Environmentally degradable sago starch filled low-density polyethylene

2015 ◽  
Vol 35 (6) ◽  
pp. 551-563 ◽  
Author(s):  
Mohammad Dalour Hossen Beg ◽  
Shaharuddin Kormin ◽  
Mohd Bijarimi ◽  
Haydar U. Zaman
Keyword(s):  
Tensile Properties ◽  
Starch Content ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Sago Starch ◽  
Twin Screw Extrusion ◽  
Blend Films ◽  
Screw Extrusion ◽  
Twin Screw ◽  
High Starch

Abstract Degradable native low density polyethylene (LDPE) and modified LDPE films containing 5–30 wt% of sago starch, and LDPE with prodegradant additives in the form of a master batch (MB) in the amounts of 30% starch were prepared by twin screw extrusion followed by injection molding. Studies on their mechanical properties such as tensile strength and elongation at break and biodegradation were carried out by tensile test and exposure to hydrolysis, fungi environment as well as by natural weathering and burial in soil. The presence of high starch contents had an adverse effect on the tensile properties of the blend films. High starch content was also found to increase the rate of biodegradability of the films. The characteristic parameters of the environment were measured during the period of degradation and their influence on degradation of LDPE was discussed. Changes in weight, morphology, thermogravimetric analysis (TGA) and tensile properties of polymer samples were tested during the experiment performed.

scholarly journals Well-Dispersed Cellulose Nanofiber in Low Density Polyethylene Nanocomposite by Liquid-Assisted Extrusion

Polymers ◽  
2020 ◽  
Vol 12 (4) ◽  
pp. 927 ◽  
Author(s):  
Tengku Arisyah Tengku Yasim-Anuar ◽  
Hidayah Ariffin ◽  
Mohd Nor Faiz Norrrahim ◽  
Mohd Ali Hassan ◽  
Yoshito Andou ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Morphological Analysis ◽  
Cellulose Nanofiber ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Melt Blending ◽  
Twin Screw Extrusion ◽  
Liquid Feeding ◽  
Screw Extrusion ◽  
Twin Screw

Two different liquid assisted processing methods: internal melt-blending (IMB) and twin-screw extrusion (TWS) were performed to fabricate polyethylene (PE)/cellulose nanofiber (CNF) nanocomposites. The nanocomposites consisted maleic anhydride-grafted PE (PEgMA) as a compatibilizer, with PE/PEgMA/CNF ratio of 97/3/0.5–5 (wt./wt./wt.), respectively. Morphological analysis exhibited that CNF was well-dispersed in nanocomposites prepared by liquid-assisted TWS. Meanwhile, a randomly oriented and agglomerated CNF was observed in the nanocomposites prepared by liquid-assisted IMB. The nanocomposites obtained from liquid-assisted TWS exhibited the best mechanical properties at 3 wt.% CNF addition with an increment in flexural strength by almost 139%, higher than that of liquid-assisted IMB. Results from this study indicated that liquid feeding of CNF assisted the homogenous dispersion of CNF in PE matrix, and the mechanical properties of the nanocomposites were affected by compounding method due to the CNF dispersion and alignment.

Low Density Polyethylene (LDPE)/Thermoplastic Sago Starch (TPSS) Blend Filled with Kenaf Core Fiber (KCF)

2012 ◽  
Vol 626 ◽  
pp. 1048-1053
Author(s):  
Norshahida Sarifuddin ◽  
Hanafi Ismail ◽  
Ahmad Zuraida
Keyword(s):  
Starch Content ◽  
Experimental Result ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Sago Starch ◽  
Elongation At Break ◽  
Kenaf Core ◽  
Blending Method ◽  
Core Fiber ◽  
Hydrocarbon Polymer

Recently, blending of common hydrocarbon polymer with natural based materials has gain much interest towards the development of degradable composite. In this study, a series of low density polyethylene (LDPE)/thermoplastic sago starch (TPSS) blend reinforced with kenaf core fiber (KCF) with starch content ranging from 10 to 40 % were prepared via melt-blending method. For this study, kenaf loading was fixed at 20 % (by weight). The blended samples were characterized by means of tensile test and morphological study. The experimental result shows that there is a gradual decrease in tensile strength, modulus and elongation at break with increase in starch loading. The scanning electron micrograph (SEM) supports the findings of tensile properties.

Effects of different starch types on the physico-mechanical and morphological properties of low density polyethylene composites

2015 ◽  
Vol 35 (8) ◽  
pp. 793-804 ◽  
Author(s):  
Md. Dalour Hossen Beg ◽  
Shaharuddin Bin Kormin ◽  
Mohd Bijarimi ◽  
Haydar U. Zaman
Keyword(s):  
Mechanical Properties ◽  
Impact Strength ◽  
Water Absorption ◽  
Starch Content ◽  
Flexural Modulus ◽  
Morphological Properties ◽  
Low Density Polyethylene ◽  
Flow Index ◽  
Low Density ◽  
Sago Starch

Abstract The aim of this research is to investigate the effects of different thermoplastic starches and starch contents on the physico-mechanical and morphological properties of new polymeric-based composites from low density polyethylene (LDPE) and thermoplastic starches. Different compositions of thermoplastic starches (5–40 wt%) and LDPE were melt blended by extrusion and injection molding. The resultant materials were characterized with respect to the following parameters, i.e., melt flow index (MFI), mechanical properties (tensile, flexural, stiffness and impact strength) and water absorption. Scanning electron microscopy (SEM) was also used in this study for evaluating blend miscibility. MFI values of all blends decreased as the starch content increased, while the sago starch formulation showed a higher MFI value than others. The incorporation of fillers into LDPE matrix resulted in an increased in tensile modulus, flexural strength, flexural modulus and slightly decreased tensile strength and impact strength. However, sago starch filled composites exhibited better mechanical properties as compared to other starches. The SEM results revealed that the miscibility of such blends is dependent on the type of starch used. The water absorption increased with immersion time and the thermoplastic sago starch samples showed the lowest percentage of water absorption compared with other thermoplastic starches.

Characterization of Linear Low Density Polyethylene/Rambutan Peels Flour Blends: Effect of Loading Content

2016 ◽  
Vol 673 ◽  
pp. 171-179 ◽  
Author(s):  
A. Ainatun Nadhirah ◽  
S.T. Sam ◽  
N.Z. Noriman ◽  
Mohd Mustafa Al Bakri Abdullah ◽  
Mohd Firdaus Omar ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Tensile Properties ◽  
Testing Machine ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Linear Low Density Polyethylene ◽  
Screw Extruder ◽  
Twin Screw ◽  
Flour Blends

The effect of rambutan peels flour (RPF) content on the tensile properties of linear low density polyethylene filled with rambutan peel flour was studied. RPF was melt blended with linear low–density polyethylene (LLDPE). LLDPE/RPF blends were prepared by using twin screw extruder at 150°C with the flour content ranged from 0 to 25 wt%. The tensile properties were tested by using a universal testing machine (UTM) according to ASTM D638. The highest tensile strength was pure LLDPE meanwhile the tensile strength LLDPE/RPF decreased gradually with the addition of rambutan peels flour. Young’s modulus of rambutan peels flour filled LLDPE increased with increasing fiber loading. The crystallinity of the blends was significantly reduced with increasing RPF content. Instead, the water absorption increased with the addition of RPF content.

Tensile and Morphological Properties of Low Density Polyethylene/Spear Grass Composites

2013 ◽  
Vol 594-595 ◽  
pp. 715-719 ◽  
Author(s):  
S.T. Sam ◽  
P. Santhiya ◽  
S. Ragunathan ◽  
N.Z. Noriman ◽  
H. Ismail
Keyword(s):  
Natural Rubber ◽  
Tensile Properties ◽  
Morphological Analysis ◽  
Testing Machine ◽  
Tensile Modulus ◽  
Break Point ◽  
Morphological Properties ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Twin Screw

The spear grass content on the tensile properties, morphology of low-density polyethylene (LDPE)/spear grass was investigated. The compatibilising effect of epoxidised natural rubber (ENR 50) LDPE and spear grass was mixed by using twin screw extruder with various spear grass contents. The tensile properties were tested by using an Universal Testing Machine (UTM). The tensile strength and elongation at the break point were significantly improved by the addition of ENR 50, as evidenced by morphological analysis using scanning electron microscopy (SEM). On the other hand, the tensile modulus increased with spear grass content up to 10% and decreased thereafter.Keywords: Epoxidised Natural rubber (ENR), Low Density Polyethylene (LDPE), Spear Grass, Tensile Properties

Mechanical Properties of Chopped Carbon Fiber Reinforced PBS/CF Composites

2014 ◽  
Vol 989-994 ◽  
pp. 587-590
Author(s):  
Wei Li ◽  
Jin Ping Qu
Keyword(s):  
Mechanical Properties ◽  
Carbon Fiber ◽  
Tensile Properties ◽  
Flexural Properties ◽  
Fiber Reinforced ◽  
Twin Screw Extrusion ◽  
Impact Properties ◽  
Extrusion Processing ◽  
Screw Extrusion ◽  
Twin Screw

Chopped carbon fiber (CF) reinforced PBS/CF composites were prepared by twin-screw extrusion processing. The effect of adding a certain quantity of CF in composites on the tensile, flexural and impact properties have been investigated. The results indicated that the tensile properties, flexural properties and impact properties of the PBS/CF composites were first improved and then decreased with the increase of the content of CF.

Sign in / Sign up

Export Citation Format

Share Document