We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Transparent Polyimide/Organoclay Nanocomposite Films Containing Different Diamine Monomers.
- Authors
Shin, Hyeon Il; Chang, Jin-Hae
- Abstract
Poly (amic acid) s (PAAs) were synthesized using 4,4′-(hexafluoroisopropyl-idene) diphthalic anhydride (6FDA) and two types of diamines—bis(3-aminophenyl) sulfone (BAS) and bis(3-amino-4-hydroxyphenyl) sulfone (BAS-OH). Two series of transparent polyimide (PI) hybrid films were synthesized by solution intercalation polymerization and thermal imidization using various concentrations (from 0 to 1 wt%) of organically modified clay Cloisite 30B in PAA solution. The thermo-mechanical properties, morphology, and optical transparency of the hybrid films were observed. The transmission electronic microscopy (TEM) results showed that some of the clays were agglomerated, but most of them showed dispersed nanoscale clay. The effects of -OH groups on the properties of the two PI hybrids synthesized using BAS and BAS-OH monomers were compared. The BAS PI hybrids were superior to the BAS-OH PI hybrids in terms of thermal stability and optical transparency, but the BAS-OH PI hybrids exhibited higher glass transition temperatures (Tg) and mechanical properties. Analysis of the thermal properties and tensile strength showed that the highest critical concentration of organoclay was 0.50 wt%.
- Subjects
POLYIMIDES; ORGANOCLAY; MONOMERS; GLASS transition temperature; AMIC acids; THERMAL properties
- Publication
Polymers (20734360), 2020, Vol 12, Issue 1, p135
- ISSN
2073-4360
- Publication type
Article
- DOI
10.3390/polym12010135