In 2000-2001 the specialists of TsAGI and ILIT of the Russian Academy of Sciences developed the photopolymeric molds and tried up the technology of producing in these molds the wing tips of a complicated shape made of composite materials. During further development a complicated hybrid structure of a balance aerodynamic model was generated including primary metallic elements, contour-forming elements made of composites as well as separate contour-forming elements made directly from photopolymer. Prospects for extending this technology to dynamic and elastic models are considered.*

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ч ы а:, , , .The paper reports on the technological features of using the multicomponent photocurable resins by the example of a new resin I LIT-4 to achieve the best characteristics of the cured parts. It was found that repeated drawing of the layer with a proportional increase in the speed of drawing thin spots of the part improves the physical and mechanical characteristics.

The model of crosslinking polymerization in photopolymer for laser stereolithography has been proposed. The feature of this polymerization is that the initiation takes place by an irradiation with single pulse that should be enough to solidify the chosen parts of photopolymer. It is shown that despite of such initiation the polymerization passes the gel point due to the fast forming and crosslinking of polyradicals resulting in gel macromolecules. The influence of different factors (termination, trapping, crosslinking, cyclization) on position of the gel point is investigated. Branched level of macromolecules formed during polymerization is found to be mainly dependent on the rate of cyclization.