Reflections on the Past and Future of Polyether Elastomers and on Redox Emulsion Polymerization

1991 ◽  
Vol 64 (3) ◽  
pp. 56-64 ◽  
Author(s):  
E. J. Vandenberg
Keyword(s):  
Emulsion Polymerization ◽  
American Chemical Society ◽  
Chemical Society ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Polymer Science ◽  
The Past ◽  
Synthetic Rubber ◽  
Styrene Butadiene ◽  
To Receive

Abstract I am greatly honored to have been selected to receive the prestigious Charles Goodyear Medal of the Rubber Division of the American Chemical Society. My work in the rubber field falls into two general areas: (1) early discoveries on the redox emulsion polymerization of styrene-butadiene rubber (SBR) and (2) polyether elastomers. I am perhaps best known for my work on polyether elastomers since I discovered, patented, and helped develop several families of polyether elastomers which were commercialized and are still important speciality elastomers. Most of my talk will be in that area. However, my SBR studies included my first important polymer-science discovery and preceded those who independently discovered the same systems and who were able to develop them commercially to the considerable advantage of our largest volume synthetic rubber, SBR. After briefly reviewing these past areas, I will give you my reflections on what important future developments for the rubber field could arise in the polyether area.

scholarly journals Mechanical and morphology characteristics of natural rubber-styrene butadiene rubber (NR-SBR) blends in the presence of natural microbentonite

2021 ◽  
Vol 912 (1) ◽  
pp. 012072
Author(s):  
B Wirjosentono ◽  
A H Siregar ◽  
D A Nasution
Keyword(s):  
Natural Rubber ◽  
Rubber Tree ◽  
Weight Ratio ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Mineral Oils ◽  
Synthetic Rubber ◽  
Styrene Butadiene ◽  
Morphology Characteristics ◽  
Xylene Solution

Abstract Natural rubber (NR) has been the world renewable natural elastomer produced mainly in South East Asia from the sap of rubber tree (hevea brasiliensis). However it only exported to manufacturing countries for production of various engineering and specialty rubber products. Blending of the natural rubber with synthetic rubber such as styrene butadiene rubber (SBR) is a mean to improve engineering specification of the NR, especially due to exposure of mineral oils during its service life. Whereas natural microbentonite functions not only as filler but also as coagulant breaker in both SIR-10 and SBR matrices, which improves miscibility of the blends. In this work blending of Indonesian natural rubber (NR: SIR-10) with styrene butadiene rubber (SBR) were carried out in reflux reactor in xylene solution in the presence of various loading of natural microbentonite as fillers. Miscibility of the blends were measured from their mechanical properties as well as morphology of their fracture surfaces using electron microscopy (SEM). It was found that optimum loading of microbentonite in the NR/SBR (weight ratio: 50/50) blend was 3 per hundred rubber (phr), which showed good adhesion of the rubber matrices onto the filler surface and without any agglomeration.

Effect of Epoxidized Palm Oil (EPO) on Tensile Properties and Density of Rubber Compounding

2013 ◽  
Vol 812 ◽  
pp. 216-220 ◽  
Author(s):  
Mohd Nasir Anis Nazurah ◽  
Ahmad Zafir Romli ◽  
M.A. Wahab ◽  
Mohd Hanafiah Abidin
Keyword(s):  
Tensile Strength ◽  
Palm Oil ◽  
Abrasion Resistance ◽  
Renewable Resource ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Elongation At Break ◽  
Synthetic Rubber ◽  
Epoxidized Palm Oil ◽  
Styrene Butadiene

Epoxidized palm oil (EPO) can act as processing oil has the potential of non toxic, degradable, renewable resource and as the alternative safe process oils in rubber compounding. Epoxidized palm oil is used as some of additives in rubber compounding to provide function of softener or stabiliser thus, improve properties of rubber compounding performance. Rubber that is used in this study is styrene butadiene rubber (SBR); a synthetic rubber copolymer consisting of styrene and butadiene. SBR also has good abrasion resistance and good aging stability when protected by additives. Compared to natural rubber, SBR has better processability, heat aging and abrasion resistance but inferior elongation, hot tear strength, hysteresis, resilience and tensile strength. This study is focusing on the effect of EPO without the addition of carbon black into the compound via tensile and density test. This is very important as to study the physical and mechanical interaction between SBR and EPO without the influence of other fillers. Different loading of oil were used at 25 pphr, 30 pphr. 35 pphr, 40 pphr and 45 pphr in the compounding process as processing aid. EPO35 which contain 35 pphr of EPO shows the highest value of tensile strength which is 2.2 MPa. The vulcanizate that contain 30 pphr of EPO shows the highest value for Youngs modulus which is 0.22 MPa while the elongation at break increased as the oil loading increased. The highest value for density is 0.979 g/cm3 for the vulcanizate contain 25 pphr of EPO. The results indicates that EPO is potential to replace other processing oils as renewable resource and safe to human.

Engineering with Rubber

1986 ◽  
Vol 59 (3) ◽  
pp. 69-83 ◽  
Author(s):  
Leonard Mullins
Keyword(s):  
Science And Technology ◽  
American Chemical Society ◽  
Chemical Society ◽  
Scientific Basis ◽  
Research Association ◽  
Polymer Science ◽  
Special Interests ◽  
Good Fortune ◽  
Short Time ◽  
To Receive

Abstract First I must thank you Mr. Chairman for your most generous introduction. I understand that there will be another opportunity later today to thank the Executive Committee of the Rubber Division of the American Chemical Society for nominating me as the Charles Goodyear Medalist for 1986, for the pleasure of being here today, and for the privilege of addressing you. But I would wish to say, at this stage, how deeply honored I am to receive this most distinguished award. It is a tradition that this address should reflect the author's special interests and his own contribution to rubber science and technology, and they have tended to be autobiographical in nature. However the title which I have chosen, “Engineering with Rubber,” covers a broad field of activity, but in the relatively short time at my disposal I will perforce have to restrict myself to those areas in which I have been personally involved. Like so many recent Charles Goodyear Medalists it was my good fortune to be active during the period of almost explosive growth of polymer science and technology which occurred during the 1940's and 1950's and which provided a proper scientific basis for the polymer industries created during this period. The rubber industry is, of course, much older, but hitherto it had relied upon an essentially empirical approach to provide practical answers to most of its problems. It was also my good fortune to work with and alongside many outstanding individuals both at the Research Association of British Rubber Manufacturers (now the Rubber and Plastics Research Association) and at the Malaysian Rubber Producers' Research Association (formerly the British Rubber Producers' Research Association). To these I owe much and I would wish to share this recognition with my colleagues.

Effect of Epoxidized Palm Oils Loading on the Crosslink Density and Rebound Resilience Characteristic of SBR Vulcanizates

2013 ◽  
Vol 748 ◽  
pp. 206-210
Author(s):  
Mohd Zaki Nurul Ayunie ◽  
A.Z. Romli ◽  
M.A. Wahab ◽  
M.H. Abidin
Keyword(s):  
Carbon Black ◽  
Crosslink Density ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Swelling Behaviour ◽  
The Past ◽  
Natural Oils ◽  
Sunflower Oils ◽  
Styrene Butadiene ◽  
Processing Aids

The study about natural oils as processing aids in rubber was reported by several researchers for the past few years. The natural oils like rice bran oils, soybean oils, sunflower oils, vegetables oils and palm oils can be used as processing oils in rubber compounding [1-3]. These natural oils have been reported to have certain advantages compared to the petroleum based processing oils. In this study the potential of epoxidized palm oils (EPO) as additive and processing oils in carbon black filled styrene butadiene rubber was investigated. The main ingredients used were butadiene rubber (SBR), epoxidized palm oil (EPO) and carbon black. The vulcanized SBR rubber is then undergo several testing like swelling test, hardness and rebound resilience. An attempt was made to see whether the amount of EPO added to the SBR vulcanizates will affect the rebound resilience and swelling behaviour of the SBR vulcanizates. From this study, it was found that the compound contained higher EPO content tend to have lower rebound resilience, similar trend can be observed for hardness properties. While the crosslink density of the vulcanizates is decrease as the EPO content increases.

Fun and Frustrations with Synthetic Rubber

1977 ◽  
Vol 50 (3) ◽  
pp. 67-77
Author(s):  
James D. D'Ianni
Keyword(s):  
World War Ii ◽  
Natural Rubber ◽  
Korean War ◽  
American Chemical Society ◽  
Chemical Society ◽  
World War ◽  
Great Pleasure ◽  
The Past ◽  
Synthetic Rubber ◽  
The Korean War

Abstract It is a great pleasure and honor to have this opportunity to share with you some of my experiences in synthetic rubber over the past forty years. I am deeply appreciative of my selection as the thirty-fourth recipient of the Charles Goodyear Medal by the Rubber Division of the American Chemical Society and accept it only as a representative of my many associates at Goodyear who have participated with me in significant developments in synthetic rubber during this period. As the title of this talk indicates, we had both successes and disappointments in our endeavors to develop improved synthetic rubbers. These efforts were greatly stimulated by shortages of natural rubber which occurred in times of national emergencies such as World War II and the Korean War. When we successfully met these challenges it was fun, but to the extent that we were not able to achieve all of our objectives, we suffered a number of frustrations.

Sign in / Sign up

Export Citation Format

Share Document