/dl.) [NCO] 0 [OH] 0 = 9.5...

Figure 4. Comparison of viscosity changes on reaction between styrene-hydroxyethyl methacrylate copolymer (2.2 mole % HEMA) and butyl isocyanate ( ) and hexamethylene diisocyanate (O) in toluene at 80°C.

Figure 7. Viscosity changes and polymer concentration for the reaction between hexamethylene diisocyanate and sty-rene-hydroxyethyl methacrylate copolymers in toluene at...

Figure 10. Change in viscosity over long times during reaction between styrene-hydroxyethyl methacrylate copolymer and hexamethylene diisocyanate in toluene at 80° C. Curves 1-4 (copolymer 0.7 mole % HEM A, 0.134% (gram/dl.) solution) had [NCO] 0 [O//] 0 = 102, 1.5 X 102, 10s, and 10u, respectively. Curve 5 (copolymer 2.2 mole % HEM A, 0.047% (gram/dl.) solution) had [IVCO]0 [OH]0 = 10. All solutions have approximately the same [OH]0...

Table I. Light Scattering for Styrene—Hydroxyethyl Methacrylate Copolymer (3.8 mole % HEM A) before and after Crosslinking with Hexamethylene Diisocyanate...

In addition, to improve adhesion between polymer matrix and HAp, several copolymer such as PMMA, PBMA, and PHEMA were grafted onto the surface of HAp using isocyanatoethyl methacrylate (ICEM) or hexamethylene diisocyanate (HMDI)/hydroxyethyl methacrylate (HEMA) [100]. These three methacrylate polymers were coupled to HAp particles via covalent bonding with isocyanate groups. 

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