Effect of LLDPE on Aging Resistance and Thermal, Mechanical, Morphological Properties of UHMWPE/LLDPE Blends

Santos, Caroline Martins dos; Silva, Bruna Cristina da; Backes, Eduardo Henrique; Montagna, Larissa Stieven; Pessan, Luiz Antônio; Passador, Fábio Roberto

doi:10.1590/1980-5373-mr-2018-0320

Cited by 13 publications

(6 citation statements)

References 26 publications

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“…It has been observed in Figure 4 that a small amount of UHMWPE is well miscible with LLDPE to form a honeycomb structure. It plays an important role in strengthening and toughening 35 …”

Section: Resultsmentioning

confidence: 99%

Morphology evolution and mechanical property enhancement of linear low‐density polyethylene by adding disentangled ultrahigh molecular weight polyethylene

Zhang

et al. 2021

Polymers for Advanced Techs

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Ultra‐high molecular weight polyethylene (UHMWPE) and linear low‐density polyethylene (LLDPE) with different ratios were melt‐blended in an internal mixer. Results of rheological tests and scanning electron microscopy indicate that the blends are well miscible in the range of small addition amount of UHMWPE. The content of UHMWPE is suggested to be less than 5.0 wt%, to guarantee good compatibility of biphasic blends. Differential scanning calorimetry studies indicate that co‐crystallization occurs between UHMWPE and LLDPE. The crystallinity increases with the increase of UHMWPE as a nucleating agent. As a result, an improvement in mechanical properties is achieved. When the addition amount of UHMWPE is 5.0 wt%, the impact strength, breaking elongation, Young's modulus, and tensile strength are significantly increased by 27%, 25%, 75%, and 21% respectively.

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“…It has been observed in Figure 4 that a small amount of UHMWPE is well miscible with LLDPE to form a honeycomb structure. It plays an important role in strengthening and toughening 35 …”

Section: Resultsmentioning

confidence: 99%

Morphology evolution and mechanical property enhancement of linear low‐density polyethylene by adding disentangled ultrahigh molecular weight polyethylene

Zhang

et al. 2021

Polymers for Advanced Techs

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“…The polyethylene presents an orthorhombic crystal lattice, and the diffraction profiles are relative to the aforementioned crystallographic planes. 45,46 The characteristic peaks of LLDPE can be clearly observed in the nanocomposite samples. This indicates the crystalline structure of LLDPE was not significantly affected by compounding with different amounts of HNTs.…”

Section: X-ray Diffraction Analysismentioning

confidence: 93%

Characterization of linear low‐density polyethylene and halloysite nanotube (LLDPE/HNT) composites based on two‐roll calendering melt fabrication

Baheri

Lindenberger

Sharma

et al. 2022

J of Applied Polymer Sci

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In preparation of polymer nanocomposites, achieving good mixing and uniform distribution of nanofillers is highly desired for property enhancement. Polyethylene (PE) and its nanocomposite with halloysite nanotubes (HNTs) possesses a myriad of potentials for advanced engineering properties. A high nanoparticle loading is preferred to capitalize the nano‐reinforcement, thermal, and barrier properties. The capability of a two‐roll calendaring machine to disperse HNT particles into a linear low‐density polyethylene (LLDPE) matrix at elevated processing temperatures was assessed. Morphological, thermal, mechanical, and rheological behavior of prepared nanocomposites were characterized. A homogeneous distribution of HNTs in concentrations up to 5 wt.% was evidenced by SEM analysis. TGA showed the 10 wt.% composite exhibited an overall outstanding thermal stability. DSC analysis revealed the 30 wt.% sample has the highest Tm and Tc, and the %crystallinity did not change much due to HNT incorporation for all samples. DMA showed the storage and loss moduli increased with increase in HNT loadings. The effect of loading HNTs into the LLDPE matrix on Tg was minimal, implying that LLDPE and HNTs are quite compatible. The results demonstrated that the two‐roll mill fabrication method can efficiently keep HNT particles unagglomerated and disperse them evenly into the LLDPE matrix.

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“…UHMWPE polymer chain size spans more than 30 times in comparison to other polyolefins. [1][2][3] Thus, UHMWPE has the highest specific tensile modulus and strength. 4,5 The degree of the crystallinity of the material plays a vital role in determining the physical and mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

Optimization study on wet electrostatic powder coating process to manufacture UHMWPE/LDPE towpregs

Khan

Goud

Alagirusamy

et al. 2022

Journal of Industrial Textiles

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In the present study, an attempt has been made to coat the non-conductive Ultra-high Molecular Weight Polyethylene (UHMWPE) fibers with Low-Density Polyethylene (LDPE) powder. In order to enable the deposition of electrostatically charged LDPE powder onto the fiber surface, UHMWPE fibers are dipped into a surface modification bath to impart momentary conductivity. Further, Box Behnken’s experimental design is used to optimize the processing parameters for Fiber Volume Fraction (Vf) for this wet electrostatic spray coating process. An experimental multi-parametric equation is acquired through response surface methodology to ascertain the association amid the process parameters such as processing temperature (A), conveying air pressure (B), and gun nozzle angle (C) on the output response of Vf. The process parametric values for A, B, and C are varied from 225°C to 245°C, 0.2 bar to 0.4 bar, and 0° to 120° respectively. The Vf obtained is in the range of 37.02%–56.28% depending on the combination of process parametric values. Powder pick-up increases with an increase in the gun nozzle angle. An increase in conveying air pressure and temperature of the hot air oven leads to an increase in powder deposition. The values predicted from the model are observed to be in close proximity (94.59%) to the experimental results. Gun nozzle angle is the principal parameter affecting the matrix deposition on the fiber surface in comparison to other process parameters.

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Effect of LLDPE on Aging Resistance and Thermal, Mechanical, Morphological Properties of UHMWPE/LLDPE Blends

Cited by 13 publications

References 26 publications

Morphology evolution and mechanical property enhancement of linear low‐density polyethylene by adding disentangled ultrahigh molecular weight polyethylene

Morphology evolution and mechanical property enhancement of linear low‐density polyethylene by adding disentangled ultrahigh molecular weight polyethylene

Characterization of linear low‐density polyethylene and halloysite nanotube (LLDPE/HNT) composites based on two‐roll calendering melt fabrication

Optimization study on wet electrostatic powder coating process to manufacture UHMWPE/LDPE towpregs

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