Fabrications and Properties of Colorless Polyimide Films Depending on Various Heat Treatment Conditions via Crosslinkable Monomer
- Authors
- Choi, Il Hwan; Chang, Jin-Hae
- Issue Date
- Sep-2010
- Publisher
- POLYMER SOC KOREA
- Keywords
- colorless Pl; crosslinkable monomer; films
- Citation
- POLYMER-KOREA, v.34, no.5, pp 391 - 397
- Pages
- 7
- Journal Title
- POLYMER-KOREA
- Volume
- 34
- Number
- 5
- Start Page
- 391
- End Page
- 397
- URI
- https://scholarworks.bwise.kr/kumoh/handle/2020.sw.kumoh/26879
- DOI
- 10.7317/pk.2010.34.5.391
- ISSN
- 0379-153X
2234-8077
- Abstract
- Poly (amic acid) (PAA) was prepared by reaction of bicyclo(2,2,2)oct-7-ene-2,3,5,6-tetra-carboxylicdianhydride(BTDA) containing double bond for crosslinking and bis[4-(3-aminophenoxy)phenyl] sulfone(BAPS) in N,N-dimethylacetamide(DMAc). The cast film of PAA was heat-treated at different temperatures to create polyimide (PI) films. With increasing thermal crosslinking temperatures from 250 to 350 degrees C. the thermo-mechanical properties. degree of crosslinking, and optical transparency of the cross-linked PI were investigated. The maximum enhancement in the thermo-mechanical properties was observed at a heat treatment condition of 350 C. However. the optical transparency was found to be optimal for 250 E heat treatment. The degree of crosslinking in NMR was determined to be 85% to 93% with increasing annealing temperature conditions from 250 to 350 degrees C.
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