门尼黏度对丁苯橡胶1723拉伸性能及硫化特性的影响
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摘要
在结合苯乙烯和环保高芳烃油质量分数分别为23.6%和27.3%及24.0%和27.2%的情况下,研究了生胶门尼黏度对两种丁苯橡胶1723拉伸性能和硫化特性的影响。结果表明,随着生胶门尼黏度的增加,两种丁苯橡胶的定伸应力、拉伸强度、扯断伸长率及转矩均呈线性增大趋势,硫化时间延长。生胶门尼黏度每增加1个单位,两种丁苯橡胶的25,30,50 min的300%定伸应力分别增大约0.39 MPa和0.38 MPa、0.22 MPa、0.25 MPa和0.32 MPa,拉伸强度分别提高0.30 MPa和0.27 MPa,扯断伸长率分别增大2.8%和3.6%,最小和最大转矩分别增大0.047 dN·m和0.048 dN·m、0.137 dN·m和0.123 dN·m,硫化时间t_(25)、t_(50)及t_(90)分别延长0.11 min和0.13 min、0.10 min、0.15 min和0.19 min。
The effects of Mooney viscosity of styrene-butadiene rubber(SBR) 1723 on its tensile properties and curing characteristics were studied, with two series of SBR 1723 which one combination of bound styrene mass fraction were at 23.6%( by mass) and oil at 27.3%, and another′s combination of bound styrene mass fraction were at 24.0% and oil at 27.2%. The results showed that with the increasing Mooney viscosity, the modulus, tensile strength, elongation at break and torques of SBR 1723 were all increased linearly, and vulcanization time was prolonged. When Mooney viscosity was increased by 1 unit, the modulus at 25 min, 35 min and 50 min of SBR 1723 increased about 0.39 MPa and 0.38 MPa, 0.22 MPa, 0.25 MPa and 0.32 MPa respectively, the tensile strength increased about 0.30 MPa and 0.27 MPa, and elongation at break increased about 2.8% and 3.6%, the minimum and maximum torques increased about 0.047 dN·m and 0.048 dN·m, 0.137 dN·m and 0.123 dN·m,vulcanization time as t_(25), t_(50) and t_(90) were prolonged about 0.11 min and 0.13 min, 0.10 min, 0.15 min and 0.19 min respectively.
The effects of Mooney viscosity of styrene-butadiene rubber(SBR) 1723 on its tensile properties and curing characteristics were studied, with two series of SBR 1723 which one combination of bound styrene mass fraction were at 23.6%( by mass) and oil at 27.3%, and another′s combination of bound styrene mass fraction were at 24.0% and oil at 27.2%. The results showed that with the increasing Mooney viscosity, the modulus, tensile strength, elongation at break and torques of SBR 1723 were all increased linearly, and vulcanization time was prolonged. When Mooney viscosity was increased by 1 unit, the modulus at 25 min, 35 min and 50 min of SBR 1723 increased about 0.39 MPa and 0.38 MPa, 0.22 MPa, 0.25 MPa and 0.32 MPa respectively, the tensile strength increased about 0.30 MPa and 0.27 MPa, and elongation at break increased about 2.8% and 3.6%, the minimum and maximum torques increased about 0.047 dN·m and 0.048 dN·m, 0.137 dN·m and 0.123 dN·m,vulcanization time as t_(25), t_(50) and t_(90) were prolonged about 0.11 min and 0.13 min, 0.10 min, 0.15 min and 0.19 min respectively.
引文
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[2] 赵旭涛,刘大华.合成橡胶工业手册[M].北京:化学工业出版社,2011:356.
[3] 胡玮,芦齐,周文权.SBR-1500 E定伸应力影响因素分析[J].当代化工,2015,44(9):2257-2259.
[4] 张守汉,王丰乐,阚成友,等.丁苯橡胶1778的门尼黏度对拉伸性能的影响[J].合成橡胶工业,2018,41(6):407-409.
[5] 李晶,张守汉,应继成,等.结合苯乙烯质量分数对丁苯橡胶1778力学性能的影响[J].合成橡胶工业,2019,42(2):112-115.
[6] 侯军,郭睿达,段义良,等.丁苯橡胶结构与拉伸强度的关系研究[J].弹性体,2017,27(5):45-48.
[7] 赵志超,付含琦,胡玮.丁苯橡胶中结合苯乙烯含量对应用性能的影响[J].当代化工,2017,46(4):607-609.