A system for fabricating a part, the system (10, 80) comprising: one or more dispensers (48, 50, 110, 112) each comprising a reservoir, wherein each reservoir comprises a polycarbonate precursor solution comprising a polycarbonate precursor compound; print heads (18, 20, 88, 90) configured to selectively print one or more droplets (34, 36, 94, 98) formed of one or more polycarbonate precursor solutions onto each of one or more target locations (26, 96) on a substrate (16, 84) within a build area to form one or more reactive mixture droplets (44, 100) at each of the one or more target locations (26, 96); and an environmental system configured to expose the reactive mixture droplets (44, 100) to at least one of a selected pressure and a selected temperature to polymerize one or more polycarbonate precursor compounds to form a polycarbonate, wherein each of the selected pressure and the selected temperature are different than a respective ambient pressure and ambient temperature, wherein the polycarbonate precursor compound comprises one or more carbonate compounds that are reactive toward transesterification reaction and one or more dihydroxy compounds, and wherein the print heads (18, 20, 88, 90) comprise, a first print head (18, 88) configured to selectively print one or more first droplets (34, 94) of a first solution comprising one or more carbonate compounds that are reactive toward transesterification reaction onto each of one or more target locations (26, 96) on a substrate (16, 84) within the build area; and a second print head (20, 90) configured to selectively print one or more second droplets (36, 98) of a second solution comprising one or more dihydroxy compounds onto each of one or more target locations (26, 96) on the substrate (16, 84) so that one or more first droplets (34, 94) of the first solution and one or more second droplets (36, 98) of the second solution combine to form a reactive mixture droplet (44, 100) at each of the target locations (26, 96). one or more dispensers (48, 50, 110, 112) each comprising a reservoir, wherein each reservoir comprises a polycarbonate precursor solution comprising a polycarbonate precursor compound; print heads (18, 20, 88, 90) configured to selectively print one or more droplets (34, 36, 94, 98) formed of one or more polycarbonate precursor solutions onto each of one or more target locations (26, 96) on a substrate (16, 84) within a build area to form one or more reactive mixture droplets (44, 100) at each of the one or more target locations (26, 96); and an environmental system configured to expose the reactive mixture droplets (44, 100) to at least one of a selected pressure and a selected temperature to polymerize one or more polycarbonate precursor compounds to form a polycarbonate, wherein each of the selected pressure and the selected temperature are different than a respective ambient pressure and ambient temperature, wherein the polycarbonate precursor compound comprises one or more carbonate compounds that are reactive toward transesterification reaction and one or more dihydroxy compounds, and wherein the print heads (18, 20, 88, 90) comprise, a first print head (18, 88) configured to selectively print one or more first droplets (34, 94) of a first solution comprising one or more carbonate compounds that are reactive toward transesterification reaction onto each of one or more target locations (26, 96) on a substrate (16, 84) within the build area; and a second print head (20, 90) configured to selectively print one or more second droplets (36, 98) of a second solution comprising one or more dihydroxy compounds onto each of one or more target locations (26, 96) on the substrate (16, 84) so that one or more first droplets (34, 94) of the first solution and one or more second droplets (36, 98) of the second solution combine to form a reactive mixture droplet (44, 100) at each of the target locations (26, 96). a first print head (18, 88) configured to selectively print one or more first droplets (34, 94) of a first solution comprising one or more carbonate compounds that are reactive toward transesterification reaction onto each of one or more target locations (26, 96) on a substrate (16, 84) within the build area; and a second print head (20, 90) configured to selectively print one or more second droplets (36, 98) of a second solution comprising one or more dihydroxy compounds onto each of one or more target locations (26, 96) on the substrate (16, 84) so that one or more first droplets (34, 94) of the first solution and one or more second droplets (36, 98) of the second solution combine to form a reactive mixture droplet (44, 100) at each of the target locations (26, 96).