Summary of Chemical doctoral thesis: Study on enhancement of technical characteristics for some composite rubbers with nano additive

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.
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Summary of Chemical doctoral thesis: Study on enhancement of technical characteristics for some composite rubbers with nano additive MINISTRY OF EDUCATION VIETNAM ACADEMY OF AND TRAINING SCIENCE AND TECHNOLOGY GRADUATE UNIVERSITY SCIENCE AND TECHNOLOGY --------------------------- PHAM CONG NGUYEN STUDY ON ENHANCEMENT OF TECHNICALCHARACTERISTICS FOR SOME COMPOSITE RUBBERS WITH NANO ADDITIVE Major: Organic chemistry Code: 9.44.01.14 SUMMARY OF CHEMICAL DOCTORAL THESIS Hanoi - 2019 The work was completed at: Academy of Science and Technology- Vietnamese Academy of Science and TechnologyScience instructor: Pro.Doc. Do Quang Khang Reviewer 1: … Reviewer 2: … Reviewer 3: ….The thesis will be protected before the doctoral dissertation thesis, meetingat the Academy of Science and Technology - Vietnam Academy ofScience and Technology at ... hour ... , date ... month ... 2018The thesis can be found at: - Library of the Academy of Science and Technology - National Library of Vietnam A: Overview of the thesis1. Problem statement Polymer nanocomposite material in general and rubber nanocompositein particular are particularly interested in research and development in thetime to come because they have many superior properties superiority. In rubber applications, reinforcement mostly used in orrder to createbetter quality products and reduce costs (active fillers). Traditionalreinforcement in the rubber industry such as black coal, silica, clay powder...These enforcements were predominantly micro-sized at lower costs, so theyare often referred to as fillers (active or inert fillers). Rubbers are reinforcedwith these materials are called composite rubbers. Different from rubber composite, rubber nanocomposite wasreinforced with nanometer-sized fillers (their size has one of threedimensions below 100nm), nanocomposite rubbers were created by differenttechniques, such as mixing in a melted state, mixing in solution, mixing inlatex state followed by method of coagulation and polymerisation aroundfiller particles. Compared to rubber reinforced with micro fillers, rubbberreinforced with nano fillers has better stiffness, modular, anti-ageing andairproof property. For each type of filler, besides advantages, there arealways disadvantages. Therefore, in order to promote advantages and limitdisadvantages of each type of filler, recently, some researches havecombined two type of fillers together [1,3] but not much. Realizing that theresearch direction of combining nano-additives with black coal reinforced forrubber materials is a new direction today, because the number of publishedworks is still small and it is unclear the influence when combining black coalwith nano clay, nanosilica and carbon nanotubes. Stemming from that reason,the thesis is aimed at: “Study on enhancement of technical characteristicsfor some composite rubbers with nano additive” as the subject of research.2. Objectives of research and its content The objective of the research is to evaluate combination ability of nanoadditive with carbon black reinforced for rubber and rubber blend.- Create rubber nanocomposite materials with a high quality, solventdurability and sustainability in the naturally humid environment.The content of the research:- Study on denaturing nanoclay, carbon nanotubes, nanosilica surface withdifferent agents,- Study on manufaturing and evaluating the property of rubbernanocomposite based on the blend of natural rubber (NR)/rubber butadienacrylonitril (NBR); natural rubber (NR)/Rubber clopren (CR) reinforced withnano additive,- Study on combining nano reinforced material with carbon black using infour type of substrates: natural rubber, blend natural rubber (NR)/rubber 1butadien acrylonitril (NBR); natural rubber (NR)/Rubber clopren (CR) andblend rubber butadiene acrylonitrile (NBR)/polyvinyl chlorite (PVC),- Study on combining nanosilica, nanoclay and carbon black materials witheach other in the substrate of blend rubber NR/CR.3. Contributions of research- Denatured, organized nanoclay with a mixture of surfactants (DTAB;BTAB; CTAB with molar ratio was 30:5:65). Obtained organic clay withproperties: 21,3% organic content; distance d100 = 1,86nm; swells in organicsolvent (axetone, xylene: 16; 23ml).- Optimal CB content for rubber blend NBR/PVC (70/30) was 40 pkl. At thiscontent, the materials had tensile strength increased by 47,1% compare tosample that had no containing CB. With higher CB content (50 pkl), carbonblack particles tend to agglomerate making the tight structure of the materialis broken, resulting in reduced material mechanical properties. ...