The Effect of Citric Acid on the Mechanical Properties of Thermoplastic Tapioca Starch/High Density Polyethylene/Natural Rubber Blends

2014 ◽  
Vol 679 ◽  
pp. 292-299
Author(s):  
Mohamad Kahar Ab Wahab ◽  
H. Ismail ◽  
N.Z. Noriman ◽  
H. Kamarudin ◽  
A.M. Mustafa Al Bakri
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Citric Acid ◽  
Natural Rubber ◽  
High Density Polyethylene ◽  
High Density ◽  
Elongation At Break ◽  
Tapioca Starch ◽  
Rubber Blends ◽  
Mechanical And Physical Properties

Effects of citric acid on the mechanical properties of thermoplastic tapioca starch/high density polyethylene/natural rubber (HDPE/NR/TPS) blends were investigated. The ratio between HDPE/NR was fixed at 70/30 and used as a matrix system. TPS loadings with and without modification with citric acid (CA) were varied from 0% to 30wt%. Mechanical and physical properties of blends were evaluated as a function of TPS loadings modified with and without CA. The tensile strength, Young’s modulus and elongation at break were found to decrease with increasing TPS content. However an improvement in the tensile strength for TPS modified with CA at 5%, 10% and 20% TPS loadings was observed. The degree of TPS adhesion and dispersion in HDPE/NR blends were determined by scanning electron microscope (SEM).Keywords; HDPE/NR/TPS, citric acid, tensile properties, morphology.

scholarly journals Preparation and modification of natural rubber blends for water purification treatment usage

2020 ◽  
Author(s):  
Wenfa Dong ◽  
Ruogu Tang
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Natural Rubber ◽  
Relative Volume ◽  
Curing Time ◽  
Water Industry ◽  
High Modulus ◽  
Elongation At Break ◽  
Tear Strength ◽  
Rubber Blends

<div>The water industry used NR was selected for blending with SBR. A series of NR/SBR vulcanizates were prepared through three different vulcanization systems, conventional vulcanization (CV), effective vulcanization (EV) and semi-effective vulcanization (SEV) respectively, basing on each formulation and optimum curing time. We examined the mechanical properties of NR/SBR vulcanizates including tensile strength, tear strength, elongation at break, modulus, Shore A hardnessand and relative volume abrasion. The results indicated that NR/SBR vulcanizates prepared in different systems differed in mechanical properties. Vulcanizates prepared via CV showed higher tensile and tear strength; vulcanizates prepared via EV had high modulus and hardness, and vulcanizates prepared via SEV performed high abrasion resistance. </div>

Tensile Properties of Wollastonite Filled High Density Polyethylene/Natural Rubber Composites

2015 ◽  
Vol 754-755 ◽  
pp. 215-219
Author(s):  
Ismail Yuhaida ◽  
Husseinsyah Salmah ◽  
Hanafi Ismail ◽  
Zainuddin Firuz
Keyword(s):  
Tensile Strength ◽  
Natural Rubber ◽  
Tensile Properties ◽  
High Density Polyethylene ◽  
High Density ◽  
Inorganic Filler ◽  
Rotor Speed ◽  
Rubber Composites ◽  
Elongation At Break ◽  
Natural Rubber Composites

Wollastonite is one type of inorganic filler. The effects of wollastonite loading on tensile properties of wollastonite (WS) filled high density polyethylene (HDPE)/Natural Rubber (NR) composites was studied. The HDPE/NR/WS composites were prepared by using Brabender EC Plus at a temperature of 180 °C with rotor speed of 50 rpm for 10 min. It was found that the increasing of wollastonite loading had decreased the tensile strength and elongation at break, whereas the Young’s modulus of the HDPE/NR/WS composites had increased with the increasing of wollastonite loading.

scholarly journals Mechanical Properties of Pineapple Leaf Powder Filled High Density Polyethylene

2016 ◽  
Vol 9 ◽  
pp. 13-19 ◽  
Author(s):  
Innocent Ochiagha Eze ◽  
Isaac O. Igwe ◽  
Okoro Ogbobe ◽  
Emmanuel Enyioma Anyanwu ◽  
Ikenna Nwachukwu
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
High Density Polyethylene ◽  
Filler Content ◽  
Agricultural Waste ◽  
Tensile Modulus ◽  
Mechanical Tests ◽  
High Density ◽  
Elongation At Break ◽  
Leaf Powder

The effects of pineapple leaf powder (PALP) on the mechanical properties of high density polyethylene (HDPE) composites were studied. HDPE and PALP composites were prepared by injection moulding technique. The filler (PALP) contents investigated were 2, 4, 6, 8, and 10 wt% for each formulation. Results of the mechanical tests carried out on the HDPE/PALP composites showed that the tensile strength, tensile modulus, flexural strength, abrasion resistance, and hardness of the composites increased with increases in filler content for all the filler contents investigated while the elongation at break (EB) for PALP/HDPE composites was found to decrease with increases in filler content for all the filler contents investigated. The tensile strength of PALP/HDPE composites was increased by 6.49% at 2 wt% filler content, and 30.39% at 10 wt% filler content. It was also observed, from the results, that the elongation at break of PALP/HDPE composites was decreased by 2.40% at 2 wt% filler content, and 10.24% at 10 wt% filler content. The present study has highlighted the utility of pineapple leaf powder (PALP) as reinforcing filler in HDPE compounding. Pineapple leave which is an agricultural waste has been shown to have potential as a cheap, more readily available and more environmentally friendly filler.

scholarly journals Preparation and Modification of Natural Rubber Blends Via Different Sulfur Curing Systems For Water Purification Treatment Usage

2020 ◽  
Author(s):  
Wenfa Dong ◽  
Ruogu Tang
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Natural Rubber ◽  
Relative Volume ◽  
Curing Time ◽  
Water Industry ◽  
High Modulus ◽  
Elongation At Break ◽  
Tear Strength ◽  
Rubber Blends

<div>The water industry used NR was selected for blending with SBR. A series of NR/SBR vulcanizates were prepared through three different vulcanization systems, conventional vulcanization (CV), effective vulcanization (EV) and semi-effective vulcanization (SEV) respectively, basing on each formulation and optimum curing time. We examined the mechanical properties of NR/SBR vulcanizates including tensile strength, tear strength, elongation at break, modulus, Shore A hardnessand and relative volume abrasion. The results indicated that NR/SBR vulcanizates prepared in different systems differed in mechanical properties. Vulcanizates prepared via CV showed higher tensile and tear strength; vulcanizates prepared via EV had high modulus and hardness, and vulcanizates prepared via SEV performed high abrasion resistance. </div>

scholarly journals Preparation and modification of natural rubber blends for water purification treatment usage

2020 ◽  
Author(s):  
Wenfa Dong ◽  
Ruogu Tang
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Natural Rubber ◽  
Relative Volume ◽  
Curing Time ◽  
Water Industry ◽  
High Modulus ◽  
Elongation At Break ◽  
Tear Strength ◽  
Rubber Blends

<div>The water industry used NR was selected for blending with SBR. A series of NR/SBR vulcanizates were prepared through three different vulcanization systems, conventional vulcanization (CV), effective vulcanization (EV) and semi-effective vulcanization (SEV) respectively, basing on each formulation and optimum curing time. We examined the mechanical properties of NR/SBR vulcanizates including tensile strength, tear strength, elongation at break, modulus, Shore A hardnessand and relative volume abrasion. The results indicated that NR/SBR vulcanizates prepared in different systems differed in mechanical properties. Vulcanizates prepared via CV showed higher tensile and tear strength; vulcanizates prepared via EV had high modulus and hardness, and vulcanizates prepared via SEV performed high abrasion resistance. </div>

Effects of Sawdust Content and Alkali Treatment on Mechanical and Flame Retarding Properties of Sawdust/Recycled High Density Polyethylene Composites

2014 ◽  
Vol 970 ◽  
pp. 79-83
Author(s):  
Rapisa Jarapanyacheep ◽  
Kasama Jarukumjorn
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Flame Retardancy ◽  
High Density Polyethylene ◽  
Interfacial Adhesion ◽  
Alkali Treatment ◽  
Tensile Modulus ◽  
High Density ◽  
Flexural Properties ◽  
Elongation At Break

Sawdust/recycled high density polyethylene (rHDPE) composites were prepared and their mechanical properties, flammability and morphology were investigated. Sawdust was used at contents of 30, 40 and 50 wt%. With increasing sawdust content, tensile strength and elongation at break of the composites decreased whereas tensile modulus increased. Flexural properties showed the same trend as tensile properties. Flammability of the composites enhanced with increasing sawdust content. Mechanical properties of alkali treated sawdust/rHDPE composites were higher than those of untreated sawdust/rHDPE composites at all sawdust contents. Moreover, alkali treatment improved flame retardancy of the composites. SEM micrographs showed that alkali treatment enhanced the interfacial adhesion between sawdust and rHDPE matrix.

Sign in / Sign up

Export Citation Format

Share Document