Photopolymerizable precursor

To date, SiCN materials have been used to make coatings44,50,51, monolithic and extruded shapes52-55, for binder applications44,56, fibers45,57-61 and composite processing44,52,55. Recently, photopolymerizable precursors have been considered for rapid prototyping applications62. 

This chapter will focus on a particular LDW process that employs ultrashort pulsed lasers and photopolymerizable precursors two-photon polymerization (TPP). Also known as two-photon induced photopolymerization and two-photon... 

An imaging system based on photopolymerizable microcapsules has recently been developed (8-101. The microcapsules (Figure 1) contain photoinitiators, acrylic monomers, and a colorless dye precursor. 

FIGURE 54.17 Polymer precursor with photopolymerizable functionality. 

Photopolymerizable systems have received a lot of recent attention in biomaterial applications due to the ability to rapidly form a solid polymer (gel) from a liquid precursor solution (monomer or macromer) with spatial and temporal control under physiological conditions. The development of cytocompatible systems has provided the ability to form materials in the presence of proteins, cells, and tissues to allow for minimally invasive biomaterial-based therapies. In particular, photopolymerizable systems have been used extensively as dental restoratives, controlled microenvironments to study cellular behavior and develop tissue substitutes, and to encapsulate growth fartors and cytokines in a polymer matrix for controlled release applications. 

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