Reaction process in polycarbonate/polyamide bilayer film and blend

Influences of hyperbranched polyethylenimine on the reactive compatibilization of polycarbonate/polyamide blends

“…The PC1 was synthesized in our lab [17] and the PC2 was purchased from SigmaAldrich. The number-averaged molar mass (M n ) and the polydispersity determined by gel permeation chromatography (GPC, Waters 1515) (comparing with polystyrene standard) with tetrahydrofuran as the solvent were 1.8 × 10 4 g/mol and 1.9 for PC1, and 3.8 × 10 4 g/mol and 2.0 for PC2.…”

“…The aPA was synthesized in our lab [17] . The number-averaged molar mass and the polydispersity of the aPA used in this study were determined by GPC (comparing with polystyrene standard) with N,Ndimethyllformamide as the solvent were 1.5 × 10 4 g/mol and 2.0, respectively.…”

“…Thermoplastic blends comprising PC resin and aPA exhibit excellent physical properties [16] . In our previous work, we have investigated the interchange reaction process at the interfaces between PC and an amorphous PA (aPA) in blends and bilayer samples [17] . It has been found that, aminolysis was the main process at 160-180 C with the random attack of amino terminal groups of aPA on the inner carbonate groups of PC, thus the simultaneously scission of PC chains and formation of PC-aPA copolymer chains during the reaction process can improve the compatibility between PC phase and aPA phase.…”

Characterization and Processing Behavior of Heated Aluminum-Polycarbonate Composite Build Plates for the FDM Additive Manufacturing Process

“…Some research has been conducted on the bonding of PC and nylon, however, it was focused on blends and not surface contacts. The main conclusions from the studies reviewed were that PC and nylon could bond together into a copolymer, but this would require a significant amount of time and heat input [81,82]. Since 3-D printing does not involve either very high temperatures or lengthy bonding times, it is unlikely that nylon will bond well with PC; therefore, it is predicted that the nylon will have a weak-to-no bond with the PC print bed.…”

“…This configuration most closely represents the actual use conditions of the materials in question, as it is usually necessary to print these materials inside of an enclosure for successful processing [6,7]. ABS and nylon [8,9] output noxious fumes during the process; ABS and HIPS are very sensitive to warping if the temperature environment is not correct [6][7][8]; and nylon is extremely sensitive to changes in humidity and air currents during processing [81,82]. The other materials do not need to have this kind of special environment, so they are usually printed on open-bed printers.…”