The synthesis and characterization of polyimide homopolymers based on 5(6)-amino-1-(4-aminophenyl)-1,3,3-trimethylindane

Farr, Isaac V.; Kratzner, D.; Glass, Thomas E.; Dunson, Debra L.; Ji, Qing; McGrath, James E.

doi:10.1002/1099-0518(20000801)38:15<2840::aid-pola240>3.0.co;2-n

Cited by 39 publications

(22 citation statements)

References 29 publications

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“…Diamines 1-4, based on ethanoanthracene, 16 triptycene, 17 1,1-spirobisindane 16 and 9,9-spirobiuorene, 42 respectively, were selected for investigation because they all contain fused ring or spirocyclic structures and hence have the potential to generate intrinsic microporosity. 19 Diamine monomer 5, based on 1,3,3trimethyl-1-phenylindane, 43 was chosen due to its use as a monomer for making commercial polyimides (e.g. Matrimid) that are exploited for many different applications including the fabrication of gas separation membranes.…”

Section: Resultsmentioning

confidence: 99%

The synthesis of microporous polymers using Tröger's base formation

et al. 2014

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A step-growth polymerisation based on the formation of Tröger's base, performed by simple reaction of a suitable aromatic diamine monomer with dimethoxymethane in trifluoroacetic acid, provides polymers of high average molecular mass. The properties of the resulting polymers can be tailored by the choice of monomer. In particular, the Tröger's base polymerisation is highly suited to the preparation of soluble polymers of intrinsic microporosity (PIMs) due to the resulting fused-ring TB linking group, which is both highly rigid and prohibits conformational freedom.

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Section: Resultsmentioning

confidence: 99%

The synthesis of microporous polymers using Tröger's base formation

et al. 2014

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“…Considerable research efforts have been focused on the synthesis of soluble polyimides that maintain the excellent properties of this class of compounds 4. Typical approaches include the introduction of bulky lateral groups,5–12 flexible linkages,13, 14 kinked15–20 or unsymmetrical structures21, 22 into the polymer backbone.…”

Section: Introductionmentioning

confidence: 99%

Effect of a closure device on complication rates in high‐local‐risk patients: Results of a randomized multicenter trial

Chevalier

Lancelin

Köning

et al. 2003

Cathet Cardio Intervent

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Clinical trials have shown that coronary stenting is associated with a high level of complications at the access site. Arterial sealing devices have proven their efficacy in obtaining immediate hemostasis after sheath removal, in allowing early ambulation, and in improving patient comfort. However, there is no report showing a reduction of local complications related to their use. The purpose of this multicenter study was to compare randomly the efficacy of Angio-Seal versus compression methods of hemostasis in reducing the rate of access site complications after coronary angioplasty in 612 selected patients with higher risk of local events satisfying at least one of the following high-risk criteria: age> 70, previous puncture at the same site, history of hypertension, treatment with ticlopidine at least 2 days before the procedure, use of abciximab, 8 Fr access, prolonged heparin treatment after the angioplasty, and use of lytics if fibrinogen > 1 g/l. Group A (n = 306) had immediate sheath removal, Angio-Seal implantation, and cessation of bed rest 4 hr after the intervention. Group B (n = 306) had sheath removal according to local practice and cessation of bed rest 6-18 hr after the hemostasis procedure, also according to local practice. Clinical follow-up was done at 1 hr, 4 hr, 24 hr, discharge, and 7 days and a systematic color flow duplex sonography was performed to confirm diagnosis of access site complication. In group A, device deployment and immediate hemostasis were obtained in, respectively, 96.8% and 87% of patients. Time to hemostasis was shorter in group A: 5 vs. 52 min (P < 0.001). Cessation of bed rest was dramatically reduced in group A (438 +/- 450 min) vs. group B (952 +/- 308 min; P < 0.001). The cumulative rate of complications, using a composite primary endpoint, at 7 days was significantly different between the two groups: 5.9% of group A patients and 18% of group B patients (P < 0.001). This difference was mainly due to the dramatic reduction of prolonged bleeding in group A patients. Angio-Seal device use in high-local-risk patients allows immediate sheath removal and hemostasis with a reduction of local event rate despite a higher level of anticoagulation, compared to regular compression techniques, directly related to a dramatic decrease of prolonged bleeding.

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“…7-10 Some of them have been prepared using the fluorinecontaining aromatic diamine or dianhydride. [11][12][13][14][15] Recently, some trifluoromethyl substituted aro-matic diamines have been patented that can be used to synthesize polyimides. 16 -18 However, the specialities of the fluoro polyimides such as solubility, the mechanical property, and hydrolytic resistance have not been examined in detail.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of soluble fluorine‐containing polyimides based on 1,4‐bis(4‐amino‐2‐trifluoromethylphenoxy)benzene

Xie

Zhang

Liu

et al. 2001

J. Polym. Sci. A Polym. Chem.

163

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The synthesis and properties of a class of soluble fluorine-containing aromatic polyimides are described. Substituents of trifluoromethyl groups on the aromatic rings of paralinked aromatic ether diamine conferred the polymer prepared thereof with enhanced solubility, low-moisture absorption, and low dielectric constants. The polyimides also exhibited exceptional thermal stability, good mechanical properties, and excellent hygrothermal resistance. These outstanding combined features ensure the polymers are desirable candidate materials for advanced microelectronics applications.

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The synthesis and characterization of polyimide homopolymers based on 5(6)-amino-1-(4-aminophenyl)-1,3,3-trimethylindane

Cited by 39 publications

References 29 publications

The synthesis of microporous polymers using Tröger's base formation

The synthesis of microporous polymers using Tröger's base formation

Effect of a closure device on complication rates in high‐local‐risk patients: Results of a randomized multicenter trial

Synthesis and characterization of soluble fluorine‐containing polyimides based on 1,4‐bis(4‐amino‐2‐trifluoromethylphenoxy)benzene

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