Physicomechanical, optical, barrier, and wide angle X‐ray scattering studies of filled low density polyethylene films

Siddaramaiah,; Guruprasad, K. H.; Nagaralli, R. T.; Somashekarappa, H.; Row, Tayur N. Guru; Somashekar, R.

doi:10.1002/app.23504

Cited by 13 publications

(5 citation statements)

References 22 publications

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“…This increase in the mechanical properties was due to the incorporation of vanillin in the LDPE matrix by uniform and homogeneous blending, which may act as a filler and induce reinforcing effect. These findings are in accordance with similar reports 35, 36…”

Section: Resultssupporting

confidence: 94%

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Blending of low‐density polyethylene with vanillin for improved barrier and aroma‐releasing properties in food packaging

Jagadish

Raj

Asha

2009

J of Applied Polymer Sci

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Modification of low-density polyethylene (LDPE) with vanillin to obtain flavored packaging film with improved gas barrier and flavor-releasing properties has been studied. The modification of LDPE with vanillin was monitored by Fourier transform infrared spectroscopy, wherein the appearance of new peaks at 1704.7, 1673.6, and 1597.2 cm À1 indicates the incorporation of vanillin into LDPE matrix. Films of uniform thickness were obtained by the extrusion of modified LDPE. Modified LDPE was found to have significantly higher gas barrier properties and grease resistance. Sensory quality of food products viz, doodhpeda (milk-based solid soft sweet), biscuit, and skimmed milk powder packed in LDPE-vanillin film showed that the doodhpeda sample had clearly perceptible vanilla aroma, whereas biscuit had marginal aroma and skimmed milk powder did not have noticeable aroma. When viewed in the light of imparting desirable vanilla aroma, results of the study indicated that LDPE-vanillin film has better prospects as a packaging material for solid sweets with considerable fat content when stored under ambient conditions. The release of vanilla aroma was further confirmed by gas chromatography-mass spectrometery analysis.

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Section: Resultssupporting

confidence: 94%

“…Haze values increased from 13.5 in LDPE to 28 in LDPE–vanillin films. The increase in haze after incorporation of vanillin into the LDPE matrix could be due to the scattering or diffusion of light radiation by vanillin 21, 36, 37…”

Section: Resultsmentioning

confidence: 99%

Blending of low‐density polyethylene with vanillin for improved barrier and aroma‐releasing properties in food packaging

Jagadish

Raj

Asha

2009

J of Applied Polymer Sci

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“…The haze values increased from 82.2 to 88.1 as the starch content enhanced from 0% to 40% in PEO/starch‐blended films as observed in Table II. The increase in haze after incorporation of starch into the PEO matrix could be due to the scattering or diffusion of light radiation by starch 7, 22, 24…”

Section: Resultsmentioning

confidence: 99%

Structure property relations in polyethylene oxide/starch blended films using WAXS techniques

Jagadish

Raj

Parameswara

et al. 2012

J of Applied Polymer Sci

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A series of polyethylene oxide (PEO)/starch blends were prepared by extrusion and their films were prepared by compression molding. It was observed that the presence of characteristic peaks of PEO and starch at 845 and 1643.7 cm À1 , respectively, in FTIR spectra of PEO/starch blends favors the blending of PEO/starch. The physicomechanical and optical properties of PEO/starch-blended films were measured. The tensile strength of the blended films decreased, whereas the haze values increased with an enhanced starch concentration in PEO/starch blends. The results obtained were correlated with microstructural parameters such as, crystallite size and lattice strain determined using wide angle X-ray scattering (WAXS) data. The X-ray line profile analysis shows that the crystallite shape area is maximum in PEO and decreases with the addition of starch.

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“…The LDPE control specimen exhibits two isotropic rings (Figure e). The first ring at (2θ = 21.33°) and the second ring at (2θ = 23.66°), corresponding to (110) and (200) planes in the orthorhombic crystal structure of polyethylene, imply that the LDPE lamellae are randomly oriented (i.e., in an isotropic fashion) in the extruded monolayer film. Figure i,j depicts the 1D profiles for coextruded LDPE/PS and LDPE/PC multilayers, respectively.…”

Section: Resultsmentioning

confidence: 99%

Fabrication of Architectured Multilayers with Mismatched Rheological Behaviors: Layer Stability, Structure, and Confinement Dictate Polyethylene-Based Film Properties

Li,

Touil,

Sudre

et al. 2024

Ind. Eng. Chem. Res.

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To better understand the processing and final properties of multilayer films obtained by layer forced assembly in coextrusion as well as their structure morphology, the present study focuses on model films with LDPE as the base polymer. More specifically, the layer confinement of LDPE by a glassy amorphous polymer (here, PC or PS) was investigated. First, the viscosity and elasticity ratios of the different neat polymers were measured by rheological tests to simulate the processing conditions in the feedblock and multipliers during coextrusion. These results together with the observation of film transparency at the macroscopic scale and the layer breakup phenomena between layers at the microscopic scale enabled us to build a comprehensive stability map rationalizing the conditions required for a well-controlled multinanolayer architecture. Second, the morphology of the coextruded films was analyzed by SEM and TEM. The onset of the layer breakup in the LDPE/PS system was determined at 2048 layers with a layer thickness of 95 nm, while in the LDPE/PC system, it was at 256 layers with a layer thickness of 980 nm. The layer breakup happened at a fewer number of layers for the LDPE/PC system due to the viscoelastic mismatched properties between the base polymers. Interestingly, we have demonstrated that it is nonetheless possible to prepare some nanolayer structures with 16,380 layers of the PS/LDPE system with some defects but still maintain an overall property improvement despite their high mismatched viscoelastic properties. Finally, the orientation and crystalline structure of the coextruded films were characterized by 2D-WAXS and DSC, and the ultimate properties of the films were determined through tensile testing. The geometrical confinement of the LDPE nanolayer did not affect the thermal crystalline properties of LDPE chains, but it affected the crystalline morphologies as well as the final mechanical response of the obtained multilayer films.

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Physicomechanical, optical, barrier, and wide angle X‐ray scattering studies of filled low density polyethylene films

Cited by 13 publications

References 22 publications

Blending of low‐density polyethylene with vanillin for improved barrier and aroma‐releasing properties in food packaging

Blending of low‐density polyethylene with vanillin for improved barrier and aroma‐releasing properties in food packaging

Structure property relations in polyethylene oxide/starch blended films using WAXS techniques

Fabrication of Architectured Multilayers with Mismatched Rheological Behaviors: Layer Stability, Structure, and Confinement Dictate Polyethylene-Based Film Properties

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