High solubility and optical transparency of novel polyimides containing 3,3′,5,5′-tetramethyl pendant groups and 4-tert-butyltoluene moiety

Wang, Chenyi; Zhao, Xiaoyan; Li, Guang; Jiang, Jianming

doi:10.1016/j.polymdegradstab.2009.04.032

Cited by 28 publications

(13 citation statements)

References 27 publications

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“…The dielectric constants of PTAIs are in the range of 3.04-3.34 at 1 MHz and dielectric loss is in the range of 0.15-0.40 at 1 MHz, which were much lower than the standard Kapton film. 24 The results suggested that 1,2,3-triazole units in the polymer chain could improve the dielectric performance. However, both the dielectric constant and dielectric loss are remarkably decreased with increasing frequency.…”

Section: Dielectric Propertiesmentioning

confidence: 98%

“…However, highly optical transparency is also one of the most attractive properties of polyimide (PI) materials for optical applications. [2][3][4] Over the years, a tremendous amount of work has been performed on structure/property relationships in polyimides to obtain fundamental information that could be used to develop polyimides with unique combination of properties for demanding applications. Consequently, the studies utilizing monomers containing heterocyclic unit to synthesize novel heteroaromatic polymers have been focused widely.…”

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confidence: 99%

“…6 Click chemistry has recently drawn increasing attention in organic synthesis, superamolecular chemistry, and material surface modification because of its high selectivity, near-perfect reliability, high yields, and exceptional tolerance toward a wide range of functional groups and reaction conditions. 2 Click chemistry is increasingly used in the preparation of highperformance engineering thermoplastic polymers. To date, only few reports on the preparation and characterization of polyimide containing 1,2,3-triazole ring via click chemistry are found in the literature.…”

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confidence: 99%

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Preparation and Properties of Polyimides Containing 1,2,3‐Triazole Moieties

Rukmanikrishnan

Sarojadevi

2015

Adv Polym Technol

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ABSTRACT:A new diamine containing 1,2,3-triazole ring was synthesized by the click reaction in the presence of Cu (I) catalyst.A series of novel polytriazoleimides (PTAIs) were synthesized using the prepared diamine by the conventional two-step thermal or chemical imidization method with commercially available aromatic dianhydrides. The chemical structure of the monomers and polymers was characterized by Fourier transform Infrared, 1 H nuclear magnetic resonance (NMR), and 13 C NMR spectral analysis. Solubility of the PTAIs was tested in various organic solvents. The glass transition temperatures of these PTAIs are in the range of 215-254°C. PTAIs exhibit low dielectric constant of 3.04-3.34 at 1 MHz, high thermal stability, and temperature corresponding to 5% (T 5% ) weight loss is in the range of 442-492°C. The flame retardance values (limiting oxygen index) are in the range of 38.4-40.5. The PTAI films exhibited good mechanical properties with tensile strength of 96.2-98.9 MPa, elongation to break of 9.8-12.6%, and tensile modulus of 2.5-3

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Section: Dielectric Propertiesmentioning

confidence: 98%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Preparation and Properties of Polyimides Containing 1,2,3‐Triazole Moieties

Rukmanikrishnan

Sarojadevi

2015

Adv Polym Technol

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“…Many attempts have been made to improve the processability of PIs without sacrificing their thermal and mechanical properties. During the past decades, some progress has been made in the chemical modification of the parent PIs structure to get more soluble polymer derivatives, for example, introducing the flexible linkages or geometrically asymmetric units, bulky lateral groups or noncoplanar structures into the polymer backbone [8][9][10][11][12][13][14][15]. It also has been demonstrated that incorporation of a cyclic side cardo group, such as a fluorene, a phenylcyclohexane, or an adamantane group, into the macromolecular backbone was quite effective to improve the solubility of PIs without deteriorating their inherent excellent properties [16][17][18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Novel fluorinated polyimides derived from 9,9-bis(4-amino-3,5-difluorophenyl)fluorene and aromatic dianhydrides

Wang¹,

Zhao²,

Li³

et al. 2009

Polymer Degradation and Stability

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“…Polyimide P I 5, containing MDA units, had the maximum thermal stability, with the IDT values of 482/422 C, and polymer P I 6 (with CDA units) had the minimum IDT values of 275/265 C in both N 2 and O 2 (thermal and thermooxidative) atmospheres. The initial decomposition values of the polymers indicate that the polymer degradation commenced at comparatively lower temperatures under thermooxidative conditions than in nitrogen environment [23] (Fig. 4).…”

Section: Thermal Stabilitiesmentioning

confidence: 95%

Thermal Cycloimidization Study of Polyimides and Poly(amide imide)s Synthesized from Low-Temperature Solution Polymerization

Dodda

Remiš

Martı́n

et al. 2015

Journal of Macromolecular Science, Part B

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Polyimides (PI)s and Poly(amide imide)s (PAI)s containing di/tri-structural arrangements of monomer constituents were synthesized from 1,2,4,5 benzenetetracarboxylic anhydride/3,3 0 ,4,4 0 benzophenonetetracarboxylic dianhydride, diamines and trimellitic dianhydride chloride, i.e., a mixture of dianhydrides and diamines, using low-temperature solution polymerization. The majority of the resulting polymers were readily soluble in polar aprotic solvents such as dimethylformamide, dimethylsulfoxide, dimethylacetamide, etc. Thermal cycloimidization studies by thermogravimetic analysis (TGA) and Fourier transform infrared spectroscopy (FT-IR) revealed that the rate of cycloimidization was much faster during the initial 15 min, and then occurred at much slower rates till the completion. The activation energies (Ea) for thermal cycloimidization of poly(amic acid)s was calculated from the rate of mass loss of the polymer heated at different temperatures according to the Coats and Redfern method. PI and PAIs derived from diamines containing single cyclic/benzene ring structures, such as mphenylenediamine and 1,3-cyclohexanebis(methylamine), showed less amount of char yield than those having two benzene rings and separated by methylene, sulfone, or ether linkages. The structure of both diamine and trimellitic chloride had a profound effect on the polymer chain mobility, as indicated by the big variation in the glass transition temperatures. Thermally stable polymers were developed into membranes and tested for their mechanical strength by dynamic mechanical analysis(DMA).

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High solubility and optical transparency of novel polyimides containing 3,3′,5,5′-tetramethyl pendant groups and 4-tert-butyltoluene moiety

Cited by 28 publications

References 27 publications

Preparation and Properties of Polyimides Containing 1,2,3‐Triazole Moieties

Preparation and Properties of Polyimides Containing 1,2,3‐Triazole Moieties

Novel fluorinated polyimides derived from 9,9-bis(4-amino-3,5-difluorophenyl)fluorene and aromatic dianhydrides

Thermal Cycloimidization Study of Polyimides and Poly(amide imide)s Synthesized from Low-Temperature Solution Polymerization

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