Synthesis, cure, and composite properties of mixed allyl/propargyl cyclopentadiene resins

Mathias, Lon J.; Tregre, Gregory J.

doi:10.1002/(sici)1099-0488(19981130)36:16<2869::aid-polb1>3.0.co;2-s

Cited by 5 publications

(2 citation statements)

References 5 publications

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“…This decrease was attributed to the lower content of the allylic end groups in longer chains. Thus, the polymerization of allylic group was observed at around 280 °C, which is in accordance with the reported curing temperatures of allylic resins 45, 46…”

Section: Resultssupporting

confidence: 89%

Gemcitabine and paclitaxel every 2 weeks in patients with previously untreated urothelial carcinoma

Calabrò

Lorusso

Rosati

et al. 2009

Cancer

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Background Osteonecrosis (ON) is a severe complication of acute lymphoblastic leukemia (ALL) treatments. Recent studies suggest that bisphosphonates might reduce pain and loss of motor function in patients with ON. We assessed the effects of pamidronate compared to standard care in patients with symptomatic ON (sON) and studied whether steroids might be continued after diagnosis of ON in some patients. Methods We evaluated 17 patients with sON as complication of primary ALL treatment between 2000 and 2008. Fourteen patients were treated with pamidronate. Mobility and pain control were monitored in all patients. Affected joints were classified by magnetic resonance imaging (MRI) at ON diagnosis and after 6–72 months. Results Out of 220 patients with ALL, 17 (7.7%) patients developed sON. The median age at ALL diagnosis was 11 years (range: 2.7–16.6 years) and sON occurred a median of 13.4 months (range: 2.5–34 months) after ALL diagnosis. Affected joints were hip, knee and ankle. MRI scans showed 7 severe, 4 moderate, and 6 mild ON lesions. Fourteen patients showed improvement in pain (77% of patients) and motor function (59% of patients), even though corticoids were reintroduced in 4 patients. MRI demonstrated improvement, stability or worsening in 6, 3, and 5 cases, respectively. Conclusions Pamidronate seems to be effective in the management of pain and motor function recovery in sON. Further studies are needed to provide evidence as to whether bisphosphonates can be recommended for the treatment or the prevention of ON in childhood ALL patients. Pediatr Blood Cancer 2013; 60: 741–747. © 2012 Wiley Periodicals, Inc.

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Section: Resultssupporting

confidence: 89%

Gemcitabine and paclitaxel every 2 weeks in patients with previously untreated urothelial carcinoma

Calabrò

Lorusso

Rosati

et al. 2009

Cancer

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“…180 °C with an exotherm peak at 234 °C; the apparent onset of the second exotherm was at 245 °C with an exotherm maximum at 270 °C, when heating at a rate of 10 °C · min −1 10. The two exotherms are responsible for both allyl and benzoxazine polymerization 8, 60, 61. The total exotherm for pure VBa‐POSS was 142.6 J · g −1 , lower than that for pure VBa (423.2 J · g −1 ); the exothermal peak of VBa‐POSS (260 °C) was positioned at a higher temperature than that of pure VBa (207 °C) because of the dilution effect of the POSS units, which inhibited the thermal curing of VBa 2, 8.…”

Section: Resultsmentioning

confidence: 94%

High‐Performance Polybenzoxazine Nanocomposites Containing Multifunctional POSS Cores Presenting Vinyl‐Terminated Benzoxazine Groups

Huang

Kuo

2010

Macro Chemistry & Physics

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We have prepared a new class of polybenzoxazine/POSS nanocomposites through the reactions of a multifunctional vinyl‐terminated VBa‐POSS with a VBa monomer at various compositional ratios. The incorporation of the silsesquioxane core units into the polybenzoxazine matrix significantly hindered the mobility of the polymer chains and enhanced the thermal stability of these hybrid materials. Increasing the POSS content in these hybrids improved their thermal and mechanical properties, relative to those of the neat polybenzoxazine, because of hydrogen bonding between the siloxane groups of the POSS core units and the OH groups of the polybenzoxazine moieties, as adjudged using FTIR spectroscopy.

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Synthesis, characterization, and thermally activated curing of oligosiloxanes containing benzoxazine moieties in the main chain

Kışkan¹,

Aydoğan²,

Yaǧcı³

2008

J. Polym. Sci. A Polym. Chem.

154

110

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Oligosiloxanes containing thermally curable benzoxazine units in the main chain have been synthesized. For this purpose, first the diallyl functional monomer is synthesized through the Mannich and ring closing reaction of 4,4′‐isopropylidenediphenol (bisphenol A), formaldehyde and allylamine. Hydrosilylation reaction of the resulting diallylic monomer (B‐ala) with 1,1,3,3‐tetramethyldisiloxane (TMDS) in the presence of Pt catalyst yields the corresponding poly(B‐ala‐tetramethyl disiloxane)s (PBTMDS) with the molecular weights in the range of 1800–4100 Da. The structures of the precursor diallyl monomer and the resulting polymers are confirmed by FT‐IR and 1H NMR analysis. Curing behavior of both the monomer and polymers has also been studied by Differential Scanning Calorimetry (DSC). Flexible free standing transparent films of the oligosiloxanes are obtained by solvent casting from dichloromethane solution on Teflon plates. The films preserve shape and, to some extent, toughness after thermal curing between 100 and 180 °C. Thermal properties of the cured polymers are also investigated by thermogravimetric analysis (TGA). © 2008 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 47: 804–811, 2009

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Synthesis, cure, and composite properties of mixed allyl/propargyl cyclopentadiene resins

Cited by 5 publications

References 5 publications

Gemcitabine and paclitaxel every 2 weeks in patients with previously untreated urothelial carcinoma

Gemcitabine and paclitaxel every 2 weeks in patients with previously untreated urothelial carcinoma

High‐Performance Polybenzoxazine Nanocomposites Containing Multifunctional POSS Cores Presenting Vinyl‐Terminated Benzoxazine Groups

Synthesis, characterization, and thermally activated curing of oligosiloxanes containing benzoxazine moieties in the main chain

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