Silicon-Containing Polyesterimides

Brumă, Maria; Schulz, Burkhard; Köpnick, Thomas; Robison, Jenifer

doi:10.1088/0954-0083/12/3/306

Cited by 29 publications

(24 citation statements)

References 16 publications

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“…1). All acid dichlorides obtained decompose when they are distilled over 80 ºC (2)(3)(4)(5) approximately. For this reason, characterization and polymerization were developed from the crude portion.…”

Section: Resultsmentioning

confidence: 99%

“…The introduction of silane links such as -SiR 1 R 2 -in the main chain, improve the solubility and increase the glass transition temperature in front of wholly aromatic polymers. M. Bruma has described several kinds of Si-containing condensation polymers with different functional groups and studied their properties [2][3][4][5][6]. Also, the lower electronegativity of the Si atom with respect to the C one would imply an increase of the thermal stability due to an ionic character of the C-Si bond when compared with the C-C ones, in spite of the similar bond energy dissociation of both bond [2,7].…”

Section: Introductionmentioning

confidence: 99%

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Poly(amide) oligomers with silarylene and/or germarylene units – synthesis, characterization and thermal studies

et al. 2009

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Ten poly(amide) oligomers were prepared from four acid dichlorides and two full-aromatic diamines, the latter containing silicon or germanium in their structure. The polymers, which contain Et/Me, Et/Et and n Bu/ n Bu combinations on heteroatom of the acid dichloride moiety, were characterized by spectroscopic techniques, including 29 Si NMR. The yields obtained and the nh values established were low, indicating the low molecular weight nature of the polymers. Thermal stability was also evaluated by TG and DSC techniques. When a methyl group was replaced by a Et, the T g of the poly(amides) (PAs) was increased in accordance with the gain in the flexibility of the chain. However and in general terms, the PAs with n Bu groups show the inverse effect. Probably, the possibility of an effective interaction between these side chains affects negatively the flexibility of the main chain. On the other hand, PAs that contain single silicon in their structure show lower T g values than the Ge-containing PAs. For the other heteroatom combinations, similar results were obtained. This fact does not agree with the lower size of silicon atom which should increase the molecular rigidity and therefore their T g values. Probably, the influence of the side groups is decisive in hindering the chain rotation. The thermal degradation temperature (TDT) changed in agreement with the packing factor of the chains which was depending on the size of substitute groups. So, when Et group was replaced by n Bu as lateral group, lower TDT were recovered. With respect to the heteroatoms used in the main chain, the TDT values do not show a clear tendency.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Poly(amide) oligomers with silarylene and/or germarylene units – synthesis, characterization and thermal studies

et al. 2009

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“…2,[10][11][12][13] Likewise, it has been reported the preparation of polycondensation materials that include the ester and other functional groups. 4,6,14 On the other hand, Migdal et al 15 reported the synthesis of a series of dimethylsilylen-containing aliphatic poly(esters). These polymers are based on the reactions of bis(p-carboxymethylphenyl) dimethylsilane diacid and the dialcohols bis(p-hydroxymethylphenyl) dimethylsilane and bis(p-b-hydroxyethylphenyl)dimethylsilane.…”

Section: Introductionmentioning

confidence: 99%

Silicon-Containing Aromatic Poly(esters) Derived From Bis(4-Carboxyphenyl)methyl-R-Silane and Bis(4-(Hydroxymethyl) Phenyl)methyl-R-Silane: Synthesis, Characterization and Thermal Studies

Tagle

Terraza

Pino

2012

J. Chil. Chem. Soc.

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This work describes the synthesis, characterization and thermal studies of poly(esters) (PEs) containing two Si atoms in the main chain, derived from aromatic diacids and aliphatic dialcohols in which the Si atom is bonded to methyl and/or ethyl groups. PEs were characterized by FT-IR and 1 H, 13 C and 29 Si spectroscopy and the results were in agreement with the proposed structures. Poly(esters) were soluble in polar aprotic solvents, such as DMSO and DMF, and acetone, and partially soluble in ethanol. The inherent viscosity and glass transition and thermal decomposition temperatures, h inh , Tg and TDT respectively, were determined. These results showed that PE-2 and PE-4, derived from the dialcohol with the -Si(CH 3 )(CH 2 CH 3 )-moiety as central element, had the larger values of h inh , Tg, TDT and the residual weight after heating at 900 °C, indicating that the specific structure of aliphatic dialcohols control the reaction.

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“…Thus, it is possible to find structures based on bis(p-hydroxyphenylene) [7][8][9][10][11][12][13] , bis(pbromophenylene) 14 , bis(aminophenylene)meta and para isomers, 10,14-16 and bis(p-carboxyphenylene) 11,17,18 , bis(p-ch orocarbonylphenylene) 11,[17][18][19][20][21] , bis(pcarboxyalkylphenylene) 20,22 , bis(p-(3,4 dicarboxyphenylene)) dianhydride 16,[23][24][25][26] , bis(p-isocyanatephenylene) 27 , bis(p-carbohydrazidophenylene) 22 , bis(p acidazidephenylene) 14 and bis(p-chloroformatephenylene) 13,28 moieties. The several polymers obtained from these aromatic monomers show low chain-mobility with low to moderate glass transition temperatures (Tg).…”

Section: Introductionmentioning

confidence: 99%

DIFUNCTIONAL SILARYLENE-CONTAINING ALIPHATIC COMPOUNDS: SYNTHESIS AND CHARACTERIZATION OF BIS(p (CARBOXYMETHYL)PHENYL)(R)PHENYLSILANE AND BIS(p-(2-AMINOETHYL)PHENYL)(R)PHENYLSILANE (R = Me, Ph)

Terraza

Tagle

Lembach

2010

J. Chil. Chem. Soc.

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This work describes the synthesis of aliphatic diacids and diamines containing a silarylene moiety in the structure. These compounds can be employed as monomers for the synthesis of poly(amides) and poly(esters) or other condensation polymers. Thus, bis(p-methylphenylen)(R)phenylsilanes were obtained from p-bromotoluene and dicloro(R)phenylsilane (R= Me, Ph). Also, the dibenzyl nitrile compounds bis(p-(cyanomethyl)phenylen)(R)phenylsilanes were synthesized from the respective bis(p-(bromomethyl)phenylen) (R)phenylsilanes derivatives. The hydrolysis of the dibenzyl nitrile derivatives gives the respective diacids bis(p-(carboxymethyl)phenylen)(R)phenylsilanes with low yield. A direct Grignard reaction type was also studied using as precursors the dibenzyl bromide compounds. In a second stage, the synthesis of the phenethylamine bis(p-(2-aminoethyl)phenylen)(R)phenylsilane was studied by the reduction of the dibenzyl nitrile compounds. All compounds were characterized by IR-TF, 1 H, 13 C and 29 Si NMR.

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Silicon-Containing Polyesterimides

Cited by 29 publications

References 16 publications

Poly(amide) oligomers with silarylene and/or germarylene units – synthesis, characterization and thermal studies

Poly(amide) oligomers with silarylene and/or germarylene units – synthesis, characterization and thermal studies

Silicon-Containing Aromatic Poly(esters) Derived From Bis(4-Carboxyphenyl)methyl-R-Silane and Bis(4-(Hydroxymethyl) Phenyl)methyl-R-Silane: Synthesis, Characterization and Thermal Studies

DIFUNCTIONAL SILARYLENE-CONTAINING ALIPHATIC COMPOUNDS: SYNTHESIS AND CHARACTERIZATION OF BIS(p (CARBOXYMETHYL)PHENYL)(R)PHENYLSILANE AND BIS(p-(2-AMINOETHYL)PHENYL)(R)PHENYLSILANE (R = Me, Ph)

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