Improvement of mechanical properties and heat distortion temperature of polylactic acid by highly aromatic hyperbranched polyamide

Sun, Jianyun; Huang, Yansong; Jin, Yang; Tian, Huafeng; Men, Shuang

doi:10.1002/app.52738

Cited by 10 publications

(5 citation statements)

References 37 publications

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“…This might be due to enhancement of the force by the addition of filler content, between the rHDPE molecular chains, and hindering their movement, hence resulted in improved resistance to bending deformation, so that hardening the matrix. The similar findings were reported by Kim and Cho 48 and Sun et al 49 with kenaf fibre/polypropylene composites and polylactic acid/aromatic hyperbranched polyamide.…”

Section: Resultssupporting

confidence: 90%

Effect of silicon carbide particles on the mechanical, thermal and structural properties of recycled high-density polyethylene

Bera,

Sethi,

Mohanty

2024

Plastics, Rubber and Composites: Macromolecular Engineering

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In this research work, recycled high-density polyethylene (rHDPE)/silicon carbide (SiC) composites were produced by melt compounding followed by injection moulding technique. It has been revealed from the mechanical properties that the addition of SiC increases the hardness, density, flexural strength of the composite and tensile strength of the composite. The impact strength at 15 wt-% SiC composite gives the best results. From the thermal analysis, it was observed that the addition of SiC in rHDPE increases the melting point and total enthalpy of crystallisation. The residual value of rHDPE composites increases with the rise in filler loading which enhances the thermal stability of the composites. Melt flow index (MFI) decreases with the increased in silicon carbide. The heat deflection temperature (HDT) increased with the loading of filler content. The contact angle analysis revealed the hydrophilic nature of the composite. MFI reduced with the incorporation of filler content. The SEM images concluded the agglomeration of the composite at higher filler fractions. These results confirm the possibility of using rHDPE/SiC composite to produce various parts for household commodities and structural applications.

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Section: Resultssupporting

confidence: 90%

Effect of silicon carbide particles on the mechanical, thermal and structural properties of recycled high-density polyethylene

Bera,

Sethi,

Mohanty

2024

Plastics, Rubber and Composites: Macromolecular Engineering

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“…Additionally, Table 3 summarizes the specific test parameters that are commonly used to evaluate thermal characteristics. The parameters include T d,5 , T d,10 , T max , and Y 650°C , representing the temperatures at 5% and 10% weight loss, the maximum decomposition rate, and the char yield at 650°C, respectively 42 . As depicted in Figure 8, each TGA curve exhibits a distinct weight loss phase, while Figure 9 displays a single peak on each DTG curve.…”

Section: Resultsmentioning

confidence: 99%

“…The parameters include T d,5 , T d,10 , T max , and Y 650 C , representing the temperatures at 5% and 10% weight loss, the maximum decomposition rate, and the char yield at 650 C, respectively. 42 As depicted in Figure 8, each TGA curve exhibits a distinct weight loss phase, while Figure 9 displays a single peak on each DTG curve. This indicates that all samples underwent decomposition through a one-step process.…”

Section: Thermal Characteristics Of Pa10t-fm Compositesmentioning

confidence: 99%

Effect of addition of fillers (MoS₂ and PFA) on the tribological and mechanical properties of biobased semi‐aromatic polyamide (PA10T)

Zhu,

Pu,

Zheng

et al. 2024

Polymer Composites

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In an attempt to enhance the properties of biobased semi‐aromatic polyamide poly (decamethylene terephthalamide) acid (PA10T), the effects of different proportions of fillers [MoS2 and polyfluoroalkoxy (PFA)] were investigated. A range of stable and wear‐resistant composites, with filler contents varying from 0 to 10 wt%, were successfully prepared using a one‐step extrusion blending method. To analyze the chemical structures, Fourier transform infrared spectroscopy (FT‐IR) experiments were conducted. Additionally, SEM, tribological tests, differential scanning calorimetry (DSC), x‐ray diffraction (XRD), thermogravimetric analyzer (TGA), tensile measurement, notched impact test, and bending test were employed to thoroughly evaluate the properties of both PA10T and composites. The findings demonstrated that the target products were effectively created, and the composites with fillers exhibited superior wear resistance. Alongside this, they showcased comparable heat resistance and mechanical properties to the pure PA10T. Of particular note, when 4 wt% PFA and 6 wt% MoS2 were added, the specific wear rate of PA10T‐F4M6 (0.0016 mg·min−1) was impressively reduced by 86.2% in comparison to pure PA10T (0.0116 mg·min−1). This reduction in wear mass from 0.7 mg (PA10T) to 0.1 mg (PA10T‐F4M6) further confirms the improvement in wear resistance. Ultimately, these results suggest that composites, with their exceptional wear resistance, hold great potential as heat‐resistant engineering thermoplastics in future applications. Thus, they offer promising prospects for wider utilization across various fields. In essence, this study provides valuable insights into the beneficial impact of MoS2 and PFA fillers on polyamide wear resistance.Highlights The biobased poly (decamethylene terephthalamide) acid (PA10T) was synthesized through an efficient one‐pot melt polymerization method. The composites with excellent performance were prepared by blending the biobased semi‐aromatic polyamide PA10T with unique fillers (MoS2 and PFA) for modification. When 4 wt% PFA and 6 wt% MoS2 were added, the specific wear rate of composites was impressively reduced by 86.2% in comparison to pure PA10T. The addition of fillers (MoS2 and PFA) not only improves the wear resistance of PA10T but also enhances its crystallization properties and melting points effectively. The bending modulus of wear‐resistant composites increased to 1553.66 MPa, representing an approximately 50.47% increase compared to PA10T.

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“…As a result, compared to that of pure PLA, the IS of PLA/PPSQ composite containing 2 wt.% PPSQ increased by 80% [14]. Moreover, PLA was crosslinked by highly aromatic hyperbranched polyamide (HBPA) resulting in its heat deformation temperature (HDT) enhancing from 58.6°C (pure PLA) to 61.2°C [15]. Among the aforementioned four modi cation methods, physical lling as a simple and effective method, is widely used in PLA modi cation.…”

Section: Introductionmentioning

confidence: 99%

Crystallization behaviors of chain extended poly (lactic acid) modified with ST-NAB3 and its improved mechanical and thermal properties

Dun,

Zhu,

Zhou

et al. 2024

Preprint

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The widespread use of traditional petroleum-based plastics is causing significant environmental pollution for example microplastics issues, due to its non-biodegradability. Poly (lactic acid) (PLA) as a representative biodegradable polymer is a promising candidate to replace petroleum-based plastics in some fields of disposable packaging materials and tableware. In this work, in order to improve the poor crystallization, mechanical and heat resistance performances of PLA, styrene-acrylonitrile-glycidyl methacrylate (SAG) as a chain extender and octamethylenedicarboxylic dibenzoylhydrazide (ST-NAB3) as a heterogeneous nucleating agent (HNA) were added simultaneously into PLA matrix. The chain-extended PLA (CPLA) with branch structures had smaller crystal sizes and higher crystal density, compared with those of pure PLA. In addition, thanks to the nucleation effect of ST-NAB3 and the development of “shish-kebab”, this tendency became more pronounced in CPLA/HNA systems. It was worth mentioning that, CPLA with the ST-NAB3 content of 1 wt.% (CPLA-1) possessed the highest crystallinity of 43.6%. Meanwhile, CPLA-1 had the best impact strength and heat deformation temperature of 38.9 kJ/m2 and 91.3°C respectively, which had increased by 11.3 kJ/m2 and 32.4°C contrast to pure PLA. On the whole, this study proposed a simple and effective method, which provided a new possibility for PLA modification research.

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Improvement of mechanical properties and heat distortion temperature of polylactic acid by highly aromatic hyperbranched polyamide

Cited by 10 publications

References 37 publications

Effect of silicon carbide particles on the mechanical, thermal and structural properties of recycled high-density polyethylene

Effect of silicon carbide particles on the mechanical, thermal and structural properties of recycled high-density polyethylene

Effect of addition of fillers (MoS₂ and PFA) on the tribological and mechanical properties of biobased semi‐aromatic polyamide (PA10T)

Crystallization behaviors of chain extended poly (lactic acid) modified with ST-NAB3 and its improved mechanical and thermal properties

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Improvement of mechanical properties and heat distortion temperature of polylactic acid by highly aromatic hyperbranched polyamide

Cited by 10 publications

References 37 publications

Effect of silicon carbide particles on the mechanical, thermal and structural properties of recycled high-density polyethylene

Effect of silicon carbide particles on the mechanical, thermal and structural properties of recycled high-density polyethylene

Effect of addition of fillers (MoS2 and PFA) on the tribological and mechanical properties of biobased semi‐aromatic polyamide (PA10T)

Crystallization behaviors of chain extended poly (lactic acid) modified with ST-NAB3 and its improved mechanical and thermal properties

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Product

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About

Effect of addition of fillers (MoS₂ and PFA) on the tribological and mechanical properties of biobased semi‐aromatic polyamide (PA10T)