Processing and thermal, mechanical and morphological characterization of post-consumer polyolefins/thermoplastic starch blends

Rosa, Derval dos Santos; Guedes, C.G.F.; Carvalho, C. L. de

doi:10.1007/s10853-006-1049-9

Cited by 80 publications

(39 citation statements)

References 15 publications

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“…The researcher observed the crystallization by using the micrograph analysis [17]. Rosa et al observes the same behavior for high density polyethylene/polypropylene (HDPE/PP) starch blends [12]. These results are similarly shown in the previous work by Toh Wen et al which finds the same trend of the graph for the study on poly vinyl alcohol)/sago pith waste (SPW) [5].…”

Section: Resultssupporting

confidence: 62%

“…Starch is a natural carbohydrate storage material accumulated by green plants in the form of granules. It is composed of linear polysaccharide molecules (amylose) and branched molecules (amylopectin) that are attractive raw material for use as barriers in packing materials [12]. The jackfruit seeds starch compositions are moisture 13.0%, fat (0.64%), protein (0.32%), ash (0.22%), and amylose (28.1%) [12].…”

Section: Introductionmentioning

confidence: 99%

“…It is composed of linear polysaccharide molecules (amylose) and branched molecules (amylopectin) that are attractive raw material for use as barriers in packing materials [12]. The jackfruit seeds starch compositions are moisture 13.0%, fat (0.64%), protein (0.32%), ash (0.22%), and amylose (28.1%) [12]. Jackfruit's seeds comprise 90% of starch content [13].…”

Section: Introductionmentioning

confidence: 99%

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Mechanical Properties of Bioplastic From Jackfruit Seed Flour and Polypropylene

2018

MJAS

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In this study, the bioplastic was successfully fabricated from jackfruit seed flour/polypropylene blend. Nowadays, the plastic used are originally from petroleum, in which is limited resources and non-degradable polymer that causes environmental problem. The jackfruit (Artocarpus heterophyllus) has been commercially produced in the farming industry. Approximately 8 to 15 % of jackfruit are mostly thrown after consumption. Thus it can be used as the value added product development for future demand. In this study, the jackfruit seeds flour was plasticized by using glycerol, and blended with different ratios of polypropylene. The mechanical properties such as tensile strength, strain at break, flexibility and water absorption of fabricated bioplastic were investigated. The tensile strength and strain at break decreased with increasing of jackfruit seed flour content, while Young's Modulus increased with the jackfruit seed flour content increased. Addition of polypropylene demonstrated higher water resistant ability. The jackfruit seed can be a new resource of bioplastic that could be preserved as a petrochemical resource and reduces the environmental impact.Keyword: bioplastic, jackfruit seed, mechanical properties, polypropylene, water absorption Abstrak Dalam kajian ini, bioplastik berjaya dihasilkan dari campuran tepung biji nangka/polipropilena. Kini, plastik yang digunakan berasal daripada petroleum, di mana sumber yang terhad dan polimer yang tidak boleh degradasi yang menyebabkan masalah kepada alam sekitar. Buah nangka (Artocarpus heterophyllus) telah dihasilkan secara komersil dalam industri pertanian. Kirakira 8 hingga 15% daripada nangka dibuang selepas penggunaan. Oleh itu, ia boleh digunakan sebagai nilai tambah produk untuk permintaan masa depan. Dalam kajian ini, tepung biji nangka telah diplastikkan dengan menggunakan gliserol, dan dicampur dengan polipropilena dengan nisbah yang berlainan. Sifat-sifat mekanik seperti kekuatan tegangan, ketegangan pada rehat, fleksibiliti dan penyerapan air bioplastik dikaji. Kekuatan tegangan dan ketegangan pada rehat menurun dengan peningkatan kandungan tepung biji nangka, sementara Modulus Young meningkat dengan kandungan tepung biji nangka meningkat. Penambahan polipropilena menunjukkan keupayaan tahan air yang lebih tinggi. Biji nangka dapat menjadi sumber bioplastik baru yang dapat dipelihara sebagai sumber petrokimia dan mengurangkan kesan kepada persekitaran.

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Section: Resultssupporting

confidence: 62%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Mechanical Properties of Bioplastic From Jackfruit Seed Flour and Polypropylene

2018

MJAS

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“…However, the major disadvantage of blending natural polymers into synthetic polymers is their compatibility, resulting in the poor interaction between matrix and filler interphase; this in turn results in inferior mechanical properties [31][32][33]. Moreover, the natural polymers cause processability problems during production of films from the blends [33].…”

Section: Introductionmentioning

confidence: 99%

Mechanical and morphological properties of high density polyethylene and polylactide blends

Madhu

Bhunia

Bajpai

et al. 2014

Journal of Polymer Engineering

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Polyblend films were prepared from high-density polyethylene (HDPE) and poly(l-lactic acid) (PLLA) up to 20% PLLA by the melt blending method in an extrusion mixer with post-extrusion blown film attachment. The 80/20 (HDPE/PLLA) blend was compatibilized with maleic anhydride grafted polyethylene (PE-g-MA) in varying ratios [up to 8 parts per hundred of resin (phr)]. Tensile properties of the films were evaluated to obtain optimized composition for packaging applications of both non-compatibilized and compatibilized blends. The compositions HDPE80 (80% HDPE and 20% PLLA) and HD80C4 (80% HDPE, 20% PLLA and 4 phr compatibilizer) were found to be optimum for packaging applications. However, better tensile strength (at yield) and elongation (at break) of 80/20 (HDPE/PLLA) blend were noticed in the presence of PE-g-MA. Further, thermal properties and morphologies of these blends were evaluated. Differential scanning calorimetry (DSC) study revealed that blending does not much affect the crystalline melting point of HDPE and PLLA, but heat of fusion of 80/20 (HDPE/PLLA) blend was decreased as compared to that of neat HDPE. Spectroscopy studies showed evidence of the introduction of some new groups in the blends and gaining compatibility in the presence of PE-g-MA. The compatibilizer influenced the morphology of the blends, as apparent from scanning electron microscopy (SEM) and supported by Fourier transform infrared (FTIR).

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“…This kind of starch composites is called thermo plastic starch (TPS). Several plasticizers have been used for plasticization process to convert starch into TPS to be used in polymer blends such as glycerol [12][13][14][15][16][17][18][19][20][21], water [21,22], urea [23][24][25], formamide [22,[24][25][26], ethylenebisformamide [27][28][29], sorbitol [27,30], citric acid [31], N (2 hydroxyethyl)forma mide [32] and amino acids [20,33]. Water is more ef fective as a plasticizer than glycerol, but the most used plasticizer in TPS preparation is glycerol due to its high boiling point, availability, and low cost.…”

Section: Introductionmentioning

confidence: 99%

Thermoplastic starch blends: A review of recent works

2012

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The aim of this review is to discuss the recent developments in thermoplastic starch blends. Starch has been considered as an excellent candidate to partially substitute synthetic polymer in packaging, agricul tural mulch and other low cost applications. Recently, the starch granules were plasticized using different plasticizers under heating and shearing, giving rise to a continues phase in the form of a viscous melt which can be processed using traditional plastic processing techniques, such as injection molding and extrusion. This kind of starch composites is called thermoplastic starch. Unfortunately, thermoplastic starch presents some drawbacks, such as low degradation temperatures, which make it difficult to process, poor mechanical properties and high water susceptibility. Much work has been carried out to overcome these drawbacks, including the combination of thermoplastic starch with other polymers, aiming at lowering the cost and enhancing the biodegradability of the final product.

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Processing and thermal, mechanical and morphological characterization of post-consumer polyolefins/thermoplastic starch blends

Cited by 80 publications

References 15 publications

Mechanical Properties of Bioplastic From Jackfruit Seed Flour and Polypropylene

Mechanical Properties of Bioplastic From Jackfruit Seed Flour and Polypropylene

Mechanical and morphological properties of high density polyethylene and polylactide blends

Thermoplastic starch blends: A review of recent works

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