Morphological and rheological study of the epoxy polymer and their nanocomposite (NGTHTPTBAE/MDA/TSP) crosslinked by methylene dianiline and formulated by trisodium phosphate

The polymer composite material’s thermomechanical properties with fiber as reinforcement material have been widely studied in the last few decades. However, these fiber-based polymer composites exhibit problems such as fiber orientation, delamination, fiber defect along the length and bonding are the matter of serious concern in order to improve the thermomechanical properties and obtain isotropic material behavior. In the present investigation filler-based composite material is developed using natural hemp and high thermal conductive silver nanoparticles (SNP) and combination of dual fillers in neat epoxy polymer to investigate the synergetic influence. Among various organic natural fillers hemp filler depicts good crystallinity characteristics, so selected as a biocompatible filler along with SNP conductive filler. For enhancing their thermal conductivity and mechanical properties, hybridization of hemp filler along with silver nanoparticles are conducted. The composites samples are prepared with three different combinations such as sole SNP, sole hemp and hybrid (SNP and hemp) are prepared to understand their solo and hybrid combination. From results it is examined that, chemical treated hemp filler has to maximized its relative properties and showed, 40% weight % of silver nanoparticles composites have highest thermal conductivity 1.00 W/mK followed with hemp filler 0.55 W/mK and hybrid 0.76 W/mK composites at 7.5% of weight fraction and 47.5% of weight fraction respectively. The highest tensile strength is obtained for SNP composite 32.03 MPa and highest young’s modulus is obtained for hybrid composites. Dynamic mechanical analysis is conducted to find their respective storage modulus and glass transition temperature and that, the recorded maximum for SNP composites with 3.23 GPa and 90°C respectively. Scanning electron microscopy examinations clearly illustrated that formation of thermal conductivity chain is significant with nano and micro fillers incorporation.

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An Investigation of Tensile and Thermal Properties of Epoxy Polymer Modified by Activated Carbon Particle

IOP Conference Series Materials Science and Engineering ◽

10.1088/1757-899x/1094/1/012164 ◽

2021 ◽

Vol 1094 (1) ◽

pp. 012164

Author(s):

Mustafa Baqir Hunain ◽

Salah N Alnomani ◽

Qabas Razzaq

Keyword(s):

Thermal Properties ◽

Activated Carbon ◽

Epoxy Polymer ◽

Carbon Particle

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Mechanical and Morphological Properties of Bio-Phenolic/Epoxy Polymer Blends

Molecules ◽

10.3390/molecules26040773 ◽

2021 ◽

Vol 26 (4) ◽

pp. 773

Author(s):

Ahmad Safwan Ismail ◽

Mohammad Jawaid ◽

Norul Hisham Hamid ◽

Ridwan Yahaya ◽

Azman Hassan

Keyword(s):

Mechanical Properties ◽

Phase Separation ◽

Polymer Blends ◽

Epoxy Polymer ◽

Flexural Modulus ◽

Polymeric Materials ◽

Morphological Properties ◽

Comparison Results ◽

Unique Material ◽

Different Types

Polymer blends is a well-established and suitable method to produced new polymeric materials as compared to synthesis of a new polymer. The combination of two different types of polymers will produce a new and unique material, which has the attribute of both polymers. The aim of this work is to analyze mechanical and morphological properties of bio-phenolic/epoxy polymer blends to find the best formulation for future study. Bio-phenolic/epoxy polymer blends were fabricated using the hand lay-up method at different loading of bio-phenolic (5 wt%, 10 wt%, 15 wt%, 20 wt%, and 25 wt%) in the epoxy matrix whereas neat bio-phenolic and epoxy samples were also fabricated for comparison. Results indicated that mechanical properties were improved for bio-phenolic/epoxy polymer blends compared to neat epoxy and phenolic. In addition, there is no sign of phase separation in polymer blends. The highest tensile, flexural, and impact strength was shown by P-20(biophenolic-20 wt% and Epoxy-80 wt%) whereas P-25 (biophenolic-25 wt% and Epoxy-75 wt%) has the highest tensile and flexural modulus. Based on the finding, it is concluded that P-20 shows better overall mechanical properties among the polymer blends. Based on this finding, the bio-phenolic/epoxy blend with 20 wt% will be used for further study on flax-reinforced bio-phenolic/epoxy polymer blends.

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Cationic and anionic cellulose nanocrystalline (CNC) hydrogels: A rheological study

Physics of Fluids ◽

10.1063/5.0046291 ◽

2021 ◽

Vol 33 (4) ◽

pp. 043102

Author(s):

Parya Keyvani ◽

Kudzanai Nyamayaro ◽

Parisa Mehrkhodavandi ◽

Savvas G. Hatzikiriakos

Keyword(s):

Rheological Study

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Processing of high weight fraction banana fiber reinforced epoxy composites using pressure induced dip casting method

Journal of Composite Materials ◽

10.1177/0021998320988044 ◽

2021 ◽

pp. 002199832098804

Author(s):

TP Mohan ◽

K Kanny

Keyword(s):

Matrix Composite ◽

Epoxy Polymer ◽

Epoxy Composite ◽

Matrix Material ◽

Natural Fibers ◽

Weight Fraction ◽

Polymer Composite Material ◽

Fiber Reinforced ◽

Banana Fiber ◽

Banana Fibers

The objective of this work is to realize new polymer composite material containing high amount of natural fibers as a bio-based reinforcement phase. Short banana fiber is chosen as a reinforcement material and epoxy polymer as a matrix material. About 77 wt.% of banana fibers were reinforced in the epoxy polymer matrix composite, using pressure induced fiber dipping method. Nanoclay particles were infused into the banana fibers to improve the fiber matrix interface properties. The nanoclay infused banana fiber were used to reinforce epoxy composite and its properties were compared with untreated banana fiber reinforced epoxy composite and banana fiber reinforced epoxy filled with nanoclay matrix composite. The surface characteristics of these composites were examined by electron microscope and the result shows well dispersed fibers in epoxy matrix. Thermal (thermogravimetry analysis and dynamic mechanical analysis), mechanical (tensile and fiber pullout) and water barrier properties of these composites were examined and the result showed that the nanoclay infused banana fiber reinforced epoxy composite shows better and improved properties. Improved surface finish composite was also obtained by this processing technique.

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