Fabrications and Properties of Colorless Polyimide Films Depending on Various Heat Treatment Conditions via Crosslinkable Monomer

High Transparency and Thermal Stability of Alicyclic Polyimide with Crosslinking Structure by Triallylamine

“…The major difference between the linear ALPI and crosslinkable ALPIs was the area ratio of characteristic peaks C=C to C=O shown in Table 1. The literature [23] indicated when the crosslink degree of PI is increased, the intensity of C=C (705 cm -1 ) of dianhydride beccomes weak. The area ratio (C=C to C=O) of PIN0 and PIN20 were 0.158 and 0.127 indicating the concentration of C=C decreased significantly after free radical polymerization.…”

“…This crosslinked PI system exhibit very high thermal stability and excellent manufacturing performance. phenyl] sulfone (BAPS) followed by heat-treated from 250 o C to 350 o C to enhance the degree of crosslink from 85% to 93% [23]. In this work, ALPI was prepared via one step method of alicyclic dianhydride and aromatic diamine.…”

Effects of diamine isomers on the properties of colorless and transparent copoly(amide imide)s

“…A majority of earlier studies focused on the factors that affect the thermomechanical properties and optical transparencies of PIs, such as the curing conditions, imidization temperature, monomer content, etc. 15,16 Rod-like PIs exhibit better in-plane orientation and improved properties, compared with kinked PIs. 17,18 This effect is most pronounced in PI lms containing p-isomers, and is relatively insig-nicant in those containing m-isomer-type monomers.…”

“…A majority of earlier studies focused on the factors that affect the thermo-mechanical properties and optical transparencies of PIs, such as the curing conditions, imidization temperature, monomer content, etc. 15,16 …”