Phosphorus-containing thermosets obtained by cationic copolymerisation of glycidyl compounds with a spiroorthoester or γ-butyrolactone

Canadell, Judit; Mantecón, Ana; Cádiz, Virgínia

doi:10.1016/j.polymdegradstab.2007.10.023

Cited by 11 publications

(3 citation statements)

References 34 publications

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“…The thermograms recorded in static air show a two‐stage degradation, one of them comprising the major weight loss. The major weight loss registered for sample 1a and 1b is around 37% and 47% (around at 410°C–415°C) and is in good agreement with the literature data49, and for sample 2–4 is between 18% and 43% (around at 450°C–460°C). The relative thermal stabilities of FR and cross‐linked resins were quantitatively estimated using TG parameters ( T 10 , temperature at 10% weight loss; T 50 , temperature at 50% weight loss; WL 500 , weight loss at 500°C) and the activation energies of the degradation process (obtained using Eqs.…”

Section: Resultssupporting

confidence: 90%

Thermosetting resin compositions based on novolac and modified novolac

Mustaţă¹

2011

Adv Polym Technol

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Novel formaldehyde novolac resins at various molar ratios of monomers (4,4 -methylenedianiline/ p-nonylphenol/ p-formaldehyde) were synthesized in the presence of an acid catalyst. The obtained resins were characterized by using elemental analysis, FT IR, and 1 H NMR spectroscopic methods. Subsequently, these resins may further be modified by allylation and methacrylation and may be used as cross-linking agents for epoxy resin/bismaleimide resin formulations. The curing of epoxy and bismaleimide resins with formaldehyde resins (FR) and modified FR and the thermal decomposition behavior of cross-linked resins were studied by differential scanning calorimetry (DSC) and thermogravimetric (TGA) techniques. DSC scans for the curing of epoxy resins with FR show a single exothermic peak, which implied only the occurrence of cure reactions between epoxy ring and amine protons, whereas the DSC scans for the epoxy resins, bismaleimide resins, and modified FR systems have two exothermic peaks. The cured products possess a good thermal stability and low water absorption. C 2011 Wiley Periodicals, Inc. Adv Polym Techn 30: 219-233, 2011; View this article online at wileyonlinelibrary.com.

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Section: Resultssupporting

confidence: 90%

Thermosetting resin compositions based on novolac and modified novolac

Mustaţă¹

2011

Adv Polym Technol

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“…Phosphorous, being a non-metal overcomes this problem, when incorporated into the polymer [10][11][12]. Our earlier studies in this direction showed that the inclusion of phosphate group into the polymer backbone improved their solubility, thermal stability and char yield and reduced the glass-transition temperature (T g ) [13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Liquid crystalline and photoactive poly[4,4′-stilbeneoxy]alkylbiphenylphosphates

Ravikrishnan

Sudhakara

Kannan

2008

Polymer Degradation and Stability

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“…It should be noted that the elemental analysis results from the polymer deviated by 2% -5% for the proposed structures. These differences can be accounted for by: 1) poor solubility and hence poor reactivity in the initial stage of polymerization; 2) difference in the reactivity of monomers during the polymerization, which lead to polymers with different compositions, the so called "composition drift" [20][21][22][23].…”

Section: Synthesis Of Model Compound 2 6-dibenzylidene-4-tert-butylcmentioning

confidence: 99%

Liquid Crystalline Polymers XIII Main Chain Thermotropic Copoly (Arylidene-Ether)s Containing 4-Teriary Butyl-Cyclohexanone Moiety Linked with Polymethylene Spacers

Al‐Muaikel¹,

Aly²

2013

OJOPM

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A new homologous series of thermotropic liquid crystalline copoly(arylidene-ether)s based on 4-teriary butyl cyclohexanone moiety were synthesized by solution polycondensation of 4,4'-diformyl-α,ω-diphenoxyalkanes, I a-d or 4,4'diformyl-2,2'-dimethoxy-α,ω-diphenoxyalkanes II a-d with the 4-teriary butyl-cyclohexanone III and cyclopentanone. A model compound IV was synthesized from the monomer III with benzaldehyde and characterized by elemental and spectral analyses. The inherent viscosities of the resulting polymers were in the range 0.22 -0.92 dI/g. All the copoly(arylidene-ether)s were insoluble in common organic solvents but dissolved completely in concentrated H 2 SO 4 and formic acid. The mesomorphic properties of these polymers were studied as a function of the diphenoxyalkane space length. Their thermotropic liquid crystalline properties were examined by DSC and optical polarizing microscopy and demonstrated that the resulting polymers form nematic mesophases over wide temperature ranges. The thermogravimetric analyses of those polymers were evaluated by TGA and DSC measurements and correlated to their structural units. X-ray analysis showed that copolymers having some degree of crystallinity in the region 2 = 5° -60°. In addition, the morphological properties of selected examples were tested by Scanning electron microscopy.

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Phosphorus-containing thermosets obtained by cationic copolymerisation of glycidyl compounds with a spiroorthoester or γ-butyrolactone

Cited by 11 publications

References 34 publications

Thermosetting resin compositions based on novolac and modified novolac

Thermosetting resin compositions based on novolac and modified novolac

Liquid crystalline and photoactive poly[4,4′-stilbeneoxy]alkylbiphenylphosphates

Liquid Crystalline Polymers XIII Main Chain Thermotropic Copoly (Arylidene-Ether)s Containing 4-Teriary Butyl-Cyclohexanone Moiety Linked with Polymethylene Spacers

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