scholarly journals Bio-Based Furan-Polyesters/Graphene Nanocomposites Prepared by In Situ Polymerization

Polymers ◽  
2021 ◽  
Vol 13 (9) ◽  
pp. 1377
Author(s):  
Laura Sisti ◽  
Grazia Totaro ◽  
Annamaria Celli ◽  
Loris Giorgini ◽  
Simone Ligi ◽  
...  
Keyword(s):  
In Situ Polymerization ◽  
Polymer Chains ◽  
Graphene Nanocomposites ◽  
Water Suspensions ◽  
Heat Distortion Temperature ◽  
Almost All ◽  
Poly Propylene ◽  
Ordered State ◽  
Intercalative Polymerization

In situ intercalative polymerization has been investigated as a strategic way to obtain poly(propylene 2,5-furandicarboxylate) (PPF) and poly(hexamethylene 2,5-furandicarboxylate) (PHF) nanocomposites with different graphene types and amounts. Graphene (G) has been dispersed in surfactant stabilized water suspensions. The loading range in composites was 0.25–0.75 wt %. For the highest composition, a different type of graphene (XT500) dispersed in 1,3 propanediol, containing a 6% of oxidized graphene and without surfactant has been also tested. The results showed that the amorphous PPF is able to crystallize during heating scan in DSC and graphene seems to affect such capability: G hinders the polymer chains in reaching an ordered state, showing even more depressed cold crystallization and melting. On the contrary, such hindering effect is absent with XT500, which rather induces the opposite. Concerning the thermal stability, no improvement has been induced by graphene, even if the onset degradation temperatures remain high for all the materials. A moderate enhancement in mechanical properties is observed in PPF composite with XT500, and especially in PHF composite, where a significative increase of 10–20% in storage modulus E’ is maintained in almost all the temperature range. Such an increase is also reflected in a slightly higher heat distortion temperature. These preliminary results can be useful in order to further address the field of application of furan-based polyesters; in particular, they could be promising as packaging materials.

scholarly journals Thermal Decomposition Kinetics and Mechanism of In-Situ Prepared Bio-Based Poly(propylene 2,5-furan dicarboxylate)/Graphene Nanocomposites

Molecules ◽  
2019 ◽  
Vol 24 (9) ◽  
pp. 1717 ◽  
Author(s):  
Zoi Terzopoulou ◽  
Evangelia Tarani ◽  
Nejib Kasmi ◽  
Lazaros Papadopoulos ◽  
Konstantinos Chrissafis ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Decomposition Kinetics ◽  
Graphene Nanoplatelets ◽  
Decomposition Mechanism ◽  
Graphene Nanocomposites ◽  
New Class ◽  
Degradation Reactions ◽  
Melt Polycondensation ◽  
Poly Propylene

Bio-based polyesters are a new class of materials that are expected to replace their fossil-based homologues in the near future. In this work, poly(propylene 2,5-furandicarboxylate) (PPF) nanocomposites with graphene nanoplatelets were prepared via the in-situ melt polycondensation method. The chemical structure of the resulting polymers was confirmed by 1H-NMR spectroscopy. Thermal stability, decomposition kinetics and the decomposition mechanism of the PPF nanocomposites were studied in detail. According to thermogravimetric analysis results, graphene nanoplatelets did nοt affect the thermal stability of PPF at levels of 0.5, 1.0 and 2.5 wt.%, but caused a slight increase in the activation energy values. Pyrolysis combined with gas chromatography and mass spectroscopy revealed that the decomposition mechanism of the polymer was not altered by the presence of graphene nanoplatelets but the extent of secondary homolytic degradation reactions was increased.

scholarly journals Facile preparation of polyimide/graphene nanocomposites via an in situ polymerization approach

RSC Advances ◽  
2017 ◽  
Vol 7 (5) ◽  
pp. 3003-3011 ◽  
Author(s):  
Songlv Qin ◽  
Cheng Chen ◽  
Mingjun Cui ◽  
Afang Zhang ◽  
Haichao Zhao ◽  
...  
Keyword(s):  
In Situ Polymerization ◽  
Aromatic Diamine ◽  
Graphene Nanocomposites ◽  
Good Dispersion ◽  
Facile Preparation ◽  
Polyimide Matrix

In this study, to achieve a compatible and good dispersion of graphene in polyimide matrix, we synthesized an aromatic diamine, aniline trimer, as a polymerizable graphene dispersant.

Synthesis of Poly(propylene)/Graphite Nanocomposites by in Situ Polymerization

2011 ◽  
Vol 299-300 (1) ◽  
pp. 48-56 ◽  
Author(s):  
Larissa Stieven Montagna ◽  
Fabiana de Carvalho Fim ◽  
Griselda Barrera Galland ◽  
Nara Regina de Souza Basso
Keyword(s):  
In Situ Polymerization ◽  
Poly Propylene ◽  
Graphite Nanocomposites

Preparation of Epoxy Resin/Montmorillonite Composites by Monomer Insert In Situ Polymerization

2010 ◽  
Vol 178 ◽  
pp. 236-241
Author(s):  
Jing Xie ◽  
Shang Yue Shen ◽  
Yu Xia Luo ◽  
Meng Meng Zhang ◽  
Ying Chen
Keyword(s):  
Tensile Strength ◽  
Glass Transition ◽  
Transition Temperature ◽  
Epoxy Resin ◽  
In Situ Polymerization ◽  
Raw Materials ◽  
One Step ◽  
Polymerization Method ◽  
Intercalative Polymerization

Epoxy resin/ montmorillonite (EP/MMT) composite was prepared via monomer insert in-situ polymerization. It was shown that the EP/MMT composites could be successfully synthesized from the raw materials only by one step, making it simpler than traditional in-situ intercalative polymerization method. The d001 spacing of montmorillonite was tested by XRD and increased to 4.30nm. The results showed that tensile strength and impact strength were improved by 98.11 and 93.69%, respectively. The glass transition temperature was increased by 17.3 °C.

Synthesis, characterization and properties of poly(propylene-1-octene)/graphite nanosheet nanocomposites obtained by in situ polymerization

Polymer ◽  
2015 ◽  
Vol 65 ◽  
pp. 134-142 ◽  
Author(s):  
Marcéo A. Milani ◽  
Darío González ◽  
Raúl Quijada ◽  
Rosario Benavente ◽  
Javier Arranz-Andrés ◽  
...  
Keyword(s):  
In Situ Polymerization ◽  
Graphite Nanosheet ◽  
Poly Propylene

Biodegradable Poly(Lactic Acid)/Organic-Montmorillonite Nanocomposites: Preparation and Characterization

2009 ◽  
Vol 87-88 ◽  
pp. 422-426 ◽  
Author(s):  
Na Li Chen ◽  
Hui Xia Feng ◽  
He Ming Luo ◽  
Dan Zhao ◽  
Jian Hui Qiu
Keyword(s):  
Lactic Acid ◽  
In Situ Polymerization ◽  
Interlayer Spacing ◽  
Poly Lactic Acid ◽  
Organic Montmorillonite ◽  
Heat Distortion Temperature ◽  
Biodegradable Poly ◽  
Ft Ir ◽  
Silicate Layers

In this work, the biodegradable poly(lactic acid) (PLA)/organic-montmorillonite (O-MMT) nanocomposites were successfully prepared by the in situ polymerization intercalation process of D,L-lactide with organically-modified montmorillonite which was first treated by Cu cations and second treated by n-hexadecyl trimethylammonium bromide (CTAB) cations. O-MMT was characterized by FT-IR and XRD, the results showed that Cu cations and CTAB cations had been inserted to the interlayer of MMT, and the interlayer spacing of CTAB-Cu-MMT (O-MMT) increased by 1.829nm. The biodegradable PLA/O-MMT nanocomposites were characterized by XRD, SEM, FT-IR, TG, and the results showed that silicate layers were intercalated into the PLA matrix and the biodegradable PLA/O-MMT nanocomposites were of two different types: intercalated nanocomposites and exfoliated nanocomposites. This new nanocomposites frequently exhibited remarkable improvements when compared with the neat PLA matrix. Improvements could include increased heat distortion temperature, an increase in the biodegradability rate of biodegradable polymers.

Sign in / Sign up

Export Citation Format

Share Document