Synthesis and characterization of in-situ modified monomer cast nylon 6 composites
In order to improve the comprehensive performances of monomer cast nylon 6(MCPA6),ethylene-octene copoly-mer(POE)and hollow glass microspheres coated by polyurethane(TPU@HGM)were added to the MCPA6 synthesis system for in-situ modification,then MCPA6/POE and MCPA6/POE/TPU@HGM composites were prepared.The effects of POE and POE/TPU@HGM on the structure and properties of composites were studied.The characterization results of Fourier transform infrared spectrum show that the synthesized polymer is MCPA6.The test results of mechanical properties show that the elongation at break and notched impact strength of the material are improved with introduction POE into MCPA6,but the tensile strength of the material is reduced.Compared with neat MCPA6,the tensile strength,elongation at break and notched impact strength of MCPA6/POE/TPU@HGM composite increase by 32.23%,110.07%and 114.36%respectively,which realizes the effect of reinforcing and tough-ening.With the addition of POE and TPU@HGM,the decomposition temperature and carbon residue rate of the composite is improved,and the thermal stability of the composite is improved.In addition,the crystallization of MCPA6 in the composite is hindered by POE and TPU@HGM,resulting in a decrease in crystallization temperature,slower crystallization rate,incomplete crystal structure,and lower melting point.
NETL
NSTL
万方数据
