Preparation and characterization of highly transparent and colorless semi-aromatic polyimide films derived from alicyclic dianhydride and aromatic diamines

Zhai, Lihong; Shen, Yang; Fan, Lin

doi:10.1016/j.polymer.2012.05.047

Cited by 125 publications

(102 citation statements)

References 55 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Polyimides are regarded a suitable candidate for substrate materials because of the desirable properties mentioned above. [4][5][6][7] However, aromatic polyimides have strong intermolecular interactions due to the formation of chargetransfer complexes (CTCs), and thus usually have poor processability, including limited solubility in organic solvents. Aromatic polyimides also show strong absorption in the visible region, making them yellow or brown.…”

mentioning

confidence: 99%

Kinetic study of low‐temperature imidization of poly(amic acid)s and preparation of colorless, transparent polyimide films

Jung

Choi

et al. 2015

J. Polym. Sci. Part A: Polym. Chem.

View full text Add to dashboard Cite

Conventional synthesis of polyimides includes hightemperature (160-350 8C) imidization of poly(amic acid)s. In the present work, imidization has been carried out at much lower temperatures (40-160 8C). 1,2,4,5,-cyclohexanetetracarboxylic dianhydride (HPMDA) or pyromellitic dianhydride (PMDA) was polymerized with an aromatic diamine, 4,4 0 -diaminodiphenylmethane (DDPM), to give poly(amic acid)s, which were then imidized chemically. Imidization was more than 90% complete even at the very low imidization temperature of 40 8C. It was found that the imidization occurs in two steps: an initial rapid cyclization and a subsequent slower cyclization. The activation energy for the rapid process was determined to be 4.3 kJ/mol, and that of the slower process, 4.8 kJ/mol. As the imidization temperature decreases, the transmittance of the resulting polyimides tends to gradually increase, the cutoff wavelength decreases and the color becomes pale. A partially aliphatic polyimide based on HPMDA and DDPM prepared at 40 8C yielded thin films that were highly transparent and colorless, and had good flexibility, solubility and thermal stability. The polyimide films prepared in this study may be good candidates for flexible, transparent plastic substrates in the display industry.

show abstract

mentioning

confidence: 99%

Kinetic study of low‐temperature imidization of poly(amic acid)s and preparation of colorless, transparent polyimide films

Jung

Choi

et al. 2015

J. Polym. Sci. Part A: Polym. Chem.

View full text Add to dashboard Cite

show abstract

“…The good optical transparency of the current PI films is mainly attributed to the asymmetrical alicyclic tetralin structure and the fluorine group in the dianhydride unit. The FTDA-PI films showed yellow index (YI) values of 3.3-21.1, which were much lower than that of all-aromatic PI films, such as Kapton film (YI=108) [16]. Especially, PI-4 film containing both of fluoro substituents in the dianhydride and diamine moieties exhibited a lowest YI value of 3.3 in the series.…”

Section: Optical Propertiesmentioning

confidence: 88%

Synthesis and Properties of Cost-Effective Light-Color and Highly Transparent Polyimide Films from Fluorine-Containing Tetralin Dianhydride and Aromatic Diamines

Zhang

Song

Liu

et al. 2016

J. Photopol. Sci. Technol.

View full text Add to dashboard Cite

A novel fluoro-containing tetralin dianhydride, 3,4-dicarboxy-1,2,3,4-tetrahydro-6-fluoro-1-naphthalene succinic dianhydride (FTDA) was successfully prepared via a cost-effective route with maleic anhydride and p-fluorostyrene as the starting materials. A series of semi-alicyclic polyimides (PIs) have been synthesized from FTDA and aromatic diamines, including 4,4'-oxydianiline (ODA) for PI-a, 1,4-bis(4-aminophenoxy)benzene (APB) for PI-b, 2,2'-bis [(4-aminophenoxy)

show abstract

“…The amorphous structure of PIs could be attributed to the introduction of bulky tertbutyl and 4-tertbutylphenyl groups in the polymer backbone. [35] In general, amorphous PIs have lower softening temperature and higher solubility as compared with crystalline PIs. As expected, the obtained amorphous PIs exhibited good solubility and could cast into flexible and tough films.…”

Section: Thermal Properties Of the Polyimidesmentioning

confidence: 99%

Novel Non‐Coplanar and Tertbutyl‐Substituted Polyimides: Solubility, Optical, Thermal and Dielectric Properties

et al. 2015

View full text Add to dashboard Cite

A novel aromatic diamine monomer bearing tertbutyl and 4‐tertbutylphenyl groups, 3,3′‐ditertbutyl‐4,4′‐diaminodiphenyl‐4′′‐tertbutylphenylmethane (TADBP), was prepared and characterized. A series of non‐coplanar polyimides (PIs) were synthesized via a conventional one‐step polycondensation from TADBP and various aromatic dianhydrides including pyromellitic dianhydride (PMDA), 3,3′,4,4′‐biphenyltetracarboxylic dianhydride (BPDA), 4,4′‐oxydiphthalic anhydride (OPDA), 3,3′,4,4′‐benzophenone tetracarboxylic dianhydride (BTDA) and 4,4′‐(hexafluoroisopropylidene)dipthalic anhydride (6FDA). All PIs exhibit excellent solubility in common organic solvents such as N,N‐dimethylformamide (DMF), N,N‐dimethylacetamide (DMAc), N‐methyl‐2‐pyrrolidone (NMP), dimethyl sulfoxide (DMSO), chloroform (CHCl3), tetrahydrofuran (THF), and so on. Furthermore, the obtained transparent, strong and flexible polyimide films present good thermal stability and outstanding optical properties. Their glass transition temperatures (Tgs) are in the range of 298 to 347°C, and 10% weight loss temperatures are in excess of 490°C with more than 53% char yield at 800°C in nitrogen. All the polyimides can be cast into transparent and flexible films with tensile strength of 80.5–101 MPa, elongation at break of 8.4%–10.5%, and Young's modulus of 2.3–2.8 GPa. Meanwhile, the PIs show the cutoff wavelengths of 302–356 nm, as well as low moisture absorption (0.30% –0.55%) and low dielectric constant (2.78–3.12 at 1 MHz).

show abstract

Preparation and characterization of highly transparent and colorless semi-aromatic polyimide films derived from alicyclic dianhydride and aromatic diamines

Cited by 125 publications

References 55 publications

Kinetic study of low‐temperature imidization of poly(amic acid)s and preparation of colorless, transparent polyimide films

Kinetic study of low‐temperature imidization of poly(amic acid)s and preparation of colorless, transparent polyimide films

Synthesis and Properties of Cost-Effective Light-Color and Highly Transparent Polyimide Films from Fluorine-Containing Tetralin Dianhydride and Aromatic Diamines

Novel Non‐Coplanar and Tertbutyl‐Substituted Polyimides: Solubility, Optical, Thermal and Dielectric Properties

Contact Info

Product

Resources

About