Abstract White rice husk ash (WRHA) and silica filled ethylene–propylene–diene terpolymer (EPDM) vulcanizates were prepared using a laboratory size two‐roll mill. Curing characteristics physical properties of studied with respect to the filler loading type. Filler was varied from 0–50 parts per hundred resin (phr) at 10 phr intervals. carried out semi‐efficient vulcanization system in Monsanto rheometer. Enhancement curing rate observed increasing WRHA loading, whereas opposite trend for...

Abstract The performance of white rice husk ash (WRHA) as filler for polypropylene (PP)/ethylene‐propylene‐diene terpolymer (EPDM) thermoplastic elastomer (TPE) composites was investigated. with different loadings were prepared in a Brabender plasticorder internal mixer. Both unvulcanized and dynamically vulcanized prepared. Mixing vulcanization processes the monitored through typical torque‐time curves. mechanical properties morphology also studied. torque curves revealed that dynamic...

This paper compares the processability, mechanical properties, and water absorption behavior of polypropylene (PP) composites filled with white rice husk ash (WRHA) silica. It is shown that preparation WRHA requires less energy than silica composites. WRHA-PP exhibit better impact properties while other are in also showed a resistance to comparison An increase uptake filler loading was observed for both fillers although difference not significant The study further shows area specimen cut...

Mica waste, a type of commercial waste produced in bulk quantities by the mica mining industry, was processed and added to Natural Rubber Latex Foams (NRLF) made centrifuged creamed latex. Following Dunlop method, NRLF composites with various Processed Waste (PMW) loadings (0, 2, 4, 6, 8, 10 phr) were prepared, thermo-physical characteristics compared. Thermal conductivity, electrical resistivity against latex loading compared for first time. NRLFs prepared using exhibit 33 50 μm (width...

Abstract A comparative study on processed mica waste (PMW) filled natural rubber latex foams (NRLF) made out of centrifuged and creamed was conducted. The morphological, mechanical, degradability properties the composites were studied. PMW incorporated at 0, 2, 4, 6, 8, 10 phr loading. Morphological studies revealed that both types possess open‐cell structures. However, based foam showed structures with much larger cell sizes. loading similar influences composites, irrespective type used....

The effect of dynamic vulcanization and influence filler loading white rice husk ash filled elastomer rich ethylenepropylene diene terpolymer propylene blends were investigated. Blends with ranging from 0 to 60 php (Parts per hundred total polymer by weight) prepared in a Brabender plasticorder at 180°C rotor speed 50 rpm followed compression molding. torque was used investigate mixing progress. mechanical properties vulcanized blend systems compared those the unvulcanized counterparts. as...

Incorporation of finely powdered mica waste into natural rubber latex processed foam rubber, consuming a minimum amount energy could contribute to progress towards greener environment. In this study, generated in the mining industry was and incorporated creamed which is an alternative form concentrated manufactured using green process known as creaming process. Finely (PMW) added filler varying loading from 0 10 pphr at 2 intervals. The then converted vulcanized (NRLF). Effects on certain...

The water absorption behavior of white rice husk ash (WRHA) and silica filled ethylene-propylene-diene-terpolymer/polypropylene (EPDM/PP) ternary composites was studied with special reference to filler type, test specimen preparation (die cut or molded), dynamic vulcanization elastomer phase. uptake recorded as a function them over 40 days immersion period in distilled water. influence final on tensile properties the also studied. White molded exhibit lower when compared die composites,...

Rice husk, which is usually regarded as an agricultural waste, when burnt produces a silica rich ash known white rice husk (WRHA). This low cost and environmental friendly filler derived from renewable source has been incorporated into elastomer ethylene/propylene/diene terpolymer (EPDM)-polypropylene (PP) matrix to prepare thermoplastic composites, by melt mixing in Brabender plasticorder. Elastomer components of the composites were dynamically cured presence WRHA. Mechanical properties...

An attempt was made to replace conventional ZnO with nanoZnO in low ammonia, tetramethylthiuramdisulphide (TMTD)/Zinc oxide (ZnO) natural rubber latex preservative system (LATZ). Different percentages of TMTD and dispersions containing equal portions were prepared used preserve the latex. Centrifuged (CNRL) thus tested for VFA (volatile fatty acid) number MST (mechanical stability time) periodically over a period 75 days. Mechanical properties vulcanized thin films out CNRL preserved...

The possibility of replacing a part the 60 pph commonly used silica filler imported from Wellink Chemical Co., India in rubber composite for manufacture low speed castor wheel tread formulations was studied. curing characteristics and mechanical properties such as specific gravity, hardness, tensile strength, rebound resilience abrasion volume loss composites prepared with varying amounts White Rice Husk Ash (WRHA) ranging 15 to were determined. Results obtained compared those control...

Processability of thermoplastic natural rubber (TPNR) blends is a vital aspect in the preparation for industrial applications and assessed using different techniques. In this study, skim rubber/Polypropylene (SNR/PP) were prepared melt mixing their processability was examined terms torque development, long-term processability, moving die rheometer (MDR) torque, thermo-gravimetric analysis (TGA), flow index (MFI) morphological studies. A series unvulcanized (UV) dynamically vulcanized (DV)...

Kesan suhu pengekstrudan terhadap sifat–sifat reologi pemvulkanan dinamik bagi komposit getah dominan PP/EPDM/WRHA telah dikaji. Empat yang berbeza digunakan bermula daripada 170 sehingga 200°C dengan selang sebanyak 10°C. Adunan PP/EPDM tanpa pengisi juga turut dikaji tujuan perbandingan. Kajian menunjukkan bahawa boleh diproses secara termoplastik, jika ekstruder dan kadar ricih sesuai digunakan. lengkungan aliran rekahan leburan ekstrudat peningkatan meningkatkan kelikatan pada...

<p class="Default">Objective of this study was to investigate the effect different preservative systems used in concentrated latex manufacturing industry on physical properties crepe made out them. Unfractionated and unbleached (UFUB) rubber manufactured from latices preserved with ammonia, tetramethylthiuram disulphide, zinc oxide a 1:1 mixture disulphide (TMTD) (LATZ) were subjected examine their raw properties. It observed that UFUB either ammonia preserved, ZnO or chemically untreated...

In this research, a new process for preparation of liquid natural rubber (LNR) by means microwave irradiation heating was investigated. Natural (NR) obtained in the form crepe first subjected to mastication presence peptizing agent. Peptizing agent used pepton 4040 and its optimum concentration established as 3 phr. Micro wave carried out 10 minutes heat per-masticated NR incorporated with different loading micro absorber, Polyethylene glycol (PEG). According results, absorber 4 LNR prepared...

High percentage of non-rubbers in Skim Natural Rubber (SNR) has restricted its use manufacture advanced rubber products. SNR were melt blended with polypropylene (PP) at different blend ratios to generate thermoplastic elastomers (TPEs). Standard Lanka (SLR) and PP blends also prepared for the purpose comparison. Tensile, hysteresis, hardness, water absorption, dynamic mechanical properties unvulcanized (UV) dynamically vulcanized (DV) SNR/PP SLR/PP compared. Stress-strain behavior TPE...

ABSTRACTRaw mica powder may not show better physico-mechanical properties in rubber owing to its large particle sizes and low degree of surface activeness. Here, waste; a green filler was modified by partially exfoliating before incorporating it into natural (NR). The latex stage mixing conducted incorporate different loadings exfoliated waste (eWM). incorporation eWM had no significant effect on cure scorch time. reduction viscosities indicated processability the compounds. overall...

A study was carried out to understand the processing behaviour of smoked sheet rubber manufactured using natural field latex (NRFL) preserved ammonia at different concentrations. The NRFL with sodium sulphite used as a control together un-preserved NRFL. concentrations were kept for time intervals before further processing. Sheet according standard manufacturing procedures. Preservation ability, acid requirement coagulation, drying characteristics, and raw properties mechanical evaluated....

<p class="Default">Natural rubber (NR) latex sludge, a byproduct generated from centrifuged manufacturing industry, contains large portion of inorganic materials and presently treated as waste material. In this study, the sludge was converted to powdery material through drying grinding processes followed by surface modification with long chain fatty acid view improving its compatibility composites. class="Default"> class="Default">Composition structure analysis powder showed that it is...

The traditional long-term preservative system of latex has an impact on environmental air pollution by ammonia and leads to the production carcinogenic nitrosamine substances tetramethyl thiuram disulfide (TMTD). In this research, a novel with polysulfidic link were compounded tested as system, overcome drawbacks systems. Control samples prepared standard preservative. addition, chemical mixed also for investigating combined effect. After preservation treatment, stable nature field NR was...