Characterization of Energetic Mixed Crystals by Means of TGA and DSC Calorimetry

Different polyesteramides hyperbranched polymers (HPEA1-6)/montomorillonite clay (MMT) nanocomposites were prepared with three different loading contents of clay (4, 10, and 15 wt%). The obtained nanocomposites were characterized via XRD, thermal analyses, and TEM. Generally, intercalation behavior was observed. The hyperbranched polyesteramides (HPEA1-6) were originally prepared by the bulky reaction between maleic anhydride (MAn), succinic anhydride (ScAn), and phthalic anhydride (PhAn) with either diethanolamine (DEA) or diisopropanolamine (DiPA). The resulting hyperbranched polyesteramides (HPEA1-6) were characterized by GPC, IR,1H-NMR, TGA, and DSC.

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On the growth and characterization of mixed crystals of the triglycine sulphate family

Journal of Crystal Growth ◽

10.1016/0022-0248(93)90157-r ◽

1993 ◽

Vol 133 (3-4) ◽

pp. 212-216 ◽

Cited By ~ 23

Author(s):

G. Ravi ◽

S. Anbukumar ◽

P. Ramasamy

Keyword(s):

Mixed Crystals ◽

Triglycine Sulphate

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Preparation and characterization of polyhedral oligomeric silsesquioxane/polystyrene nanocomposites

e-Polymers ◽

10.1515/epoly.2012.12.1.769 ◽

2012 ◽

Vol 12 (1) ◽

Cited By ~ 1

Author(s):

Benhong Yang ◽

Meng Li ◽

Yun Wu ◽

Kang Wang

Keyword(s):

Thermal Stability ◽

Thermal Property ◽

Polyhedral Oligomeric Silsesquioxane ◽

29Si Nmr ◽

Solution Blending ◽

Oligomeric Silsesquioxane ◽

Tga And Dsc ◽

Thermal Stability Of

AbstractSeveral inorganic/organic nanocomposites were prepared via solution-blending of cage-like octahexyl-polyhedral oligomeric silsesquioxane (Oh-POSS) with polystyrene (PS) in THF solvent. FTIR and 29Si-NMR were employed to characterize the structures of the nanocomposites. SEM pictures showed that the sample films were smooth and no POSS aggregation was observed when POSS content was lower than 1.0 wt%. TGA and DSC were used to investigate the thermal property. The results showed that the incorporation of nanosized Oh-POSS enhanced the thermal stability of PS with low POSS content. When 1.0 wt% of Oh-POSS was incorporated into PS matrix, the Tg and Td increased by 7.7 °C and 8.2 °C, respectively. However, higher POSS contents (>1.0 wt%) would deteriorate the thermal property of the nanocomposites due to the severe congregation of POSS..

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Characterization of EVA Residues from the Shoe Industry and Post-Consumer Urban-Waste Polyethylenes

Cellular Polymers ◽

10.1177/026248930502400303 ◽

2005 ◽

Vol 24 (3) ◽

pp. 139-158 ◽

Cited By ~ 11

Author(s):

A.J. Zattera ◽

O. Bianchi ◽

R.V.B. Oliveira ◽

L.B. Canto ◽

C.A. Ferreira ◽

...

Keyword(s):

Tensile Modulus ◽

Urban Waste ◽

Elongation At Break ◽

Shoe Industry ◽

Izod Impact ◽

Lower Elongation ◽

Mechanical Tensile ◽

High Degree ◽

Tga And Dsc

This paper presents a characterization of a crosslinked EVA residue (EVA-c) from expanded sheets used in the shoe industry and post-consumer urban-waste polyethylenes regarding their molecular (FTIR), mechanical (tensile and impact tests), morphological (SEM), thermal (DSC, TGA) and dynamic-mechanical (DMTA) properties. For comparison, the properties of the EVA-c and recycled polyethylenes are compared to respective virgin polymers. The recycled polyethylenes generally presented similar properties to the virgin ones. On the other hand, some EVA-c properties differed from virgin ones since it has a high degree of crosslinking and it therefore has a higher tensile modulus and lower elongation at break, notched Izod impact strength and hardness. Additionally, crosslinking was also found to modify the thermal properties (TGA and DSC) of EVA-c.

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Characterization of Hemp (Cannabis sativa L.) Biodiesel Blends with Euro Diesel, Butanol and Diethyl Ether Using FT-IR, UV–Vis, TGA and DSC Techniques

Waste and Biomass Valorization ◽

10.1007/s12649-018-0340-8 ◽

2018 ◽

Vol 11 (3) ◽

pp. 1097-1113 ◽

Cited By ~ 4

Author(s):

M. N. Mohammed ◽

A. E. Atabani ◽

Gediz Uguz ◽

Chyi-How Lay ◽

Gopalakrishnan Kumar ◽

...

Keyword(s):

Diethyl Ether ◽

Cannabis Sativa ◽

Biodiesel Blends ◽

Ft Ir ◽

Tga And Dsc

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Optical Characterization of Zn0.95-xBe0.05MnxSe Mixed Crystals

Journal of the Korean Physical Society ◽

10.3938/jkps.53.77 ◽

2008 ◽

Vol 53 (1) ◽

pp. 77-82 ◽

Cited By ~ 1

Author(s):

H. P. Hsu ◽

T. W. Chang ◽

Y. S. Huang ◽

F. Firszt ◽

S. Lȩgowski ◽

...

Keyword(s):

Optical Characterization ◽

Mixed Crystals

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Synthesis and Characterization of Niobium Oxide Nanoparticles, Polyindole and Nb2O5/Polyindole Nanocomposite

Asian Journal of Chemistry ◽

10.14233/ajchem.2020.22397 ◽

2020 ◽

Vol 32 (3) ◽

pp. 653-658

Author(s):

S. Anandhi ◽

D. Keerthika ◽

M. Leo Edward ◽

V. Jaisankar

Keyword(s):

Niobium Oxide ◽

Sol Gel ◽

Degree Of Crystallinity ◽

Oxide Nanoparticles ◽

Spectroscopic Techniques ◽

Crystallite Sizes ◽

Chemical Character ◽

Tga And Dsc ◽

Polymerization Method

In present work, polyindole-Nb2O5 nanocomposite was synthesized and characterized by various analytical methods. Niobium oxide nanoparticles were prepared by sol gel method. Polyindole and Nb2O5 nanocomposites was prepared by chemical polymerization method and the morphology of Nb2O5 nanoparticles, polyindole and the nanocomposite was studied by SEM. The chemical structure of Nb2O5 nanoparticle, polyindole and the nanocomposite was characterized by UV-visible, FTIR and NMR spectroscopic techniques. Elemental composition and chemical character was analyzed by the use of EDAX technique. The X-ray powder diffraction technique was used to determine the degree of crystallinity and crystallite sizes. Thermal analysis such as TGA and DSC showed that the conducting polymers in the nanocomposites were stable even at high temperatures.

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Preparation of Tri(alkenyl)functional Open-Cage Silsesquioxanes as Specific Polymer Modifiers

Polymers ◽

10.3390/polym12051063 ◽

2020 ◽

Vol 12 (5) ◽

pp. 1063

Author(s):

Katarzyna Mituła ◽

Michał Dutkiewicz ◽

Julia Duszczak ◽

Monika Rzonsowska ◽

Beata Dudziec

Keyword(s):

Condensation Reaction ◽

Polyhedral Oligomeric Silsesquioxanes ◽

Double Decker ◽

Application Potential ◽

Synthetic Routes ◽

High Yields ◽

Chain Lengths ◽

Tga And Dsc ◽

Melting And Crystallization Temperatures

The scientific reports on polyhedral oligomeric silsesquioxanes are mostly focused on the formation of completely condensed T8 cubic type structures and recently so-called double-decker derivatives. Herein, we report on efficient synthetic routes leading to trifunctionalized, open-cage silsesquioxanes with alkenyl groups of varying chain lengths from -vinyl to -dec-9-enyl and two types of inert groups (iBu, Ph) at the silsesquioxane core. The presented methodology was focused on hydrolytic condensation reaction and it enabled obtaining titled compounds with high yields and purity. A parallel synthetic methodology that was based on the hydrosilylation reaction was also studied. Additionally, a thorough characterization of the obtained compounds was performed, also in terms of their thermal stability, melting and crystallization temperatures (TGA and DSC) in order to show the changes in the abovementioned parameters dependent on the type of reactive as well as inert groups at Si-O-Si core. The presence of unsaturated alkenyl groups has a profound impact on the application potential of these systems, i.e., as modifiers or comonomers for copolymerization reaction.

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