Strong, transparent composites based on <scp>glass‐fiber</scp> textile and a polycarbonate–polycaprolactone blend with matching refractive indices

Hirai, Takayuki; Muraoka, Yoshimi; Okamoto, Hiroyuki

doi:10.1002/app.52925

Cited by 5 publications

(3 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Although such a concept has been previously examined, interfacial delamination remains a crucial problem. Most polymers are immiscible, − and thus, the interfacial adhesion between heterogeneous polymers is expected to be poor. Ye et al proposed a 3D object comprising hard and soft polymers, prepared using an FDM-type 3D printer .…”

Section: Introductionmentioning

confidence: 99%

3D-Printed Collision Energy Absorber via Graded Stacking of Hard and Soft Material Layers

Hirai,

Oyama,

Sasagawa

et al. 2024

Ind. Eng. Chem. Res.

Self Cite

View full text Add to dashboard Cite

An energy absorber exhibiting progressive failure and efficient energy absorption, named dual-material energy absorbers (DME), was developed via a graded stacking of hard and soft material layers. Polyamide 6 (PA6) and elastomermodified PA6 were, respectively, used as hard and soft materials to prevent delamination between the hard and soft material layers. The filaments for an FDM-type 3D printer were fabricated by using a twin extruder. DMEs were fabricated by alternately extruding hard and soft materials by using a FDM-type 3D printer with two nozzles. The interface between the hard and soft materials in the DME exhibited good adhesion, owing to the miscibility of the PA6 molecular chain in both materials. Static compression testing revealed that the DME exhibited progressive deformation, and the absorption energy of the DME was twice as high energy as those of monomaterial structures. The deformation behavior under impact loading was confirmed via a drop-weight impact test.

show abstract

Section: Introductionmentioning

confidence: 99%

3D-Printed Collision Energy Absorber via Graded Stacking of Hard and Soft Material Layers

Hirai,

Oyama,

Sasagawa

et al. 2024

Ind. Eng. Chem. Res.

Self Cite

View full text Add to dashboard Cite

show abstract

“…The refractive index of the miscible polymer blend can be adjusted to that of the molten state of the phase-changing polymer by optimizing its composition ratio to increase transparency under high temperatures. 39,40 The thermochromic composite is constructed with a small amount of carbon black (CB) and the ternary blend. In thermochromic composites, the immiscible phase-changing polymer is found in the crystalline phase and scatters incident solar light under low temperatures.…”

Section: Introductionmentioning

confidence: 99%

“…The miscible component surrounding the phase-changing polymer shows favorable transparency because of its homogeneous structure and prevents the leakage of the molten immiscible component. The refractive index of the miscible polymer blend can be adjusted to that of the molten state of the phase-changing polymer by optimizing its composition ratio to increase transparency under high temperatures. , …”

Section: Introductionmentioning

confidence: 99%

Scalable Thermochromic Composite Based on a Ternary Polymer Blend for Temperature-Adaptive Solar Heat Management

Hirai

Kugimoto

Oyama

et al. 2023

ACS Appl. Mater. Interfaces

Self Cite

View full text Add to dashboard Cite

A scalable and durable thermochromic composite is developed for temperature-adaptive solar heat management using a carbon absorber and a thermoresponsive polymer blend consisting of an isolated polycaprolactone phase (PCL) and a continuous phase of miscible poly(methyl methacrylate) and polyvinylidene fluoride. The ternary blend exhibits reversible haze transition originating from the melting and crystallization of PCL. The refractive index matching between the molten PCL and surrounding miscible blend contributes to high-contrast haze switching in the range of 14–91% across the melting temperature of PCL (ca. 55 °C). The solar-absorption-switching properties of the composite are due to the spontaneous light-scattering switching in the polymer blend and the presence of a small amount of carbon black. Spectral measurements indicate that the solar reflectance of the composite sheet varies by 20% between 20 and 60 °C upon lamination with a Ag mirror. Solar heat management using the thermochromic composite is successfully demonstrated under natural sunlight, thereby realizing a temperature-adaptive thermal management system.

show abstract

Fabrication of transparent glass fabric‐reinforced thermoplastic composite based on tow‐spreading technique

Jiang,

Liu

et al. 2024

Polymer Composites

View full text Add to dashboard Cite

Highly transparent and mechanically robust thermoplastic composites have been developed by hot‐pressing PETG with E‐glass fabrics. The tow‐spreading technique facilitates the reduction of internal defects and fiber crimp angle in the composites, thereby significantly improving their optical and mechanical properties. The optimized composite containing 55.1 vol% glass fibers and 0.4 mm thickness has a high transmittance of 86.1%@616 nm and a low overall haze of 7.2%. Moreover, the 1 mm thick composites exhibit tensile strength of up to 340 MPa and impact strength of up to 86.3 kJ/m2. After 28 days of hygrothermal or UV aging, the composites show minimal changes in their glass transition temperature and thermal degradation temperature. The chemical structure also remains unchanged, with no observed crystallization. In comparison to UV aging, the composites demonstrate better resistance against hygrothermal aging. Specifically, the hygrothermal aged sample displayed a light transmittance retention rate of 93.5% and a bending strength retention rate of 94.3%, while these values were reduced to 73.3% and 90.5%, respectively, in the UV aged sample. The opto‐mechanical properties enhanced mechanism and aging degradation mechanism have been identified by microscopic morphological observation. This work provides an innovative and straightforward approach to fabricate transparent, recyclable, high‐strength thermoplastic composites.Highlights Highly transparent, mechanically robust, recyclable glass‐fabric reinforced thermoplastic composites are fabricated. Composites with spread‐tow fabrics exhibits improved transparency. The fabrication route is scalable and cost‐effective. The mechanism for opto‐mechanical properties enhancement are proposed.

show abstract

Strong, transparent composites based on glass‐fiber textile and a polycarbonate–polycaprolactone blend with matching refractive indices

Cited by 5 publications

References 39 publications

3D-Printed Collision Energy Absorber via Graded Stacking of Hard and Soft Material Layers

3D-Printed Collision Energy Absorber via Graded Stacking of Hard and Soft Material Layers

Scalable Thermochromic Composite Based on a Ternary Polymer Blend for Temperature-Adaptive Solar Heat Management

Fabrication of transparent glass fabric‐reinforced thermoplastic composite based on tow‐spreading technique

Contact Info

Product

Resources

About