Thermal characterization of polymeric anion exchangers with a dendrimeric structure

Grochowicz, Marta; Gawdzik, Barbara; Jaćkowska, Magdalena; Buszewski, Bogusław

doi:10.1007/s10973-013-3096-1

Cited by 9 publications

(6 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Figure 6 presents the three-dimensional diagram of infrared absorption of the evolved gases versus wave number and temperature, and the decomposition rate selected at the maxima (corresponding to T max1 and T max3 ) in the FTIR spectra of the evolved gaseous degradation products of 4VP-TRIM 1:1 material. As can be seen, the main decomposition products of 4VP-TRIM microspheres are water (bands in the region of 3,700-3,600 and 1,600-1,400 cm -1 ) and carbon dioxide (peaks at 2357, 2311 and 670 cm -1 ) [18,19]. However, in the first emission spectrum weak absorption peaks at 3083, 1595, 1150, and 718 cm -1 are visible and they are connected with the emission of pyridine as the main product of thermal decomposition of 4VP units [17].…”

Section: Resultsmentioning

confidence: 99%

Investigation of the thermal behavior of 4-vinylpyridine–trimethylolpropane trimethacrylate copolymeric microspheres

Grochowicz

2014

J Therm Anal Calorim

Self Cite

View full text Add to dashboard Cite

The study describes the thermal properties of porous microspheres synthesized with functional monomer 4-vinylpyridine (4VP) and crosslinking agent trimethylolpropane trimethacrylate (TRIM). Polymeric 4VP-TRIM microspheres were prepared via seed polymerization, using polystyrene microbeads as a shape template. The resulting 4VP-TRIM microspheres were in the range of 9-12 lm, with specific surface area of about 200 m 2 g -1 . The thermal properties of 4VP-TRIM materials were evaluated by thermogravimetry and differential scanning calorimetry. By TG/FTIR/MS, it was observed that new porous materials exhibited multi-staged decomposition patterns, different from poly(TRIM) microspheres. DSC and TG experiments showed that water molecules were absorbed on the materials' surface. The synthesized 4VP-TRIM microspheres exhibited rather high thermal stability. Their initial decomposition temperature was about 300°C. During the microspheres' decomposition, an evolution of carbon dioxide, water, and carbon monoxide as main gases, as well as of pyridine and aliphatic compounds, was observed. It was confirmed that the evolved pyridine accelerated the degradation of copolymeric network.

show abstract

Section: Resultsmentioning

confidence: 99%

Investigation of the thermal behavior of 4-vinylpyridine–trimethylolpropane trimethacrylate copolymeric microspheres

Grochowicz

2014

J Therm Anal Calorim

Self Cite

View full text Add to dashboard Cite

show abstract

“…The FTIR spectra exhibited directly the bands characteristic for carbon dioxide at 2310-2360 cm -1 [20][21][22][23], carbon oxide at 2110-2184 cm -1 [22,23], and water vapor at 3600-3740 cm -1 [22][23][24][25][26]. The presence of the deformation vibrations and the stretching vibrations at 1373-1384, 1448-1458 ,and 2734-2969 cm -1 related to the C-H vibrations in the -CH 3 and -CH 2 -groups are observed.…”

Section: Decomposition In Inert Atmospherementioning

confidence: 99%

Thermal properties of citronellyl diesters

Worzakowska

2014

J Therm Anal Calorim

View full text Add to dashboard Cite

Thermal properties of linear citronellyl diesters were studied by TG/DSC/FTIR/QMS-coupled method in inert and oxidative atmospheres. The diesters decompose in one main step in inert atmosphere. As main pyrolysis products, the formation of mainly monoterpene hydrocarbons, acid anhydrides, monoacids, cyclic ketones, aldehyde fragments, carbon dioxide, and water was observed. It was indicated on the ester and O-citronellyl bonds cleavage, partial decarboxylation, and elimination of water from formed dicarboxylic acids during their pyrolysis. The decomposition in air runs in two steps. The first step was connected with the creation of monoterpene hydrocarbons, monoacids, cyclic ketones, aldehydes, carbon dioxide, carbon monoxide, and water. In the second step of decomposition, mainly carbon dioxide and water were produced. It was testified to ester and O-citronellyl bonds cleavage, partial oxygenation, and decarboxylation process of the primary formed decomposition products.

show abstract

“…(Kolarz et al 2002;Oh et al 2008;Li and Chase 2010;Grochowicz et al 2013;Maciejewska and Kołodyńska 2015). Obviously, their application is closely related to both their chemical composition and microscale morphology.…”

Section: Introductionmentioning

confidence: 99%

Positron porosimetry study of mesoporous polymer–silica composites

et al. 2016

View full text Add to dashboard Cite

The polymer-SiO 2 composites prepared using polymers with different chemical composition and porosity (i.e. XAD4, XAD16, and XAD7) as well as series of composites synthesized with different contents of silica species and at different pH were investigated. The study was conducted to compare the results of nitrogen adsorption and positron porosimetry for these three sets of samples. The possible causes of the inconsistency between the results of both methods are discussed. The impact of the chemical character of the polymer support surface on the final properties of the polymer-silica composite was found to be greater than its porosity (i.e. the shape of pores and their connectivity). Changing the SiO 2 content influences mostly the pore volume of composites. To significantly modify their pore size distribution, more than 30 wt% of silica species are required. The composite synthesized at pH 5 has the widest pore size distribution among all samples supported by XAD7. The discrepancies concerning the porosity derived with both methods are the smallest for composites where XAD7 was used as the support. This allows determination of the relation V = (3.38 V PALS -0.03) cm 3 /g, which may be useful for estimation of pore volumes corresponding to those found by nitrogen adsorption.

show abstract

Thermal characterization of polymeric anion exchangers with a dendrimeric structure

Cited by 9 publications

References 27 publications

Investigation of the thermal behavior of 4-vinylpyridine–trimethylolpropane trimethacrylate copolymeric microspheres

Investigation of the thermal behavior of 4-vinylpyridine–trimethylolpropane trimethacrylate copolymeric microspheres

Thermal properties of citronellyl diesters

Positron porosimetry study of mesoporous polymer–silica composites

Contact Info

Product

Resources

About