Synthesis and characterization of silicon-containing cardo polyesters

Joshi, M. D.; Sarkar, Anjana; Yemul, Omprakash S.; Wadgaonkar, Prakash P.; Lonikar, S. V.; Maldar, N. N.

doi:10.1002/(sici)1097-4628(19970516)64:7<1329::aid-app12>3.0.co;2-s

Cited by 19 publications

(20 citation statements)

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“…1 H, 13 C and 29 Si NMR spectra were carried out on a 400 MHz instrument (Bruker AC-200) using DMSO-d 6 , CDCl 3 or acetone-d 6 as solvents and TMS as the internal standard. 1 H, 13 C and 29 Si NMR spectra were carried out on a 400 MHz instrument (Bruker AC-200) using DMSO-d 6 , CDCl 3 or acetone-d 6 as solvents and TMS as the internal standard.…”

Section: Instrumentationmentioning

confidence: 99%

“…In a typical polymerization process, 0.82 mmol of the monomeric diacid are dissolved in 1.92 mL of pyridine and are stirred by 30 minutes. 13 29 Si NMR (DMSO-d 6 ) (d) (ppm): À7.79 (22). Then, the mixture is heated at 90 C for 10 minutes and a solution of 0.82 mmol of the silylated diphenol in 0.97 mL of pyridine is added.…”

Section: Polymer Synthesis and Characterizationmentioning

confidence: 99%

“…[1][2][3][4] However, when poly(esters) have high aromatic content, the processing is difficult due to high T g values and insolubility in common organic solvents. [10][11][12][13] Cardo or bulky side groups have the objective of to reduce the intermolecular interactions between the polymeric chains due to the higher free volume, and consequently it is possible to improve the solubility and to decrease the T g due to the higher internal mobility of the polymeric chains. In this sense the introduction of exible units in the main or side chain, or cardo groups, are solutions proposed in order to increase the solubility and to decrease the T g values, but without affecting the thermal stability.…”

Section: Introductionmentioning

confidence: 99%

“…[10][11][12][13] Cardo or bulky side groups have the objective of to reduce the intermolecular interactions between the polymeric chains due to the higher free volume, and consequently it is possible to improve the solubility and to decrease the T g due to the higher internal mobility of the polymeric chains. 13,16,17 In this sense, Thames 16,18 and Bruma 19,20 have described siliconcontaining polymers, with good solubility in common organic solvents and low T g values, but maintaining the thermal stability. 2,5,14 On the other hand, the introduction of exible groups in the repeating unit also has been used in order to improve the processability.…”

Section: Introductionmentioning

confidence: 99%

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Silicon-containing poly(esters) with halogenated bulky side groups. Synthesis, characterization and thermal studies

et al. 2015

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Poly(esters) (PEs) derived from diacids containing bulky side groups, which have an halogenated (Cl, Br) imide ring, an aminoacidic residue (glycine, L-alanine, L-valine) and an amide group were obtained with a silicon-containing diphenol. Also PEs without the aminoacidic residue were obtained. PEs were characterized by IR and NMR spectroscopy, and the results were in agreement with the proposed structures. PEs were obtained with good yields and moderate or high h inh values. PEs were soluble in aprotic polar solvents and were swollen in other solvents like m-cresol and THF. The T g values were determined and it was possible to see a tendency in the sense that when the size of the atom (Cl, Br) bonded to the imidic ring is increased, the T g values decreased, also for those PEs obtained without the aminoacidic residue. The thermal decomposition temperatures showed that only two PEs can be considered as thermostable, considering TDT values above 400 C at 10% of weight lost. The other PEs showed good thermal stability, showing in general a decrease of the TDT values when the volume of the side group, is increased. PEs showed UV-vis transparency at 400 nm lower than 20%, but between 500 and 600 nm, showed 80% transparency. PEs containing halogen atoms showed flame retardancy in a simple essay, with respect to PEs without halogen atoms in which the combustion was complete.Scheme 1 Synthesis of the dicarboxylic imide-amide-acids X-II-(a-c).Scheme 2 Synthesis of the dicarboxylic imide-acids X-III. This journal isScheme 3 Synthesis of poly(esters) X-PE-(a-c) and poly(esters) X-PE. 49134 | RSC Adv., 2015, 5, 49132-49142 This journal is

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Section: Instrumentationmentioning

confidence: 99%

Section: Polymer Synthesis and Characterizationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Silicon-containing poly(esters) with halogenated bulky side groups. Synthesis, characterization and thermal studies

et al. 2015

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“…[5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21] These approaches work by forcing the chains apart and lend to the improved solubility and better processability.…”

Section: Introductionmentioning

confidence: 99%

Processable aromatic polyesters based on bisphenol derived from cashew nut shell liquid: synthesis and characterization

et al. 2014

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A new bisphenol viz., 4-(4-hydroxyphenoxy)-3-pentadecylphenol (HPPDP) was synthesized starting from cashew nut shell liquid (CNSL). Aromatic (co)polyesters containing ether linkages in the main chain and pendent pentadecyl chains were synthesized by the interfacial polycondensation of HPPDP with terephthalic acid chloride (TPC), isophthalic acid chloride (IPC) and a mixture of TPC and IPC (50:50 mol %) and by polycondenation of varying composition of HPPDP and bisphenol-A (BPA) with TPC. The resultant (co)polyesters exhibited inherent viscosities in the range 0.70-1.21 dL g −1 and number-average molecular weights in the range 16,000-48,200 (GPC, polystyrene standard). Polyesters were soluble in common organic solvents such as chloroform and dichloromethane and could be cast into films from chloroform solution. Polyesters exhibited T 10 values in the range 430-455°C and Tg values were in the range 29-202°C. Dynamic mechanical storage modulus and maximum on transition of tan δ curve decreased with increased content of HPPDP in copolyesters. Importantly, the large difference between Tg and T 10 values offers the possibility to process these polyesters in the melt.

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Synthesis and characterization of norbornane‐containing cardo polyamides

Liaw

1999

J. Polym. Sci. A Polym. Chem.

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Synthesis and characterization of silicon-containing cardo polyesters

Cited by 19 publications

References 0 publications

Silicon-containing poly(esters) with halogenated bulky side groups. Synthesis, characterization and thermal studies

Silicon-containing poly(esters) with halogenated bulky side groups. Synthesis, characterization and thermal studies

Processable aromatic polyesters based on bisphenol derived from cashew nut shell liquid: synthesis and characterization

Synthesis and characterization of norbornane‐containing cardo polyamides

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