Teknik Bard Untuk Pengitara Semula Pelbagai Sisa Getah.

The effect of palm oil fatty acid additive (POFA) on curing characteristics, mechanical and morphological properties of silica filled natural rubber (NR)/ recycle rubber powder (RRP) blends were studied. Results indicate that the presence of POFA is not only improved the cure rate of NR/RRP blends but also improved it's processability. Compared to control NR/RRP blends, the presence of POFA increased the mechanical properties such as tensile strength, tensile modulus and hardness of silica filled NR/RRP blends. The presence of POFA enhanced crosslink density and improved filler dispersion of silica filled NR/ RRP blends which consequently increases the silica-NR/RRP interaction

The level of quality management practices in childcare centers by using a Quality Improvements and Accreditation System (QIAS) Model

Background: The study was conducted in childcare centers that covered three states in the northern part of Malaysia. Thus, the Quality Improvements and Accreditation System (QIAS) instrument was used for this purpose.This is reflected in the seven (7) proportion quality areas in the QIAS, which are; staff relationships with children and peers; partnerships with families; programming and evaluation; children’s experiences and learning; protective care and safety; health, nutrition and well being; and managing to support quality. Objective: The objective of this paper is to disseminate findings and share best practices of early childcare operators, providers, principals, and teachers that handled children from birth to 6 years.It aimed to identify the level of quality management practices in childcare centers in Malaysia. Results: Data collected through the questionnaire depict a slightly different picture where the childcare providers and teachers reported that their practices were moderate in terms of staff relationships with children and peers, partnerships with families, programming and evaluation, children’s experiences and learning, and managing to support quality except protective care and safety which was high. Conclusion: This QIAS instrument is able to serve as a guidelines to the childcare center on what is needed and required to be look into and take into consideration in order to ensure the quality of childcare centers

The Radicalism Prevention Policy in State Islamic Religious Universities in South Sulawesi: An Overview of Maqasid Syari'ah

 This study aims to raise the perspective of Islamic law on the policy of preventing radicalism at PTKIN in South Sulawesi, which is by dharuriyyat al-khamsah in maqasid shari'ah. This research is qualitative research with a maqasid sharia approach with data collection methods obtained through documentation and interviews. The results of this study found that; First, The stipulation of the Chancellor's Decree regarding the ethics committee and appointing several lecturers from the leadership element, as well as the involvement of senior lecturers providing an understanding of peace and Islam as a religion of rahmatan lilalamin, then supervising academic activities, having strict, active, and consistent duties in carrying out ethics committee sessions, considered capable of preventing radically oriented behaviour. Second, build the image of the campus as a centre for Islamic studies and Bugis culture. Third, to provide room for discussion, both through seminars and face-to-face, especially with students exposed to radicalism. Fourth, make a study of Religious Deradicalization, which aims to prevent radicalism and strengthen religious moderation. When viewed from the perspective of maqaṣhid shari'ah, some of these efforts in preventing radicalism in several PTKIN in South Sulawesi are very important to determine as the main factor in efforts to deradicalize religion and also religious moderation. As relevant to the values of maqaṣhid shari'ah, which uses some of its features, namely universality, the interplay of hierarchies, and openness (freedom of the academic pulpit)

Incorporation of kenaf core fibers into low density polyethylene/thermoplastic sago starch blends exposed to natural weathering

The landfill disposal of a high volume of plastics that take a long time to decompose has led to a tremendous environmental problem. Incorporation of natural polymers and fibers into synthetic polymers accelerates the degradation rate by exposure to atmospheric agents such as sunlight, temperature and rainfall. In this work, thermoplastic sago starch (TPSS) and kenaf core fibers (KCF) from agricultural feed stocks were blended with low density polyethylene (LDPE) for natural weathering studies. The melt-mixed and compressed composite sheets had fiber loadings ranging from 0 to 40 wt.%, and were exposed to natural weathering conditions for a period of 3 and 6 months. The deterioration in mechanical, thermal, morphological and weight properties were investigated

Rheological Properties of Polystyrene/Polypropylene (PS/PP) Blends: The Effects of Various Compatibilizers

Studies on rheological properties of polystyrene/polypropylene (PS/PP) blends with and without the addition of various compatibilizers were carried out. PS/PP blends of 20/80, 50/50 and 80/20 (wt%) were prepared through melt blending in a single screw extruder at a screw speed of 40 rpm and temperature of 200 oC. The rheologycal properties were evaluated by melt flow indexer machine with the temperature of 200 oC. Four types of compatibilizers viz. polystyrene-block-poly (ethylene-butylene)-block-polystyrene (SEBS), surlyn, ethylene vinyl acetate (EVA) and sodium salt hydrate of 4 styrenesulfonic acid (ssh-4-ssh) were used in this study. The concentration of the compatibilizer is 7.5wt%.Results show for uncompatibilized blend, all blend compositions exhibit a reduction in melt viscosity, but the incorporation of EVA, surlyn and SEBS produced more resistance system to flow and increased the melt viscosity. However, in the presence of ssh-4-ssa a reduction in melt viscosity was observed, indicating easier for blend to flow

Influence of halloysite nanotubes hybridized with kenaf core fibers on the physical and mechanical properties of low density polyethylene/thermoplastic sago starch blends

In this work, halloysite nanotubes (HNTs) were hybridized with kenaf core fibers (KCF) to reinforce low density polyethylene (LDPE)/ thermoplastic sago starch (TPSS) blends. The effects of HNT loading (3–15wt.%) on the mechanical and physical properties were examined. The results showed an enhancement in tensile strength and modulus with the inclusion of HNTs. Formation of FTIR bands that are assigned to Al-OH and Si-O vibrations indicated the presence of HNTs in the system. Moreover, the thermal stability of hybrid compo- sites was improved with the addition of HNTs. Water uptake decreased as higher amount of HNTs imparted to the hybrid composites

Parametric modelling of Malaysian teeth template using computer aided design

This study explored a new method and process of design denture using CAD technology to develop a template of a complete denture. Computer aided design were used as a tool of the design process. Occlusion curve was set up as variable as to follow patient size. The maxilla and mandible teeth arrangement were treated as a template of Malaysian user. The accuracy of design is the main aspect of concern that match the patients' data so that the outcome product would be suitable with maximum comfort for the patient. The product of design template will be matched with the conventional method to compare the tolerance between both. The new design template helps to reduce the time consumption of conventional carving method. The final output of 3D geometry teeth templates design will represent the patient details

Potential Use of Paddy Straw as Filler in Poly Lactic Acid/Paddy Straw Powder Biocomposite: Thermal and Thermal Properties

AbstractPaddy Straw Powder (PSP) show potential as a new reinforcement based-natural fibre. A Haake internal mixer was used to incorporated paddy straw powder (PSP) into polylactic acid (PLA). Polylactic acid (PLA)/paddy straw powder biocomposite was prepared using constant rotor speed (60rpm) for 14minutes at 180∘C. The effects of paddy straw powder content (5-20wt %) on mechanical and thermal properties of the biocomposites were investigated. The tensile strength of the biocomposites was above 30MPa up to 15wt.% of PSP whereas the elongation at break was ranged between 2-3% with the incorporation of PSP up to 15wt.%. Modulus elasticity was increased by increasing the paddy straw powder content. Differential scanning calorimetry (DSC) results have demonstrated a minor effect of the rice straw on thermal behavior of PLA resin Thermogravimetry, analysis (TGA) demonstrated that thermal stability of PLA/PSP biocomposites is reduced by the incorporation of PSP

Solubility, Miscibility and Processability of Thermosetting Monomers as Reactive Plasticizers of Polyetherimide

AbstractA relatively new way to improve processability of thermoplastics is via the use of crosslinkable monomers which can act as reactive plasticizers and reduce the viscosity in the early stage of processing and then polymerize and phase separate during the final stage of processing thus recovering the original thermoplastics properties. This preliminary research aims to study the applicability of a range of allylic and epoxy monomers as reactive plasticizers of polyetherimide (PEI) in terms of solubility and processability of the monomers. Solubility parameters were calculated based on group additivity approach showed that only triallyl isocyanurate (TAIC) should be miscible with PEI. However, Tg of various concentrations of PEI/TAIC blends indicated immiscibility of the system in the presence of 10wt% PEI while miscibility of the components improve with increasing PEI content. The lower Tgs of the PEI/TAIC blends compared with pure PEI suggested the improvement in processability of PEI with the presence of TAIC