Synthesis and Charaterization of Poly(butylene succinate) with Different Relative Molecular Weights
Poly(butylene succinate) (PBS) products with different relative molecular weights were synthesized using succinic acid and 1,4-butanedioby as materials by solution polymerization-melt polycondensation in presence of catalyst. The catalytic properties of four different catalysts for the synthesis of PBS were studied. The structure,thermal stability,molecular weight and mechanical properties of the products were characterized by GPC,FTIR,1H-NMR,DSC,TG,and mechanical tensor. The experimental results show that the relative molecular weight of PBS prepared by different catalysts:P-Toluenesulfonicacid>Ti(iO Pr)4>SnCl2>Zn(OAc)2>without catalyst. The maximum relative number average molecular weight is 5.57×104 and the minimum is 2.54×104. The thermal decomposition temperatures of all the synthesized PBS are more than 250℃,and all of them have better thermal stability. Among them,the obtained PBS has good mechanical properties using the Ti(iOPr)4 and SnCl2 as catalysts. Based on the above results,PBS synthesized by Ti(iOPr)4 has a molecular weight of 5.50×104,and its mechanical properties are also excellent,the tensile strength is 34.5 MPa, the elongation at break is as high as 201%.
NETL
NSTL
万方数据
维普
