Figure 1 | Scientific Reports

Figure 1

From: Controllable degradation kinetics of POSS nanoparticle-integrated poly(ε-caprolactone urea)urethane elastomers for tissue engineering applications

Figure 1

(a) Synthesis of the aliphatic poly(ε-caprolactone urea)urethane prepolymer in a 2:1 ratio of 4,4′-methylenebis (cyclohexylisocyanate) to poly(ε -caprolactone)diol. Chain extension reaction of the poly(ε-caprolactone urea)urethane prepolymer with ethylenediamine and integration of POSS nanoparticles as endcapped pendant chains. The final segmented polyurethane consists of urea hard segments linked to poly(ε-caprolactone) soft segment by urethane bonds. (b) 1H nuclear magnetic resonance (NMR) spectrum of a representative POSS-PCLU polyurethane.

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