The mechanical properties and phase morphologies of cis-1,4-butadiene rubber（BR） blended with polyethylene（PE） at different blend ratios were studied. The tensile test results show that the PE exhibits excellent r...The mechanical properties and phase morphologies of cis-1,4-butadiene rubber（BR） blended with polyethylene（PE） at different blend ratios were studied. The tensile test results show that the PE exhibits excellent reinforcing capabilities towards BR. Blending BR with PE results in a remarkable enhancement of tensile strength, modulus and the elongation at break simultaneously. An increment of tensile strength from 1.11 MPa to 16.26 MPa was achieved by incorporation of 40 wt% PE in the blends. The modulus and elongation at break of 40/60 PE/BR blends are also about 5 times higher than those of the pure BR treated under exactly the same conditions. The tear test indicates that the tear strength also increases with the increase of PE content. It reaches 58.38 MPa for the 40/60 PE/BR blend, which is approximately 10 times higher than that of the pure BR. Morphological study demonstrates that the PE forms elongated microdomains finely dispersed in the BR matrix when its content is over 30 wt%, which corresponds to the remarkably enhanced mechanical properties.According to the results, reinforcement mechanism of PE toward BR dependent on the microstructure has been discussed and two different mechanisms have been proposed.展开更多
以异戊二烯(Ip)为单体,Al(i-Bu)3(简称Al)/TiCi4(简称Ti)为催化剂(以100 g Ip计,Al、Ti的用量分别为2.27～3.77 mmol、4.08～6.81 mmol),芳香醚为活化剂,合成了异戊二烯橡胶(IR),考察合成钛系IR的影响因素,并将合成的钛系IR与日本Zeon...以异戊二烯(Ip)为单体,Al(i-Bu)3(简称Al)/TiCi4(简称Ti)为催化剂(以100 g Ip计,Al、Ti的用量分别为2.27～3.77 mmol、4.08～6.81 mmol),芳香醚为活化剂,合成了异戊二烯橡胶(IR),考察合成钛系IR的影响因素,并将合成的钛系IR与日本Zeon公司生产的钛系IR的性能进行对比。结果表明,采用Al/Ti/芳香醚体系,可合成出顺式-1,4-结构质量分数大于97.00%的IR,适宜的Al/Ti(摩尔比)为0.9～1.2;合成的钛系IR的顺式-1,4-结构含量和硫化胶的物理机械性能与Zeon公司生产的钛系IR相当。展开更多
基金financially supported by the National Natural Science Foundation of China(Nos.51221002 and 21174014)
文摘The mechanical properties and phase morphologies of cis-1,4-butadiene rubber（BR） blended with polyethylene（PE） at different blend ratios were studied. The tensile test results show that the PE exhibits excellent reinforcing capabilities towards BR. Blending BR with PE results in a remarkable enhancement of tensile strength, modulus and the elongation at break simultaneously. An increment of tensile strength from 1.11 MPa to 16.26 MPa was achieved by incorporation of 40 wt% PE in the blends. The modulus and elongation at break of 40/60 PE/BR blends are also about 5 times higher than those of the pure BR treated under exactly the same conditions. The tear test indicates that the tear strength also increases with the increase of PE content. It reaches 58.38 MPa for the 40/60 PE/BR blend, which is approximately 10 times higher than that of the pure BR. Morphological study demonstrates that the PE forms elongated microdomains finely dispersed in the BR matrix when its content is over 30 wt%, which corresponds to the remarkably enhanced mechanical properties.According to the results, reinforcement mechanism of PE toward BR dependent on the microstructure has been discussed and two different mechanisms have been proposed.
文摘以异戊二烯(Ip)为单体,Al(i-Bu)3(简称Al)/TiCi4(简称Ti)为催化剂(以100 g Ip计,Al、Ti的用量分别为2.27～3.77 mmol、4.08～6.81 mmol),芳香醚为活化剂,合成了异戊二烯橡胶(IR),考察合成钛系IR的影响因素,并将合成的钛系IR与日本Zeon公司生产的钛系IR的性能进行对比。结果表明,采用Al/Ti/芳香醚体系,可合成出顺式-1,4-结构质量分数大于97.00%的IR,适宜的Al/Ti(摩尔比)为0.9～1.2;合成的钛系IR的顺式-1,4-结构含量和硫化胶的物理机械性能与Zeon公司生产的钛系IR相当。
