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

Abstract

The thermal- and mechanical-properties and optical transparency of the copoly(amide imide) films with different BPA monomer contents were investigated.

Colorless and transparent poly(amide imide) nanocomposites containing organically modified hectorite

“…TFAB was synthesized using a multistep method, according to our previously published method. 37 2.3 Synthesis of CPAI hybrid lms using STN CPAI hybrid lms were obtained via a two-step synthesis method. The detailed synthesis method is as follows: TFAB (10.34 g, 1.85 × 10 −2 mol) was dissolved in DMAc (30 mL) and stirred at 0 °C for 1 h under nitrogen.…”

“…If a PAI nanocomposite that can improve the high heat resistance and optical properties of PAI is developed using a small amount of nano filler, it can be widely used in various electronic materials including the flexible display field. 37,38…”

“…If a PAI nanocomposite that can improve the high heat resistance and optical properties of PAI is developed using a small amount of nano ller, it can be widely used in various electronic materials including the exible display eld. 37,38 When using monomers frequently used for CPI, the poor thermal properties of CPI can be slightly improved; however, improving the original low CPI thermal properties is limited. Therefore, synthesizing special monomers with better thermomechanical properties while maintaining the existing optical transparency is essential.…”

“…39,40 Simultaneously, an amine monomer of N,N ′ -2,2 ′ -bis(triuoromethyl)-4,4 ′ -biphenylene-bis (4-aminobenzamide) (TFAB) containing 2,2 ′ -bis(triuoro-methyl) benzidine (TFB) moiety was directly synthesized to improve thermomechanical properties while maintaining the optical transparency of existing CPAI. 37 In addition, because the amide functional group present in TFAB can form hydrogen bonds with the hydrophilic clay, it signicantly affects the clay dispersion in the matrix.…”

Effect of organoclay on the physical properties of colorless and transparent copoly(amide imide) nanocomposites

“…26,27 Therefore, a colorless and transparent copoly(amide imide) (Co-CPAI) was synthesized using a number of monomers with rigid structures to improve the thermomechanical properties of CPI while maintaining its transparency. [28][29][30] In this study, we hypothesized that the introduction of an amide group to a monomer containing -CF 3 substituents during the synthesis of Co-CPAI will lead to improvements in thermomechanical properties owing to interchain hydrogen bonding within the Co-CPAI chains. To improve the physical properties of CPI while maintaining its optical transparency, we synthesized a new N,N 0 -[2,2 0 -bis(triuoromethyl)-4,4 0 -biphenylene]bis(aminobenzamide) (TFAB) diamine monomer structure containing an amide group using the 2,2 0 -bis(triuoromethyl) benzidine (TFB) portion of CPI.…”