摘要
用原位聚合方法使用球形Ziegler-Natta催化剂制备新型聚丁烯-1合金材料,通过DSC、SEM、XRD和^(13)C NMR等手段对产物的形态、物性和结构进行了表征,考察了丁烯-1加入量对聚合产物形态、结构及聚合性能的影响。结果表明:与丁烯-1本体聚合相比用原位聚合可改善聚丁烯-1产物的形态,降低聚合物粒子之间的粘联,使聚合物在釜内成为球形颗粒,催化活性最高为10.4 kg/g Cat,聚合产物的堆积密度为0.44 g/cm^3,粒径约为500μm;同时,用原位聚合可缩短聚丁烯-1产品由不稳定的晶型II向稳定的晶型I转变周期。聚丁烯-1釜内合金的拉伸强度和弯曲模量都随着丙烯结构单元含量的提高而提高,但是聚合物的密度、冲击强度和断裂伸长率降低。
A new type of polymer alloy of polypropylene/polybutene-1 was prepared by in-situ polymerization with spherical Ziegler-Natta as catalyst. The effect of butene-1 addition on the morphology, structure and the properties of polymer alloy was investigated. The polymers obtained were characterized by means of DSC, SEM XRD and13 C NMR. The results show that compared with the bulk polymerization of butene-1, the in-situ polymerization could improve the morphology of the product made from polybutene-1,and effectively reduce the adhesion between polymer particles. The catalytic activity, stacking density and particle size of the prepared polymer alloy are 10.4 kg/g Cat, 0.44 g/cm3 and 500 μm, respectively.Moreover, the in-situ polymerization could effectively shorten the transition period of the polybutene-1 product from the unstable crystal form II to the stable crystalline form I. The mechanical property test revealed that with the rise of the content of the structural unit in propylene the tensile strength and flexural modulus of the polybutene alloys were increased, however, the density, impact strength and elongation at break were decreased.
作者
任合刚
李振友
闫义彬
王斯晗
崔晓鹏
刘宾元
REN Hegang;LI Zhenyou;YAN Yibin;WANG Sihan;CUI Xiaopeng;LIU Binyuan(Daqing Petrochemical Research Center,Petrochemical Research Institute of CNPC,Daqing 163714,China;Refining and Chemical Branch ofCNPC,Beijing 100007,China;Institute of Polymer Science andEngineering,Hebei University of Technology,Tianjin 300130,China)
出处
《材料研究学报》
EI
CAS
CSCD
北大核心
2018年第7期518-524,共7页
Chinese Journal of Materials Research
