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首页> 外文期刊>Polymer Testing >Characterization of styrene butadiene rubber/recycled acrylonitrile-butadiene rubber (SBR/NBRr) blends: The effects of epoxidized natural rubber (ENR-50) as a compatibilizer
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Characterization of styrene butadiene rubber/recycled acrylonitrile-butadiene rubber (SBR/NBRr) blends: The effects of epoxidized natural rubber (ENR-50) as a compatibilizer

机译：丁苯橡胶/再生丙烯腈-丁二烯橡胶（SBR / NBRr）共混物的表征：环氧化天然橡胶（ENR-50）作为增容剂的作用

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摘要

The effects of epoxidized natural rubber (ENR-50) as a compatibilizer on the properties of styrene butadiene rubber/recycled acrylonitrile-butadiene rubber (SBR/NBRr) blends were studied. Styrene butadiene rubber/recycled acrylonitrile-butadiene rubber (SBR/NBRr) blends were prepared by two-roll mill with five different compositions (i.e.,85/5/10, 75/ 15/10, 65/25/10, 55/35/10 and 40/50/10), with the ENR-50 content fixed at 10 phr. Cure characteristics, mechanical properties, FTIR analysis, differential scanning calorimetry (DSC) and morphology (SEM) studies were performed to determine the compatibility of SBR/NBRr blends in the presence of ENR-50. The cure characteristics showed that SBR/ NBRr blends with the presence of ENR-50 have lower scorch time t2 and cure time t90 than SBR/NBRr blends without ENR-50. The SBR/NBRr blends with ENR-50 exhibited lower minimum torque (ML) compared with SBR/NBRr blends without ENR-50, which indicates better processability of the blends after compatibilization. However, SBR/NBRr blends with ENR-50 exhibited a higher value of maximum torque (MH) than SBR/NBRr blends without ENR-50. The incorporation of ENR-50 improved the tensile strength and tensile modulus (M100, stress at 100% elongation) of SBR/NBRr blends with ENR-50 compared with SBR/ NBRr blends without ENR-50 at all blend ratios. Nevertheless, the addition f ENR-50 reduced the elongation at break (Eb) and rebound resilience of compatibilized SBR/NBRr blends compared with SBR/NBRr without ENR-50. The improvement in hardness upon compatibilization is due to an increase in crosslink density. FTIR analysis showed that ENR-50 is compatible with NBRr through the oxirane group and with SBR through the isoprene group. Differential scanning calorimetry results show an improvement in the compatibility of SBR/NBRr blends with the presence of ENR-50. Scanning electron microscopy (SEM) of the fracture surfaces indicates that, with the addition of ENR-50 in SBR/NBRr blends, better adhesion between SBR and NBRr was obtained, thus improving the ompatibility of SBR/NBRr blends.
机译：研究了环氧化天然橡胶（ENR-50）作为增容剂对丁苯橡胶/再生丙烯腈-丁二烯橡胶（SBR / NBRr）共混物性能的影响。苯乙烯丁二烯橡胶/再生丙烯腈-丁二烯橡胶（SBR / NBRr）的共混物是通过两辊磨制备的，具有五种不同的成分（即85/5 / 10、75 / 15 / 10、65 / 25 / 10、55 / 35 / 10和40/50/10），而ENR-50的含量固定为10 phr。进行固化特性，力学性能，FTIR分析，差示扫描量热法（DSC）和形态学（SEM）研究，以确定在ENR-50存在下SBR / NBRr共混物的相容性。固化特性表明，与不含ENR-50的SBR / NBRr混合物相比，存在ENR-50的SBR / NBRr混合物具有较低的焦烧时间t2和固化时间t90。与不含ENR-50的SBR / NBRr混合物相比，具有ENR-50的SBR / NBRr混合物具有较低的最小扭矩（ML），这表明相容后混合物的加工性能更好。但是，与不含ENR-50的SBR / NBRr混合物相比，与ENR-50的SBR / NBRr混合物表现出更高的最大扭矩（MH）值。与没有ENR-50的SBR / NBRr混合物相比，ENR-50的加入改善了所有ENBR-50的SBR / NBRr混合物的拉伸强度和拉伸模量（M100，100％伸长率下的应力）。尽管如此，与没有ENR-50的SBR / NBRr相比，添加ENR-50会降低相容的SBR / NBRr混合物的断裂伸长率（Eb）和回弹力。相容性时硬度的提高归因于交联密度的增加。 FTIR分析表明，ENR-50通过环氧乙烷基团与NBRr相容，并通过异戊二烯基团与SBR相容。差示扫描量热法结果表明，在存在ENR-50的情况下，SBR / NBRr共混物的相容性得到了改善。断裂表面的扫描电子显微镜（SEM）表明，在SBR / NBRr共混物中添加ENR-50，可以获得更好的SBR和NBRr之间的附着力，从而改善了SBR / NBRr共混物的相容性。

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