国产丁戊橡胶与顺丁橡胶的加工应用性能对比研究

通过与BR的对比,研究了国产丁戊橡胶(BIR)的加工性能、硫化特性、物理性能,并探讨了BIR与BR在胎面胶中的加工应用性能差异。结果表明,BIR硫化速度快,门尼粘度低,加工性能好;BIR硫化胶撕裂强度高,压缩温升低,耐疲劳性好。NR/SBR/BIR并用体系胎面胶硫化速度快,加工性能好;硫化胶的撕裂强度、耐疲劳、抗湿滑等性能均优于NR/SBR/BR并用体系。     

Dynamic oscillatory shear properties of potentially melt processable high acrylonitrile terpolymers

Polyacrylonitrile (PAN) terpolymers consisting of acrylonitrile/methyl acrylate (AN/MA) systems with added amounts of a termonomer (acid based) were synthesized in an effort to generate melt spinnable carbon fiber precursors. The complex viscosity was measured as a function of time in the temperature range of 200-220 °C, and was found to be dependent on both, the amount, as well as the nature of the termonomer. For the different acid termonomers studied, the cyclization/crosslinking reactions occurring during stabilization as evidenced by the increase in viscosity over time of the PAN system ranged in the order, itaconic acid>acrylamide>methyl acrylic acid>acrylic acid (IA>AM>MAA>AA). Dynamic shear experiments indicated that an AN/MA system containing 3 mol% IA seemed well suited for melt spinning and stabilization. A chemorheological correlation was used to describe the viscosity variation in the PAN system as a function of IA content, temperature and time.     

用WB16改善合成橡胶的加工性能

本工作通过胶料的流动性、可塑性、硫化特性、力学性能和老化性能的测试,试验了加工助剂WB16对BR、SBR、CR、EPDM四种合成橡胶加工性能和力学性能的影响。结果表明,加入少量WB16即可明显地降低胶料的表观粘度,提高胶料流动性,而对胶料的力学性能和热老化性能无明显的不利影响。是一种值得推广的新型橡胶加工助剂。     

高芳烃油填充镍系顺丁橡胶的性能

采用干法充油工艺制得了１０种油品的充油镍系顺丁橡胶，试验结果表明，填充３７．５份安庆石油化工总厂１＾＃－４＾＃高芳烃油及济南炼油厂三线抽出油的充油胶，ＭＬ＾１００℃１＋４为４０－４４；硫化胶的拉伸强度、定伸应力、扯断伸长率和硬度等基本力学性能远达到镍系充油胶技术指标；高芳烃含量低的５＾＃－７＾＃油品充油胶门尼粘度和硫化胶强伸性能偏低；８＾＃，９＾＃油品因含有大量胶质，其充油胶表现出一些特殊，表明填     

溶聚丁苯橡胶SSBR2305的结构与性能

研究了锡偶联溶聚丁苯橡胶SSBR 2305的大分子结构、动态力学性能及加工性能。结果表明，SSBR 2305的结合苯乙烯质量分数为25.64%。丁二烯链段中顺式-1，4-结构质量分数为24.14%，反式-1，4-结构质量分数为39.64%，1，2-结构质量分数为36.21%，其玻璃化转变温度为-50.5℃，动态粘弹谱仪的测定结果显示了这种溶聚丁苯橡胶良好的高抗湿滑性和低滚动阻力，其加工性能可以保证生产过程的顺利进行。     

Effect of comonomers on melt processability of polyacrylonitrile

This work is concerned with the feasibility of achieving melt‐processable polyacrylonitrile copolymer systems as precursors for the manufacture of carbon fibers. Identification of suitable comonomers and achieving the optimum content of the comonomer were some of the main objectives of this investigation. It was seen that methyl acrylate (MA) was found to be suitable for enabling the melt processing of polyacrylonitrile (PAN), in terms of melt viscosity, time stability, and char yield. Below 10 mol % of MA, the PAN copolymer exhibited no flowability, even at very low molecular weights (～ 20,000). The long‐range order inherently present in PAN is speculated to be broken down at a critical value of about 10% MA at 220°C in the PAN‐based system, enabling its melt flowability. It was also seen that the incorporation of MA was seen to improve the temperature and molecular weight window of processability of the PAN system. The molecular weight cutoff for the 90/10 mol % acrylonitrile/methyl acrylate (AN/MA) system was about 50,000 at 220°C, whereas it was increased to about 100,000 in the presence of 15 mol % MA comonomer. Feasibility studies on the use of other comonomers such as higher acrylates and acrylamides were also conducted. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 85: 69–83, 2002     

不同共混比Ln—BR／NR的性能

研究了稀土顺丁橡胶（Ｌｎ－ＢＲ）与天然橡胶（ＮＲ）以不同比例共混后生胶、混炼胶和硫化胶的性能，并与相同条件下的镍系顺丁橡胶（Ｎｉ－ＢＲ）／ＮＲ共混胶的性能进行了对比，结果表明，共混胶随Ｌｎ－ＢＲ用量的增大，ＭＬ＾１００℃１＋４降低，工艺行为良好，硫化胶力学性能、磨耗、湿滑指数和生热值下降，并且Ｌｎ－ＢＲ／ＮＲ硫化胶的抗湿滑性和动态疲劳性均优于Ｎｉ－ＢＲ／ＮＲ硫化胶。     

Bifunctional silane (TESPD) effects on improved mechanical properties of silica containing nitrile‐butadiene rubber/poly(vinyl chloride) compound

Organo bifunctional silane (TESPD) is added into silica containing NBR/PVC blend and its effects are investigated with respect to the vulcanization property, the processability, and the physical property. The addition of the TESPD into silica filled NBR/PVC compound increases the degree of crosslinking by formation of a strong three‐dimensional network structure between silica surface and rubber matrix via coupling reaction, which results in improved mechanical properties. It also improves the processability of the compound compared to the Control compound. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012     

对日本在浸渍加工技术与设备方面创新的综述（上）

文章以2004年～2007年上半年发表的半固化片浸渍加工技术与设备的日本专利为研究对象,对此创新内容及思路加以综述。