Study and development of LDPE/starch partially biodegradable compounds

Nakamura, Etsuko; Cordi, Lı́via; Almeida, Giana; Durán, Nelsón; Mei, Lucia H. I.

doi:10.1016/j.jmatprotec.2005.02.007

Cited by 82 publications

(47 citation statements)

References 29 publications

(7 reference statements)

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“…However, the addition of such plasticizers could not sufficient to completely eliminate the weaknesses in dispersion, gloss, transparency, and mechanical properties such as tensile strength and tear strength, and gas barrier properties [22,23]. To overcome these problems caused by incompatibility in LDPE/starch blends, there have been various approaches including modification of starch such as stearic acid-grafted starch, adipate starch, acetylated starch and phthalate starch [24][25][26], the use of a compatibilizer, which have reactive groups such as maleic anhydride, maleate esters, glycidyl methacrylate and hydroxyl [8,13,22,27] and the use of a crosslinking agent [18,28].…”

Section: Introductionmentioning

confidence: 99%

Thermal, Mechanical and Antibacterial Properties of Ldpe/Starch Bio-Based Polymer Blends for Food Packing Applications

Yamak¹

2016

Journal of the Turkish Chemical Society, Section A: Chemistry

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Abstract:In this study, low density polyethylene (LDPE) was melt-blended with starch using twin screw extruder to form biodegradable polymer blends. The LDPE/starch blend films used in food packing were obtained by hot pressing of the granules produced by extrusion process. The starch content was varied from 0 to 40 wt% of LDPE. To provide fine starch dispersion, glycerol and zinc stearate were used as plasticizer and compatibilizer, respectively. The effect of starch content on the properties of LDPE film was investigated. A good dispersion was achieved for low starch contents (10 and 20 wt%), but agglomeration of the starch particles occurred in the presence of high amounts of starch (>20 wt%). The addition of starch to LDPE reduced the tensile strength, elongation at break, crystallinity, and water resistance of LDPE. This decline in the LDPE properties was dramatic when the starch content was increased to 30 wt% in the blend. In addition, silver nanoparticles as antibacterial agent were incorporated to the biodegradable LDPE blends where LDPE/starch weight ratio of 60/40. The effects of these nanoparticles on morphological, mechanical, thermal and water resistance properties of the LDPE/starch biodegradable blends were investigated. It was observed that the incorporation of nanoparticles to the LDPE/starch blend was completely changed the morphology of the film, and accordingly, the mechanical, thermal, and water resistance properties were varied depending on the silver nanoparticle content in LDPE/starch blend film. Moreover, antibacterial activities of the nanocomposite films against gram-negative bacteria (E. coli) and grampositive bacteria (S. aureus) were determined by measuring the inhibition zone around each film. However, the nanocomposite films did not show any antibacterial activities in the presence of silver nanoparticles as an antibacterial agent.

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Section: Introductionmentioning

confidence: 99%

Thermal, Mechanical and Antibacterial Properties of Ldpe/Starch Bio-Based Polymer Blends for Food Packing Applications

Yamak¹

2016

Journal of the Turkish Chemical Society, Section A: Chemistry

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“…Some researches [5][6][7][8][9] were focused on analysing the thermal, mechanical and biodegradation performance of LDPE films with different type and content of biodegradable material. But these works did not analyse the performance of these new developed polymeric materials during printing or packaging processes.…”

Section: Introductionmentioning

confidence: 99%

Study of defectoscopy of partially biodegradable LDPE films

Kibirkštis¹,

Miliūnas²,

Vaitasius³

et al. 2017

Vib. proced.

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Physical characteristics of the loaded new developed partially biodegradable LDPE polymeric films (containing sorbit, molasses and chitosan additives) with defects and without have been investigated experimentally by using the method of projection moiré. The first eigenmodes are analysed, graphical results of their investigation are presented. It was determined that the shape of the first vibrations eigenmode and the characteristics of vibrations have changed when the polymeric film had a tear defect. The results obtained could be applied for the determination of characteristics and qualities of new developed LDPE polymeric films.

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“…Therefore it is not suggested burying plastics in soil and no common disposal strategy can be adopted for the different polyolefins [23]. The biodegradability of PE/starch blends was investigated by a great number of authors [23][24][25][26][27][28][29][30][31][32][33]. Ojeda and co-workers [34] believe in an increase in the biodegradation rate of polyethylenes containing pro-oxidant and having preliminary weathering.…”

Section: Introductionmentioning

confidence: 99%