Microstructure and impact strength of polyamide 6 composites

Yu, Suzhu; Yek, Wei Ming; Ho, Sook Yin; Rannou, Sylvain A.D.; Lim, Szu Hui

doi:10.1016/j.mtcomm.2015.08.004

Cited by 11 publications

(5 citation statements)

References 15 publications

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“…. As discussed above, it is known that adding fibers to the polymeric matrix decreases the impact strength . Referring to the orientation, especially 45° and 90° orientations presented lower values of energy absorption compared to 0° orientation.…”

Section: Resultsmentioning

confidence: 84%

The Influence of Sepiolite Orientation and Concentration, on the Morphological, Thermal and Mechanical Properties of Bio‐Polyamide 4.10 Nanocomposites

Asensio

Herrero

Núñez

et al. 2020

Polymer Engineering & Sci

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Nowadays, trends in automotive sector are toward highperformance materials, but also the concern about the environment has become an important driver for car manufacturers. In this sense, reinforced polymers are lightweight materials that can replace metals in some structural applications with an outstanding contribution to reduce the carbon dioxide emissions. In short fiber-reinforced polymers, processed by injection molding, the fibers are oriented in multiple and arbitrary directions. Due to the arrangement of the fibers, these materials present different thermomechanical behavior. In this study, bio-polyamide 4.10/sepiolite (0-15 wt %) nanocomposites obtained by melt compounding were injected using a square plate mold. Specimens were mechanized in different directions (0 , 45 , and 90 ) from this square plate and morphologically and thermomechanically tested. The sepiolite reinforcement results showed improvement in the thermomechanical properties. Moreover, despite the nanometer size of the reinforcement, the mechanical properties were also dependent on the fiber orientation during the injection molding of the nanocomposites.

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Section: Resultsmentioning

confidence: 84%

The Influence of Sepiolite Orientation and Concentration, on the Morphological, Thermal and Mechanical Properties of Bio‐Polyamide 4.10 Nanocomposites

Asensio

Herrero

Núñez

et al. 2020

Polymer Engineering & Sci

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“…Generally, the impact behavior of short or long fiber-reinforced polyamide-6 composites has been studied. [23,24] In the studies, it is usually mentioned that LVI phenomena cause matrix and fiber damage and delamination. Moreover, LVI damage in composite laminates is caused by a combination of matrix cracking or fiber/ matrix debonding, intra-laminar damage, and fiber distortion or fracture, which leads to the delamination phase.…”

Section: Introductionmentioning

confidence: 99%

Residual compressive strength of polyamide fiber‐reinforced epoxy composites after low‐velocity impact

et al. 2023

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In this study, polyamide fibers, which stand out with their excellent plastic deformation and energy absorption capacity, were used as reinforcement materials, and in‐house manufactured composite specimens were subjected to low‐velocity impact (LVI), compression after impact (CAI) and tensile tests. Within this scope, one and two repeated drop tests were performed under 3 m/s velocity to determine LVI responses and how impact number affects the dynamic properties. CAI tests were also performed at a 1 mm/min crosshead speed, and mechanical properties for non‐impacted, one‐impacted, and two‐impacted specimens were determined. As a result of the outstanding plastic deformation capacity of thermoplastic fabrics, it is concluded that polyamide composites exhibited quite large strains. Furthermore, it was understood from the tensile responses that tensile stresses were carried by the thermoplastic fibers in two different regimes and significantly high toughness was obtained. Moreover, reductions in the maximum compression loads, critical buckling loads and axial stiffness were observed due to degradation in structural integrity after impact loads. Additionally, the utilization of recyclable thermoplastic polyamide fibers as reinforcement material instead of conventional reinforcement materials such as carbon and glass fibers provide more environmentally friendly products.

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“…Furthermore, PA12, which has the smallest water absorption of among all PA groups analysed to date, is advantageous since water-dispersion lubricants are often used during the SPIF. In recent years Cloisite 93A filler has been used as a reinforcing agent in polymer matrices: polyamide 12 [43], polyamide 6 [50,51], polypropylene [52], poly(lactic acid) [53], epoxy [54,55], and polychloroprene [56].…”

Section: Introductionmentioning

confidence: 99%

Characterisation of Polyamide (PA)12 Nanocomposites with Montmorillonite (MMT) Filler Clay Used for the Incremental Forming of Sheets

et al. 2019

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In this paper, the preparation and characterisation of polymer materials suitable for single point incremental forming (SPIF) technology were performed. Three different kinds of mixtures were selected: a mixture of neat polyamide 12 (PA12), a nanocomposite with PA12 matrix and 1% clay (Cloisite 93A), and a nanocomposite with PA12 matrix and 3% clay (Cloisite 93A). Materials were produced using a melt intercalation method followed by compression moulding. According to the needs of SPIF technology, morphological and mechanical properties were investigated in the obtained mixtures. Transmission electron microscopy (TEM) and X-ray diffraction (XRD) were used to characterize morphological properties. It was determined that the most desired obtained exfoliated structure of clay in the polymer matrix was achieved. Static tensile testing and dynamic mechanical analysis as well as the determination of glass transition temperature and crystallinity of all analysed materials were used to obtain mechanical and thermal properties of the mixtures. The results obtained for each mixture were compared with respect to the content of clay. The content of clay (Cloisite 93A) showed a strong influence on the properties of the obtained materials. The presence of clay (Cloisite 93A) affected the increase of tensile strength and Young’s modulus, while its influence on the attained elongation was not unique.

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Microstructure and impact strength of polyamide 6 composites

Cited by 11 publications

References 15 publications

The Influence of Sepiolite Orientation and Concentration, on the Morphological, Thermal and Mechanical Properties of Bio‐Polyamide 4.10 Nanocomposites

The Influence of Sepiolite Orientation and Concentration, on the Morphological, Thermal and Mechanical Properties of Bio‐Polyamide 4.10 Nanocomposites

Residual compressive strength of polyamide fiber‐reinforced epoxy composites after low‐velocity impact

Characterisation of Polyamide (PA)12 Nanocomposites with Montmorillonite (MMT) Filler Clay Used for the Incremental Forming of Sheets

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