Effect of the top layer modification of polymers on their thermostability and flammability

Chruściel, Jerzy; Janowska, G.; Rybiński, Przemysław; Ślusarski, L.

doi:10.1007/s10973-005-6937-8

Cited by 17 publications

(13 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The increase of the thermal stability with the increasing boron content, as determined by the indicator T 50 , was also observed-in the following order of PMVBSs: B 3 , we obtain that under air atmosphere PMVBSs characterize lower thermal stabilities than for the polymethylsiloxanes bearing only methyl groups or functional hydrosiloxane or vinylsiloxane groups in macromolecules [38].…”

Section: Resultssupporting

confidence: 65%

“…The indicators of the thermal stabilities, T 5 and T 50 , as determined from TG curves under nitrogen atmosphere, show higher values (Table 4) than those under air atmosphere (Table 3). The thermal decomposition of the PMVBSs under nitrogen atmosphere begins at T C 140°C, [28][29][30][31][32][33][34]38], in comparison with the heating process under nitrogen atmosphere. A liberation of these products promotes ceramization processes: the formation of the ceramics of the type SiBCO [19,[36][37][38]]-a borosilicate glass and silica.…”

Section: Resultsmentioning

confidence: 99%

“…The thermal decomposition of the PMVBSs under nitrogen atmosphere begins at T C 140°C, [28][29][30][31][32][33][34]38], in comparison with the heating process under nitrogen atmosphere. A liberation of these products promotes ceramization processes: the formation of the ceramics of the type SiBCO [19,[36][37][38]]-a borosilicate glass and silica. Apparently, these processes occur more intensively under air atmosphere than under nitrogen atmosphere, which leads to the distinctly higher value of the residue after thermooxidative decomposition of PMVBSs (P 800 ), as compared with the residue after thermal decomposition (P 500 ) ( Tables 3, 4).…”

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Thermal properties of polymethylvinylborosiloxanes

Chruściel

Janowska

Fejdyś

2012

J Therm Anal Calorim

Self Cite

View full text Add to dashboard Cite

New branched polymethylvinylborosiloxanes (PMVBSs) with random structures were prepared, and their chemical structures were studied by spectroscopic methods (FTIR, 1 H-, 29 Si-, and 11 B-NMR) and elemental analysis (% C, % H, % Si, and % B). Average molecular weights M w and M n were determined by a size exclusion chromatography (SEC), and dynamic viscosities were measured in Brookfield cone-plate reoviscometer HBDV-II?cP. Thermal properties of PMVBSs were studied under air and under nitrogen atmosphere. Thermal curves were interpreted from the point of view of physical and chemical transitions, taking place during the heating process of PMVBSs. Parameters of their thermal stabilities and glass transition temperatures (T g ) were determined. The synthesized PMVBSs are characterized by low glass transition temperatures (T g : from -122 to -137°C) which depend on their chemical structures. It was concluded that gaseous products (such as volatile siloxanes, silanes, CO 2 , H 2 O, CH 2 O, methanol, and formic acid), which could be liberated during the heating process of PMVBSs, promote ceramization processes, leading to the formation of the ceramics of a type SiBCO-a borosilicate glass and silica.

show abstract

Section: Resultssupporting

confidence: 65%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Thermal properties of polymethylvinylborosiloxanes

Chruściel

Janowska

Fejdyś

2012

J Therm Anal Calorim

Self Cite

View full text Add to dashboard Cite

show abstract

“…The possibility of preparing elastomers modified with metal oxides generated in situ by the sol–gel process has been already reviewed in several publications 1–7…”

Section: Introductionmentioning

confidence: 99%

Isoprene rubber filled with silica generated in situ

Messori

Fiorini

2010

J of Applied Polymer Sci

View full text Add to dashboard Cite

We modified synthetic isoprene rubber by means of the in situ generation of silica particles through the sol-gel process starting from tetraethoxysilane (TEOS) as an inorganic oxide precursor. Different reaction conditions were investigated with variations in the initial TEOS content, the reaction time of the sol-gel process, and the presence of a coupling/surfactant agent (octyltriethoxysilane). Organic-inorganic hybrid materials with a silica content up to 70 phr were obtained with the complete conversion of TEOS to silica for a long enough sol-gel reaction time. A very homogeneous dispersion of silica particles was observed in all cases together with a very good adhesion between the filler and matrix. The size of the in situ generated silica was controlled by the appropriate addition of octyltriethoxysilane. Swelling and extraction tests and dynamic mechanical analysis indicated that the vulcanization process of isoprene rubber was perturbed by the sol-gel process; this led to a slight decrease in the crosslinking degree. However, a significant reinforcing effect due to the presence of silica particles was observed for all of the investigated samples.

show abstract

“…[ 27 ] Therefore, the dealcoholization condensation dominates over the dehydration condensation. [ 28 ] The condensation further leads to the formation of positively charged sol solid nanoparticles (SSNPs) with a diameter of few hundreds of nm suspended in a colorless and transparent sol phase (Figure 1 b). [ 28 ] The condensation further leads to the formation of positively charged sol solid nanoparticles (SSNPs) with a diameter of few hundreds of nm suspended in a colorless and transparent sol phase (Figure 1 b).…”

Section: Characterizations Of Zcsp-bngmentioning

confidence: 99%

Hierarchically Nanoporous Bioactive Glasses for High Efficiency Immobilization of Enzymes

Min

Zhang

et al. 2013

Adv Funct Materials

View full text Add to dashboard Cite

Bioactive glasses with hierarchical nanoporosity and structures have been heavily involved in immobilization of enzymes. Because of meticulous design and ingenious hierarchical nanostructuration of porosities from yeast cell biotemplates, hierarchically nanostructured porous bioactive glasses can provide a simple, cost-effective way to enhance catalytic activity of directly immobilized enzyme. Its unique chemical surface properties and hierarchical meso/macroporous structures lead to highly effi cient catalytic performances of the directly immobilized enzymes. The enzyme molecules were spontaneously entrapped into the highly curved macropores (200-500 nm) via multipoint metal ion binding in electrical double layers. Hence, the enzyme activity and enzyme loading were enhanced, the cost of enzyme use was reduced, showing higher thermal and storage stabilities than free enzyme. The reactant and products of catalytic reactions can freely diffuse through open mesopores (2-40 nm). The formation mechanism of hierarchically structured porous bioactive glasses, the immobilization mechanism of enzyme and the catalysis mechanism of immobilized enzyme are then discussed. The novel nanostructure with advanced properties is expected to be utilized as a solid support for any enzyme for bioconversion, bioremediation, biosensors and drugs.

show abstract

Effect of the top layer modification of polymers on their thermostability and flammability

Cited by 17 publications

References 10 publications

Thermal properties of polymethylvinylborosiloxanes

Thermal properties of polymethylvinylborosiloxanes

Isoprene rubber filled with silica generated in situ

Hierarchically Nanoporous Bioactive Glasses for High Efficiency Immobilization of Enzymes

Contact Info

Product

Resources

About