Rheology characterization, dynamic mechanical, thermal, and mechanical properties of LGF/TPU/PBT/PTW composites

Zhang, Daohai; He, Min; Qin, Shuhao; Yu, Jianxing

doi:10.1002/pc.24001

Cited by 6 publications

(10 citation statements)

References 52 publications

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“…The ability of restricting the chain segment for the matrix resins can be stronger as the length of the original glass ber increases, and this causes the terminal relaxation time. This observation is in accordance with the experimental results of Zhang et al 21 and Graebling. 22…”

Section: Complex Viscosity Of the Lgf/pbt Compositessupporting

confidence: 94%

“…This observation is in accordance with other reported results. 21,32,33 As shown in Fig. 14, TG curves of LGF/PBT composites rstly shi to higher temperatures and then shi to low temperatures with the increase in the length of the original glass bers.…”

Section: Tga Analysis and Loi Of The Lgf/pbt Compositesmentioning

confidence: 92%

“…A similar increase in storage modulus of the polymer composites because of the increasing test frequencies were also reported by some researchers. 21,23,24 From Table 1, the storage modulus of LGF/PBT composites rstly increases and then decreases with the length of the original glass ber increase.…”

Section: Dma Analysis Of Lgf/pbt Compositesmentioning

confidence: 97%

“…Other researchers have also reported similar experimental results. 21,27,28 The T g of a-transition and b-transition for LGF/PBT composites increase with the length of the original glass ber increase, which occurs because the molecular motion of the matrix resin was restricted in the LGF/PBT composites.…”

Section: Dma Analysis Of Lgf/pbt Compositesmentioning

confidence: 99%

“…This can be because the TPU has outstanding uidity which reduces the barrier for the movement of matrix resin. Zhang et al 21 and Li et al 30 reported that the activation energies for the T g relaxation determined from the loss tangent (tan d) peaks are more reliable than using the loss modulus (E 00 ) criterion.…”

Section: Tan D Of Lgf/pbt Compositesmentioning

confidence: 99%

See 4 more Smart Citations

Effect of fiber length and dispersion on properties of long glass fiber reinforced thermoplastic composites based on poly(butylene terephthalate)

Zhang

Qin

et al. 2017

RSC Adv.

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Long glass fiber reinforced poly(butylene terephthalate) (LGF/PBT) composites with different original glass fiber lengths were prepared using a impregnation device designed by the authors. The influence of fiber length and fiber distribution on the properties of the LGF/PBT composites were studied. The results showed that the length of the residual glass fibers increased with the original glass fiber length increase of LGF/PBT composites. Scanning electron microscopy results indicated that the glass fibers of LGF/PBT composites (16 nm and 20 mm) were unevenly dispersed and this is a phenomenon of their reunion in the resin matrix. Various rheological plots including viscosity curve, storage modulus, loss modulus, and loss angle, were used to characterization the rheological properties of the pristine matrix and the LGF/PBT composites. Dynamic mechanical thermal analysis results indicated that the storage and loss modulus of the LGF/PBT composites firstly increase and then decrease with original glass fiber length. The storage and loss modulus, glass transition temperatures of the pristine matrix and LGF/PBT composites increase with test frequencies increase. The activation energies of glass transition relaxation for the activation energies for loss tangent (tan d) and loss modulus (E 00 ) peaks were calculated. Furthermore, the glass transition relaxation determined from the tan d peaks were more reliable than using the E 00 criterion. Differential scanning calorimetry analysis indicated that the crystallization temperature (T c ), percentage crystallinity (X c ) and melting point of the LGF/PBT composites firstly increased and then slightly decreased with the increase of the original glass fiber length. Thermogravimetry (TG) and differential thermal gravimetric analysis curves of the LGF/thermoplastic polyurethane (TPU)/PBT/polyethylene-butylacrylate-glycidyl methacrylate (PTW) composites were shifted to higher temperatures with the increase of the LGF content.Thermogravimetric analysis results showed that the TG curves of the LGF/TPU/PBT/PTW composites firstly shifted to higher temperatures and then shifted to lower temperatures as the original glass fiber length increased. The limiting oxygen values of the pristine matrix and LGF/PBT composites showed little change, which indicated that the effect of the original glass fiber length on the combustion behavior of LGF/PBT composites was not obvious. The tensile strength, notched Izod impact strength, flexural strength and modulus of the LGF/PBT composites firstly increase and then decrease with the original glass fiber length.When the original glass fiber length was 12 mm, the mechanical properties of LGF/PBT composites were optimal.

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Section: Complex Viscosity Of the Lgf/pbt Compositessupporting

confidence: 94%

Section: Tga Analysis and Loi Of The Lgf/pbt Compositesmentioning

confidence: 92%

Section: Dma Analysis Of Lgf/pbt Compositesmentioning

confidence: 97%

Section: Dma Analysis Of Lgf/pbt Compositesmentioning

confidence: 99%

Section: Tan D Of Lgf/pbt Compositesmentioning

confidence: 99%

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Effect of fiber length and dispersion on properties of long glass fiber reinforced thermoplastic composites based on poly(butylene terephthalate)

Zhang

Qin

et al. 2017

RSC Adv.

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Thermo‐mechanical and shape memory behavior of TPU/ABS/MWCNTs nanocomposites compatibilized with ABS‐g‐MAH

et al. 2018

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Thermo‐mechanical and shape memory behavior of melt processed TPU/ABS (80/20 w/w) blends compatibilized with varying amounts of ABS‐g‐MAH loaded with multiwalled carbon nanotubes (MWCNTs) were discussed. The morphological observations by SEM and TEM techniques confirmed that introduction of ABS‐g‐MAH leads to a significant reduction in the size of ABS domain size due to improvement of interfacial adhesion between the blend components. Incorporation of MWCNTs to the compatibilized blend resulted in further reduction of the ABS droplet size. Mechanical properties investigations revealed that tensile strength of the TPU/ABS blend being about 26.4 MPa increases to 44.6 MPa, that is, about 70% improvement, on incorporation of 6 wt% ABS‐g‐MAH to the noncompatibilized blend. In the same direction, Young's modulus increases ca. 13%. A significant enhancement of about 70% in Young's modulus of the compatibilized blend was observed by inclusion of 2 wt% MWNCNTs. The shape memory results showed that interfacial compatibilization process has a strong positive impact on the shape recovery and shape fixity ratio of the blends. Moreover, loading MWCNTs into the compatibilized blend further improved these features. POLYM. COMPOS., 40:789–800, 2019. © 2018 Society of Plastics Engineers

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Preparation and properties of silane coupling agent modified vermiculite and its composite films

Pei

Shang

et al. 2023

Polymer Composites

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Vermiculite (VMT) was used as a filler and it was modified with silane coupling agent KH570 to produce OVMT. VMT/PBAT and OVMT/PBAT composite films were prepared using the solution method using polybutylene terephthalate (PBAT) as a matrix. The structure, thermal properties, crystalline properties, rheological properties, cross‐sectional microstructure, and tensile properties and antibacterial properties of the pure PBAT film, VMT/PBAT, and OVMT/PBAT composite films were tested, including comparative analysis. The results showed that VMT was successfully modified with silane coupling agent to produce OVMT. Furthermore, the thermal stability of VMT/PBAT and OVMT/PBAT composite films decreased compared with pure PBAT film. As the content of VMT and OVMT increases, the energy storage modulus and loss modulus of VMT/PBAT and OVMT/PBAT composite films increase, while the loss factor, complex viscosity and crystallinity gradually decrease. Additionally, the tensile strength and elongation at break of VMT/PBAT and OVMT/PBAT composite films decrease. All three films had no effect on Staphylococcus aureus or Escherichia coli. The modification of VMT with the silane coupling agent KH570 improved the compatibility of OVMT with PBAT, resulting in improved mechanical properties of the OVMT/PBAT composite film compared with the VMT/PBAT composite film. The mechanical properties of the OVMT/PBAT‐20% composite film increased by 35.9% in tensile strength and 10.8% in elongation at break compared with the VMT/PBAT‐20% composite film.Highlights VMT successfully modified with silane coupling agent to produce OVMT. The modification promotes the compatibility of the filler with PBAT. VMT modification helps to improve the mechanical properties of composite materials. Vermiculite modification helps to improve the toughness of composite materials.

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Rheology characterization, dynamic mechanical, thermal, and mechanical properties of LGF/TPU/PBT/PTW composites

Cited by 6 publications

References 52 publications

Effect of fiber length and dispersion on properties of long glass fiber reinforced thermoplastic composites based on poly(butylene terephthalate)

Effect of fiber length and dispersion on properties of long glass fiber reinforced thermoplastic composites based on poly(butylene terephthalate)

Thermo‐mechanical and shape memory behavior of TPU/ABS/MWCNTs nanocomposites compatibilized with ABS‐g‐MAH

Preparation and properties of silane coupling agent modified vermiculite and its composite films

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