Improved thermal and mechanical properties of polynorbornene upon covalent attachment with graphene sheets

Polymer ◽  
2017 ◽  
Vol 123 ◽  
pp. 321-333 ◽  
Author(s):  
Madhumita Mukherjee ◽  
Saikat Mukherjee ◽  
Rajan Kumar ◽  
Raja Shunmugam
Keyword(s):  
Mechanical Properties ◽  
Covalent Attachment ◽  
Graphene Sheets ◽  
Thermal And Mechanical Properties

scholarly journals Comparative Studies on Crystallinity, Thermal and Mechanical Properties of Polyketone Grown on Plasma Treated CVD Graphene

Polymers ◽  
2021 ◽  
Vol 13 (6) ◽  
pp. 919
Author(s):  
Sunghun Cho ◽  
Jun Seop Lee ◽  
Hyeji Jang ◽  
Seorin Park ◽  
Ji Hyun An ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Plasma Treatment ◽  
Crystalline Structure ◽  
Chemical Vapor ◽  
Graphene Sheets ◽  
Thermal And Mechanical Properties ◽  
Cvd Graphene ◽  
Surface Functionality ◽  
Doped Graphene ◽  
Grown Graphene

In this work, we report a facile way to control crystalline structures of polyketone (PK) films by combining plasma surface treatment with chemical vapor deposition (CVD) technique. The crystalline structure of PKs grown on plasma-treated graphene and the resulting thermal and mechanical properties were systematically discussed. Every graphene sheet used in this work was produced by CVD method and the production of PKs having different crystallinity were performed on the O2- and N2-doped graphene sheets. It was evident that the CVD-grown graphene sheets acted as the nucleating agents for promoting the crystallization of β-form PK, while suppressing the growth of α-form PK crystals. Regardless of the increase in surface roughness of graphene, surface functionality of the CVD-grown graphene was found to be an important factor in determining the crystalline structure of PK. N2 plasma treatment of the CVD-grown graphene promoted growth of the β-form PK, whereas the O2 plasma treatment of CVD graphene led to transformation of the unoriented β-form PK into the oriented α-form PK. Thus, the resulting thermal and mechanical properties of the PKs were highly dependent on the surface functionality of the CVD graphene. The method of controlling crystalline structure of the PKs suggested in this study, is expected to be very effective in realizing the PK with good processability, heat resistance and mechanical properties.

Polyamides containing a biorenewable aromatic monomer based on coumalate esters: from synthesis to evaluation of the thermal and mechanical properties

2021 ◽  
Vol 12 (16) ◽  
pp. 2379-2388
Author(s):  
Jules Stouten ◽  
Aleksandra A. Wróblewska ◽  
Glenn Grit ◽  
Jurrie Noordijk ◽  
Bert Gebben ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Propionic Acid ◽  
Terephthalic Acid ◽  
Thermal And Mechanical Properties ◽  
Aromatic Polyamides ◽  
Aromatic Monomer

A new biobased alternative for terephthalic acid (TPA) in (semi-)aromatic polyamides is proposed, namely 4-carboxybenzene propionic acid (4CBPA).

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