Comparison and characterization of discontinuous carbon fiber liquid-molded nylon to hydroentanglement/compression-molded composites

2019 ◽  
Vol 33 (8) ◽  
pp. 1078-1093 ◽  
Author(s):  
Siddhartha Brahma ◽  
Selvum Pillay ◽  
Haibin Ning
Keyword(s):  
Carbon Fiber ◽  
Mechanical Performance ◽  
Weight Fraction ◽  
Polyamide 6 ◽  
Compression Molding ◽  
Fiber Composites ◽  
Strength Properties ◽  
Processing Temperature ◽  
Carbon Fiber Composites ◽  
Scanning Calorimetry

This article looks at liquid molding of polyamide 6 (PA6) via vacuum assisted resin transfer molding (VARTM) of discontinuous recycled carbon fiber composites. Its mechanical, thermal, and optical characterization is compared to hydroentanglement/compression molding. Liquid-molded composites show consistent improvement in their tensile and impact properties at three different weight fractions in comparison to hydroentanglement/compression molding. There was roughly a 10 and 13% increase in its tensile strength, modulus, and impact strength properties at 30 and 40% weight fractions and almost a 120% increase at 50% weight fraction. Fourier-transform infrared spectroscopy and differential scanning calorimetry data show that the caprolactam was synthesized to PA6 and was comparable to commercial grade PA6 used in this research. Scanning electron microscopy studies show poor wet out in the case of hydroentanglement/compression molding as compared to VARTM. The combination of better mechanical performance and lower processing temperature (165°C) shows promise in being a viable method to process PA6-based recycled fiber composites.

scholarly journals Carbon Fiber Composites of Pure Polypropylene and Maleated Polypropylene Blends Obtained from Injection and Compression Moulding

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
D. Pérez-Rocha ◽  
A. B. Morales-Cepeda ◽  
F. Navarro-Pardo ◽  
T. Lozano-Ramírez ◽  
P. G. LaFleur
Keyword(s):  
Mechanical Performance ◽  
Impact Resistance ◽  
Structural Features ◽  
Strength Properties ◽  
Favourable Effect ◽  
Carbon Fiber Composites ◽  
Compression Moulding ◽  
Scanning Calorimetry ◽  
Noticeable Effect ◽  
Maleated Polypropylene

A comparative study of the mechanical performance of PP and PP/PP-g-MAH blends reinforced with carbon fibre (CF) obtained by two different moulding techniques is presented. Three filler contents were used for fabricating the composites: 1, 3, and 5 pph (parts per hundred). The crystallisation behaviour of the composites was studied by differential scanning calorimetry. Morphological and structural features of these samples were observed by atomic field microscopy and Fourier-transform infrared spectroscopy, respectively. Mechanical properties of the injection and compression moulded composites were evaluated by means of tensile and impact resistance tests. The fracture surface of the impacted samples was observed by scanning electron microscopy. The processing method had a noticeable effect on the results obtained in these tests. Young’s modulus was enhanced up to 147% when adding 5 pph CF to a PP matrix when processed by compression moulding. Addition of PP-g-MAH and CF had a favourable effect on the tensile and impact strength properties in most samples; these composites showed improved performance as the filler content was increased.

scholarly journals Advances in Carbon Fiber Reinforced Polyamide-Based Composite Materials

2019 ◽  
Vol 19 (4) ◽  
pp. 67-82 ◽  
Author(s):  
A. Kausar
Keyword(s):  
Carbon Fiber ◽  
High Strength ◽  
Aromatic Polyamide ◽  
Polyamide 6 ◽  
Fiber Composites ◽  
Carbon Fiber Composites ◽  
Polyamide 11 ◽  
Factors Affecting ◽  
Polyamide 12 ◽  
Chemical Inertness

AbstractCarbon fiber has been used to reinforce both aliphatic and aromatic polyamides. Aliphatic polyamide is known as nylon and aromatic polyamide is often referred to as aramid. Among aliphatic polyamides, polyamide 6, polyamide 6,6, polyamide 11, polyamide 12, and polyamide 1010 have been used as matrices for carbon fiber. Factors affecting the properties of polyamide/carbon fiber composites are: fiber amount, fiber length, fiber orientation, matrix viscosity, matrix-fiber interactions, matrix-fiber adhesion, and conditions encountered during manufacturing processes. This article presents a state-of-the-art review on polyamide/carbon fiber composites. Polyamide/carbon fiber composites are lightweight and exhibit high strength, modulus, fatigue resistance, wear resistance, corrosion resistance, gear, electrical conductivity, thermal conductivity, chemical inertness, and thermal stability. Incorporation of oxidized or modified carbon fiber and nanoparticle modified carbon fiber into polyamide matrices have been found to further enhance their physical properties. Applications of polyamide/carbon fiber composites in aerospace, automobile, construction, and other industries have been stated in this review. To fully exploit potential of polyamide/carbon fiber composites, concentrated future attempts are needed in this field.

scholarly journals Effect of Temperature on the Mechanical Properties and Polymerization Kinetics of Polyamide-6 Composites

Polymers ◽  
2020 ◽  
Vol 12 (5) ◽  
pp. 1133 ◽  
Author(s):  
Mei-Xian Li ◽  
Dasom Lee ◽  
Gyu Hee Lee ◽  
Seung Mo Kim ◽  
Goichi Ben ◽  
...  
Keyword(s):  
Carbon Fiber ◽  
Model Fitting ◽  
Polyamide 6 ◽  
Reaction Model ◽  
Polymerization Kinetics ◽  
Thermoplastic Composites ◽  
Effect Of Temperature ◽  
Carbon Fiber Composites ◽  
Scanning Calorimetry ◽  
Kinetics Of

This work reports the preparation of carbon fiber reinforced thermoplastic composites via the in situ anionic ring opening polymerization of ε-caprolactam. Vacuum assisted resin transfer molding was used to fabricate polyamide-6/carbon fiber composites at different molding temperatures. As a result, the higher polymerization of ε-caprolactam was observed with the condition at 140 °C for satisfactory impregnation. Regarding molding temperature, the physical properties of polyamide-6/carbon fiber were observed that the bending and impact strengths at 140 °C were higher than those to at other molding temperatures. The polymerization kinetics of polyamide-6 was analyzed using differential scanning calorimetry by experimentally acquiring kinetic parameters according to model fitting approaches. Polymerization and crystallization, which occur simultaneously throughout the whole process, were separated using Gaussian and Maxwell–Boltzmann distributions to study polymerization kinetics. The result of the developed model was in good agreement with the experimental data for the presented first order autocatalytic reaction model.

Mechanical properties and nonisothermal crystallization of polyamide 6/carbon fiber composites toughened by maleated elastomers

2014 ◽  
Vol 35 (11) ◽  
pp. 2170-2179 ◽  
Author(s):  
Yi Li ◽  
Jinting Xu ◽  
Zhiyong Wei ◽  
Yuqiang Xu ◽  
Ping Song ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Carbon Fiber ◽  
Polyamide 6 ◽  
Fiber Composites ◽  
Carbon Fiber Composites ◽  
Nonisothermal Crystallization
Sign in / Sign up

Export Citation Format

Share Document