Synthesis and investigation of polyethylene blends with natural polysaccharides and their derivatives

Роговина, С. З.; Aleksanyan, K. V.; Novikov, D. D.; Прут, Э. В.; Ребров, А. В.

doi:10.1134/s0965545x09050101

Cited by 29 publications

(27 citation statements)

References 7 publications

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“…The addition of chitosan significantly decreases the tensile strength and elongation of the blown films compared with neat LLDPE and LLDPE/LLDPE-g-MAH (with 10% LLDPE-g-MAH only). This tendency is similar to that of LLDPE/chitosan blends, 23,24 which mainly caused by the poor miscibility between LLDPE and chitosan. Pedroso and Rosa also declared that a little or no interface interaction between LLDPE and chitosan may lead to the decrease of tensile strength, which in turn can cause rupture of the material at interphase.…”

Section: Stress-strain Mechanical Propertiessupporting

confidence: 73%

Mechanical and Barrier Properties of LLDPE/Chitosan Blown Films for Packaging

Wang

Chen

Chuai

2015

Packag. Technol. Sci.

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The blends of linear low-density polyethylene and chitosan were prepared by using a two-step meltcompounding process and then were made into blown films for packaging. LLDPE-g-MAH was used as compatilizer to enhance the dispersing effect of chitosan in the matrix. Fourier transform infrared spectra and scanning electron microscope images of the blown films confirmed that there were new amide bonds formed between chitosan and LLDPE-g-MAH. The mechanical and barrier properties of the LLDPE/chitosan blown films were investigated. The result indicated that the breaking strength and elongation decreased as the chitosan content increased. In addition, the water vapour permeability of the blend films could be improved up to 200% with the increment of chitosan content, and the oxygen permeability decreased about 20% compared with the films without chitosan. It was found that LLDPE-g-MAH had obvious effects on the mechanical properties and oxygen permeability apart from the water vapour resistance.

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Section: Stress-strain Mechanical Propertiessupporting

confidence: 73%

Mechanical and Barrier Properties of LLDPE/Chitosan Blown Films for Packaging

Wang

Chen

Chuai

2015

Packag. Technol. Sci.

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“…The mixing of LDPE and PLA was carried out at 130 °C in a rotor disperser based on a single‐screw extruder under conditions of shear deformations (the screw diameter of 32 mm, the length to diameter ratio is equal to 11, and the rotation velocity of 45 rpm). To create shear deformations, the rotor disperser has a grinding head designed as a cam element rotating inside a channeled cylinder and equipped with a cooling jacket …”

Section: Methodsmentioning

confidence: 99%

Production and investigation of structure and properties of polyethylene–polylactide composites

Роговина

Прут

Aleksanyan

et al. 2019

J of Applied Polymer Sci

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Under conditions of shear deformations, low‐density polyethylene (LDPE) and polylactide (PLA) composites are obtained in rotor disperser. The production of these composites allows one to use polymers derived from natural raw and to reduce the cost of the materials on their base. The addition of rigid PLA leads to increase in elastic modulus from 200 for LDPE to 1190 for LDPE–PLA (50:50 wt %) composites and in tensile strength from 13.3 for LDPE to 17.8 for LDPE–PLA. By differential scanning calorimetry method, it is shown that LDPE and PLA are incompatible. Using X‐ray diffraction analysis, it is found that degree of crystallinity of composites decreases from 46.1 at 50:50 wt % to 36.9 at 80:20 wt % component ratios with the rise in LDPE content. Tests on fungus resistance show that the composites containing 50 wt % PLA are more resistant than the composites containing 30 wt % PLA. First by gel‐permeation chromatography method, it is shown that composite degradation after exposure in soil is accompanied by the PLA chain scission and depolymerization with formation of monomers and dimers (M w of PLA decreases from 118,860 to 80,100). The obtained composites can be applied as packaging materials. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47598.

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“…Soy flour, which contains 36%–56% protein and up to 35% carbohydrates, is a renewable, inexpensive material which can be used as a bio‐based filler in polyolefin matrices . Literature studies indicate that some of the polysaccharides that have been incorporated into polyolefin matrices behave as component of the blend and not merely as fillers. The dispersion and property enhancements in soy flour/PP/linear low density PE (LLDPE) composites were reported by Iyer and Torkelson .…”

Section: Introductionmentioning

confidence: 99%

Soy‐filled polyethylene fibers for modified surface and hydrophilic characteristics

Güzdemir¹,

Lukubira²,

Ogale³

2018

J of Applied Polymer Sci

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By adding soy flour (soy) to linear low‐density polyethylene (LLDPE), soy‐PE fibers with enhanced hydrophilic characteristics were developed. Blends containing only soy and LLDPE had limited draw‐down, and the resulting thick fibers showed poor mechanical properties. When monoglyceride was added as a compatibilizer, thin fibers with good properties could be successfully spun due to improved dispersion of soy agglomerates in the LLDPE melt. Fibers spun from a blend containing 23/7/70 wt % of soy‐monoglyceride‐LLDPE displayed a tensile modulus and strength of 615 ± 38 and 57 ± 8 MPa, respectively. At 30% less synthetic content, these fibers still displayed mechanical properties generally comparable to those of base polyethylene fibers. Contact angle measurements showed that the soy‐based fibers had a hydrophilic surface (contact angle of 33° ± 4°). Moisture absorption studies confirmed that soy‐PE fibers gained about 20 wt % moisture in 1 h, whereas neat LLDPE fibers did not absorb any significant amount (LLDPE is hydrophobic). This hydrophilic behavior of soy‐PE fibers mimics that of natural fibers. Presence small soy agglomerates on the fiber surface also provides a textured surface and a desired tactile feel to the soy‐PE fibers, which coupled with hydrophilic behavior indicates their potential use in disposable nonwovens. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46609.

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Synthesis and investigation of polyethylene blends with natural polysaccharides and their derivatives

Cited by 29 publications

References 7 publications

Mechanical and Barrier Properties of LLDPE/Chitosan Blown Films for Packaging

Mechanical and Barrier Properties of LLDPE/Chitosan Blown Films for Packaging

Production and investigation of structure and properties of polyethylene–polylactide composites

Soy‐filled polyethylene fibers for modified surface and hydrophilic characteristics

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