scholarly journals Recycling of Cooking Oil Waste into Reactive Polyurethane for Blending with Thermoplastic Polyethylene

2015 ◽  
Vol 2015 ◽  
pp. 1-10
Author(s):  
Anika Zafiah M. Rus ◽  
N. Syamimi M. Salim ◽  
N. Haiza Sapiee
Keyword(s):  
Injection Molding ◽  
High Density Polyethylene ◽  
Waste Cooking Oil ◽  
The Other ◽  
Processing Temperature ◽  
Mechanical Behaviors ◽  
Melt Mixing ◽  
Cooking Oil ◽  
Better Than

Driven by the need of growing to a more sustainable and environmentally friendly future, this research is started by mixing in-house produced biorenewable polymers (BP) from waste cooking oil with the standard low density polyethylene (LDPE) and high density polyethylene (HDPE) via melt-mixing at low ratios. These mixtures are then compounded via injection molding to produce tensile samples. By using the quality of individual compounds injected, the parameters obtained for all ratios of LDPE/BP were the same with neat LDPE whereas some adjustments were required for the HDPE/BP compounds. The corresponding mechanical behaviors of each ratio were also examined and the results showed that both tensile strength and strain of the LDPE/BP were better than neat LDPE. On the other hand, increasing the BP content in HDPE/BP will increase the toughness of the compound if compared to neat HDPE. Therefore, not only does the presence of BP provide renewable properties, but it also improves the mechanical properties. Moreover, the processing temperature and composition of BP will both influence the quality and mechanical behavior of the product made. Thus, this study may aid any intention on processing these in-house produced polymers by injection molding.

Processing Temperature of Sustainable Polymer with Thermoplastics by Injection Moulding (Part 1)

2015 ◽  
Vol 799-800 ◽  
pp. 67-71
Author(s):  
Anika Zafiah Mohd Rus ◽  
Nurul Syamimi M. Salim ◽  
N. Haiza Sapiee
Keyword(s):  
Injection Molding ◽  
Waste Cooking Oil ◽  
Low Density Polyethylene ◽  
Processing Temperature ◽  
Mechanical Behaviors ◽  
Melt Mixing ◽  
Cooking Oil ◽  
Biodegradable Properties ◽  
Better Than

This research is started by mixing in-house produced sustainable polymers (SP) from waste cooking oil with the standard low density polyethylene (LDPE) via melt-mixing at low ratios. These mixtures are then compounded via injection molding to produce tensile samples according to ISO 527 (5A). The parameters used in injection molding were initially set to follow the parameters of neat LDPE. Fortunately, by using the quality of individual compounds injected, the parameters obtained for all ratios were the same with neat LDPE. The corresponding mechanical behaviors of each ratio were also examined and the results showed that both tensile strength and strain of the LDPE/SP were better than neat LDPE. Therefore, not only does the presence of SP provide biodegradable properties, but it also improves the mechanical properties. It was concluded that the processing temperature and composition of SP will both influence the quality and mechanical behavior of the product made. This study may aid any intention on processing these in-house produced polymers by injection molding.

Processing Temperature of Sustainable Polymer with Thermoplastics by Injection Molding (Part 2)

2015 ◽  
Vol 789-790 ◽  
pp. 85-89
Author(s):  
Anika Zafiah Mohd Rus ◽  
Nurul Syamimi M. Salim ◽  
N. Haiza Sapiee
Keyword(s):  
Injection Molding ◽  
High Density Polyethylene ◽  
Waste Cooking Oil ◽  
Processing Temperature ◽  
Processing Conditions ◽  
Molding Machine ◽  
Melt Mixing ◽  
Cooking Oil ◽  
Waste Vegetable Oil ◽  
The World

Moving to a more sustainable and healthy future, the world has decided to invest on researches to make good use of waste vegetable oil rather than letting them clog the drains and hence, polluting the environment. One of the useful projects which uses these waste cooking oil is to synthesize polyols. Solidifying the polyols using cross linker produces a Sustainable Polymer (SP). These SP are compounded with the High-Density Polyethylene (HDPE) by melt-mixing using injection molding machine. Injection molding is capable of producing many useful products. Therefore, aiming to analyse the processing conditions of injection molding, the corresponding mechanical properties of the compounds produced were examined. The results indicated that increasing the SP content will increase the toughness of the compound if compared to neat HDPE. It was concluded that the processing temperature and composition of SP will both influence the quality and mechanical behavior of the injected polymer compounds.

Effects of over Heat and Casting Speed on Quality of GCr15 Billet

2014 ◽  
Vol 997 ◽  
pp. 534-537 ◽  
Author(s):  
Qi Wei Zuo ◽  
Xia An ◽  
Jing Bo Yang ◽  
Da Qiang Cang
Keyword(s):  
Casting Speed ◽  
The Other ◽  
Steel Making ◽  
Average Grade ◽  
Upset Forging ◽  
C 30 ◽  
Better Than ◽  
Center Porosity

In order to improve the quality of the billets, the whole test proceedings by the comparison of the two casting conditions which one is over heat 20°C-30°C under casting speed 0.4m/min-0.6m/min and the other is over heat 10°C-15 °C under casting speed 1.3m/min-1.6m/min are checked during the produce process of GCr15 in some domestic steel-making plant. The results show that the average grade of general porosity decreases 1.0, the average grade of center porosity down 0.5, the average grade of center segregation fall 0.5 and the samples tested in hot upset forging perform better than before. According to the results, the latter is determined to be accepted.

scholarly journals PERBANDINGAN KUALITAS PRODUK DAN MINAT MENABUNG PADA LPD DESA ADAT TAJUN DENGAN DESA ADAT TEGAL

2020 ◽  
Vol 4 (1) ◽  
pp. 59-67
Author(s):  
Eka Swarnadi Luh ◽  
Ketut Budi Susrusa ◽  
Ida Ayu Listia Dewi
Keyword(s):  
Product Quality ◽  
Financial Institutions ◽  
Rapid Development ◽  
Research Data ◽  
The Other ◽  
Physical Evidence ◽  
Significant Difference ◽  
The Difference ◽  
Better Than

LPDs are non-bank financial institutions that are regulated and approved by the Regional Regulations of the Province of Bali. The management of LPD is fully handed over to the relevant Pakraman village. In line with the rapid development of LPDs, it turns out that on the other hand it shows diverse performance, so that LPDs need to pay attention to the level of product quality and customer interest in the products offered.            The purpose of the study was to determine the comparison of product quality and interest in saving at the Tajun Traditional Village LPD with the Traditional Village of Tegal. The number of samples from Tajun Adat Village LPD was 98 people and the LPD of Tegal Traditional Village was 84 people. The research data were analyzed by the Mann-Whitney Test. The results showed that there was a significant difference between the quality of the products of the Adat Village of Tajun LPD and the Traditional Village of Tegal. This difference is indicated by indicators of physical evidence, reliability, responsiveness and empathy. The product quality of Tajun Adat Village's LPD is better than the traditional village of Tegal. There is a significant difference between the interest in saving the traditional village of Tajun LPD and the traditional village of Tegal. The difference is in the indicator of confidence. Interest in Saving Tajun Indigenous Village LPD is higher than the Traditional Village of Tegal.

Filling-to-Packing Switchover Mode Based on Cavity Pressure for Injection Molding

2012 ◽  
Vol 501 ◽  
pp. 168-173 ◽  
Author(s):  
Jian Wang
Keyword(s):  
Injection Molding ◽  
Crucial Role ◽  
Mold Temperature ◽  
The Other ◽  
Injection Time ◽  
Cavity Pressure ◽  
Part Quality ◽  
Molded Parts ◽  
Screw Position

Filling-to-packing switchover control during injection molding plays a crucial role in ensuring the quality of the molded parts. In this study, a filling-to-packing switchover mode based on cavity pressure was presented, and it was compared with other two switchover modes by injection time and screw position. The objective of this study was to validate the accuracy of the switchover mode based on cavity pressure, and examine its consistency. Weight of the molded parts served as the main measure to probe the process capabilities. In this study, the change in mold temperature was monitored; variation of mold temperature affecting the process was examined. The results of the verification experiments revealed that the switchover mode based on cavity pressure could yield a better part quality and consistent part weight compared with the other two traditional switchover modes. It was proved that the switchover mode by cavity pressure can be used to improve the precision of the injection molding. However, a suitable switchover pressure must be used for achieving such high process capability, and the position to get the pressure signal and mold temperature should also be considered.

Intermittent Microwave Drying of Litchi: Drying Kinetics and Quality Formation in Color Difference

2012 ◽  
Vol 482-484 ◽  
pp. 2090-2095 ◽  
Author(s):  
Feng Ying Xu ◽  
Zhen Chen ◽  
Chang You Li ◽  
Jian Yuan Liao ◽  
Han Zhang ◽  
...  
Keyword(s):  
Multilayer Structure ◽  
Small Amplitude ◽  
Color Difference ◽  
The Other ◽  
Microwave Drying ◽  
Drying Process ◽  
Biochemical Effect ◽  
Thermal Transmission ◽  
Better Than

In order to reveal the characteristics of thermal transmission and drying quality on the litchi’s multilayer structure, the peel and flesh that separated from fresh fruit were dried with the whole fruit by microwave radiation in three kinds of tempering intermittent HT0101, HT0505 and HT1010. Their characteristics of dehydration and the changes of color difference in drying process were compared. The results showed that microwave drying had influences on the capability of dehydration and the quality of color difference in different interval. The influence of HT0505 was more significant, while the other two conditions, in which there were only a small amplitude of cross and fluctuation, were approximate. In the same conditions of microwave drying, the capability of dehydration of peel and flesh separated was better than that of whole fruit, and the dehydration speed of peel was the fastest. As to color difference, the changes of peel and whole fruit were smaller and much easily to tend to stable. The change of the color difference on the flesh was obvious and finally tended to stable. The further research still needed the further study on biochemical effect during the transformation of quality.

scholarly journals EVALUATION OF WATER CONSERVATION POTENTIAL OF NON-TURF GROUNDCOVERS VS. KENTUCKY BLUEGRASS UNDER INCREASING LEVELS OF DROUGHT STRESS.

HortScience ◽  
1992 ◽  
Vol 27 (6) ◽  
pp. 676c-676
Author(s):  
David Staats ◽  
James E. Klett
Keyword(s):  
Drought Stress ◽  
Field Study ◽  
Water Conservation ◽  
Kentucky Bluegrass ◽  
Good Alternative ◽  
The Other ◽  
Irrigation Treatments ◽  
Better Than

In June 1991, a two year field study was initiated to examine if three non-turf groundcovers with reputations for using low amounts of water actually use less water than Kentucky bluegrass (KBG). Irrigation treatments were based on percentages of ET (100%, 75%, 50%, 25%, 0%) and calculated by the modified Penman equation. Results from the 1991 season indicate that at the 100% and 75% treatments Potentilla tabernaemontani and Cerastium tomentosum were significantly better than the other species in terms of establishment and vigor but quality declined significantly at rates below 75%. At the 50% rate both KBG and Sedum acre maintained good quality although growth was slow. At the 25% rate, quality of KBG significantly declined while Sedum acre maintained good quality. Quality of Sedum acre declined only slightly at the 0% treatment and would be a good alternative to KBG if water conservation was a high priority in the landscape.

scholarly journals Rejection Sampling Schemes for Simulating from Arbitrary Probability Densities

2020 ◽  
Vol 68 (1) ◽  
pp. 59-64
Author(s):  
Anamul Haque Sajib
Keyword(s):  
Monte Carlo ◽  
Computational Cost ◽  
The Other ◽  
Rejection Sampling ◽  
Mcmc Method ◽  
Empirical Comparison ◽  
Sampling Schemes ◽  
Probability Densities ◽  
Better Than

Simulating random variates from arbitrary non-normalized probability densities, very often they do not have familiar forms, is an increasingly important requirement in many different fields, especially in Bayesian statistics. Accept-reject algorithm is one of the commonly used methods to simulate random variates from such densities but restriction on choosing proposal density under this framework (heavier tails than the target density) limits its applicability to a larger extent. On the other hand, Markov Chain Monte Carlo (MCMC) method can choose proposal density arbitrary which makes this method applicable to a larger class of target densities5. In addition to MCMC method, a more general widely used method known as ratio-of-uniforms (RoU) which requires only two uniform variates to simulate one variates from such densities. However, no empirical comparison among these methods for simulating random variates from such densities was seen in the literature. In this paper, we limit our study only to MCMC and RoU methods to simulate random variates from such densities. Following the generation of random variates from such densities using these two methods, we compare the performance of these two methods based on quality of the generated samples. Finally, we conclude that RoU method performs better than MCMC method as far as quality of the generated sample (randomness) and computational cost are concerned. Dhaka Univ. J. Sci. 68(1): 59-64, 2020 (January)

scholarly journals Storing `Galia' Melons in a Controlled Atmosphere with Ethylene Absorbent

HortScience ◽  
1993 ◽  
Vol 28 (7) ◽  
pp. 725-726 ◽  
Author(s):  
Yair Aharoni ◽  
Azica Copel ◽  
Elazar Fallik
Keyword(s):  
Cucumis Melo ◽  
The Other ◽  
Controlled Atmosphere ◽  
Control Fruit ◽  
Better Than

The quality of `Galia' melons (Cucumis melo pv. reticulates) stored in a controlled atmosphere (CA) of 10% CO2 plus 10% O2 with ethylene absorbent (EA) for 14 days at 6C and an additional 6 days at 20C was significantly better than that of control fruit or fruit stored in CA only. Fruit stored in CA plus EA were firmer and exhibited less decay than fruit from the other two treatments.

scholarly journals Determination of Effectiveness Absorption of The Rice Husk And Hazelnut Shell to Purification Used Cooking Oil

2019 ◽  
Vol 12 (1) ◽  
pp. 19
Author(s):  
Loth Botahala ◽  
Yanti Malailak ◽  
Herlin Silvia Maure ◽  
Hagar Karlani
Keyword(s):  
Rice Husk ◽  
Activated Charcoal ◽  
Absorption Capacity ◽  
Cooking Oil ◽  
Used Cooking Oil ◽  
Hazelnut Shell ◽  
Hazelnut Shells ◽  
Better Than

The effectiveness of the absorption of activated rice husk and hazelnut shells on the purification of used cooking oil has been carried out. The aim is to determine the absorption capacity of the active charcoal of rice husk and hazelnut shells to purify used cooking oil. After being physically activated, activated charcoal from rice husk and pecan shells is applied to the purification of used cooking oil. The results show that the quality of hazelnut shell charcoal is better than rice husk after it is applied to purifying used cooking oil.

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