Natural rubber

This paper reports on the extraction of microcrystal cellulose from cotton fiber and their application as a reinforcing agent in NR matrix. Microcrystalline cellulose was also grafted with maleic anhydride (MA) so that grafted one can improve interfacial interaction between cellulose and natural rubber. Fillers were incorporated to block natural rubber by two-roll mill dry mixing.

8p dianmotminh02 03-05-2024 3 1   Download

The article will be focused on methods of chemical modification of NR and the use of improved traditional fillers such as carbon black (CB) and silica. Modification reactions include epoxidation, hydrogenation, and grafting vinyl monomers onto NR molecules. Some methods of surface modification of NR film were also reviewed. Thanks to modification the NR degree of unsaturatiton is decrease that leads to its enhanced aging resistance.

15p dianmotminh02 03-05-2024 8 2   Download

Preparation and characterization of natural rubber grafted with methyl methacrylate (MMA) and vinytriethoxysilane (VTES) were performed in the present work. Graft copolymerization of methyl methacryate was carried out in latex stage, and VTES was added during the graft copolymerization of MMA.

6p viporsche 25-10-2022 13 4   Download

This study concluded that natural rubber was a more climatically suitable crop for Nakhon Si Thammarat province, if only the four stated climatic variables were considered.

9p guernsey 28-12-2021 16 0   Download

Objectives of the thesis: The objective of this study is to develop an energy and nutrients recovering wastewater treatment process combining physicochemical and biological methods for NRP wastewater.

26p extraenglish 24-05-2021 24 3   Download

The objective of the research is to evaluate combination ability of nano additive with carbon black reinforced for rubber and rubber blend; create rubber nanocomposite materials with a high quality, solvent durability and sustainability in the naturally humid environment.

27p capheviahe27 23-02-2021 27 3   Download

The objective of this study is to develop an energy and nutrients recovering wastewater treatment process combining physicochemical and biological methods for NRP wastewater.

26p kequaidan7 01-09-2020 15 4   Download

The blends based on polyvinyl chloride (PVC), nitrile-butadiene rubber (NBR), natural rubber (NR) and polyethylene (PE) were made by three different methods. The mechanical properties of these blends in dependence of mixing time and temperature were characterized. The result showed that the two-step blending method, where PVC and NBR were first mixed together and then blended with NR and PE, is the best one to prepare blends with high mechanical properties.

6p 12120609 01-06-2020 16 0   Download

This paper presents some results on the survey of the impact of silica and black carbide on the mechanical – physical properties and vibration resistance of the rubber blended on natural rubber (NR) and synthetic styrene butadiene rubber (SBR), for application in manufacturing diesel engine mounts.

7p abcxyz123_02 03-03-2020 16 1   Download

Trong nghiên cứu này, các tác giả đã xây dựng đơn pha chế cao su dựa trên các loại cao su thiên nhiên và cao su tổng hợp 1,3 butadiene và nitrile (NBR 35L) với chất độn là hạt nano silica hoặc titan dioxide nhằm sản suất các sản phẩm nút cao su sử dụng trong các phản ứng tổng hợp hữu cơ.

11p bautroibinhyen16 09-02-2017 239 16   Download

The study on the relationship between compositions and mechanical properties of the blends based on poly(vinyl chloride) (PVC), butadiene-acrylonitrile rubber (NBR) and natural rubber (NR) has been carried out. The result shows that in the presence of NBR, which plays role of transition phase between the two incompatible polymers PVC and NR, the tertiary phase polymer blends having high tensile strength and elongation at break were obtained.

4p uocvong04 24-09-2015 75 8   Download

The structures of the newly synthesised macro azo initiators based on hydroxyl-terminated liquid natural rubber (HTNR) i.e, poly-(cis-1,4-isoprene) azobis-cyanopentanoate, was investigated by FTIR, UV-vis and elemental analyses. The thermal decomposition of the samples was carried out in toluene at 80o C showing that all they exhibited first-order kinetics and good initiating effectiveness as compared to that of AIBN.

6p uocvong03 24-09-2015 88 4   Download

The HN-06 compound was found as compatibilizer for natural rubber (NR)-chloroprene rubber (CR) blend. The blend containing 0.8 wt% HN-06 compound gave good compatibility and it can be observed by scanning electron microscopy (SEM) image of two rubbers layer’s interface. Blend of NR/CR/HN-06 = 70/30/0.8 wt% have high mechanical properties the tensile strength 25.1 MPa, the tear strength 43.1 N/mm, the abrasion loss 0.044 g, good ozone and oil resistance.

5p uocvong02 24-09-2015 68 7   Download

Vietnam belongs to the region of tropical climate with high temperature and moisture, especially very high violete radiation exposure. Under these conditions the properties of elastomeric alloys made from waste rubber powder and polypropylene using peroxide as an initiator were messured. Using the dynamic stabilizing method the influence of the composition and the nature of the components on the alloy stability was estimated.

4p uocvong02 24-09-2015 39 2   Download

Thanks to the structure properties, liquid natural rubber (LNR) was used by several authors as compatibilizer for polymer blends based on the natural rubber. This paper gave an overview about the influence of the compatibilizer TH1 – LNR with the end OH-groups on the morphology and properties of the research blend systems. The research results showed that TH1 with the molecular weight of 8.500 had the best compatible effect for the blends NR/PE, NR/SBR and NR/NBR. This compatibilizer TH1 was good for the blends the components of which had the little polarity difference like NR/SBR.

6p uocvong01 24-09-2015 65 4   Download

Natural rubber fromHevea brasiliensisis a high molecular mass polymer of isoprene units withcis-configuration. The enzyme responsible for the cis-1,4-polymerization of iso-prene units has been identified as a particle-bound rubber transferase, but no gene encoding this enzyme has been cloned from rubber-producing plants. By using sequence information from the conserved regions of cis-prenyl chain elongating enzymes that were cloned recently, we have iso-lated and characterized cDNAs from H.

10p fptmusic 12-04-2013 42 2   Download

Tuyển tập các báo cáo nghiên cứu khoa học trên tạp chí khoa học vật lý quốc tế đề tài: Comparison of the Effects of Organoclay Loading on the Curing and Mechanical Properties of Organoclay-Filled Epoxidised Natural Rubber Nanocomposites and Organoclay-Filled Natural Rubber Nanocomposites

23p hoami_266 15-09-2011 52 7   Download

Tuyển tập các báo cáo nghiên cứu khoa học trên tạp chí khoa học vật lý quốc tế đề tài: Effect of Blowing Agent Concentration on Cell Morphology and Impact Properties of Natural Rubber Foam

13p hoami_266 15-09-2011 61 6   Download