UGG Schuhe New tread rubber - Integrated rubber SI

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New tread rubber - Integrated rubber SIBR

Be a random type of SIBR. But when the polymerization temperature is too high, energy consumption, the reaction difficult to control and easy to produce gels. Lead to physical decline. Polymerization system and thus need to add the right amount of polar modifier to control the SIBR the random distribution. Halasa, etc. add to the polymerization system tetramethylethylenediamine (TMEDA), in 60 ~ 90 ℃ under the polymerization of random type SIBR. If the half-polymerization temperature at 30 ~ C below, when the regulator does not increase. By block type SIBR, but increases in polarity regulation of N-piperidine hydrogen phosphate (TPPO) or potassium tert-amyl oxygen (KOAm), or TP-PO/KOAm compound used. May be a random type SIBR. Monomers can also be added in two or 3 times. First of all,[link widoczny dla zalogowanych], so that part of Bd in the random regulator or a small amount of regulator in the presence of the polymerization, when the polymerization conversion rate reaches a certain post. Add the remaining single st, Ip, and the remaining Bd, later combined with regulation, polymerization to complete the final three-block structure can be SIBR. For example, Herrmann, etc. in the St / Ip / Bd conditions for the 15/15/70, 65 Bd are the first to gather, when the conversion rate of 90% ~ 92%, plus sI, Ip, and the remaining Bd, while adding 1 polarity regulator ethylene glycol dimethyl ether. SIBR from block type structure are: 1,2-PB chain accounted for a 13%, cis 1,4-a PB chain of a total 24%, trans 1,4-a PB chain for a 34%, 3,4 A PI chain accounted for 1O%, 1.4 of a PI segment accounted for 3%, PS chains accounted for l6%. (2) continuous polymerization reactor in series with multiple monomer into the first row by a certain ratio of reactor to achieve a certain conversion,[link widoczny dla zalogowanych], sent to the second reactor, followed by a series of polymerization reactor. The main features of the preparation can be added several times at different stages of monomer conversion, initiator and regulator, which can be synthesized molecules Shanghai Chemical Industry Survey 2001 16 chain structure is different,[link widoczny dla zalogowanych], broad molecular weight distribution, processing and good performance SIBR . It is more industrialized than the intermittent polymerization. SIBR synthesis techniques difficult. It is different from sf, Bd binary aggregation SSBR, SBS, K a line of lithium polymer resin material sets, slBR to st, I mouth, Bd ternary component anionic polymerization,[link widoczny dla zalogowanych], the copolymer molecular weight and repeat unit sequence length is can change. To adjust the system terpolymer composition, microstructure, molecular weight and sequence length difficult. Nevertheless, SIBR has caused people in the domestic synthetic rubber industry wide attention, and become producers of synthetic rubber research and development hot spots. Jilin Chemical Industrial Company is working with universities to develop a random-type ternary SIBR, made some progress. Research Institute of Beijing Yanshan Petrochemical Company developed the dual-use lithium initiator, synthesized a series of symmetric binary, ternary block type SIBR and stereoregular block type SIBR, and has developed patented technology. Beijing University of Chemical commitment issued by the Ministry of Chemical Industry on the star SIBR research work, their self-made multi-functional group of organic lithium initiator initiated polymerization of the polyfunctional organic lithium initiator has applied for patent (Patent No. 95l16675.5), the project have been identified through the ministerial level, technical indicators have reached international level, particularly in the O ~ C and 60 under the tan8 Tuen excellent value. 4 Recommendations (1) With the development of national economy, the automotive industry as a pillar industry of national economy. Especially the car industry will be rapid development of high-speed tires, safety, energy efficiency, comfort can be along with more stringent requirements. But the traditional method is using several tread material NR, BR, ESBR other mechanical blending and use,[link widoczny dla zalogowanych], this can only be a variety of plastic materials to achieve uniformity in the macro, micro is still apart, and the effect of curing vulcanizates performance so that all the performance advantages of the original compound are not fully realized. Directly synthesized by chemical methods of SIBR reach the chain-level mixing, contribute to the performance of joint play, which is better than mechanical blending of several rubber modification. So. SIBR in the production of high-performance tire is unique. (2) SIBR SSBR areas under the third generation, the Department of a new generation of improved products. SIBR help expand SSBR varieties developed grades. Adjust the product structure of the rational distribution of SSBR, increase SSBR market development and the depth and breadth of processing applications. Development SIBR can solve the problem C utilization. Therefore, using the rich resources, the development SIBR, production of high value-added new materials to form a patented technology. Industry as soon as possible. Has a very real sense.
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