| Take principle and various factors relevant to the polymerization of MC Nylon into consideration,improve its experimental devices,MC nylon was prepared by static-casting.Properties of MC nylon were tested and presented,such as water absorption,shrinkage ratio,shore hardness, tensile strength,impact strength,ect.Then,the optimization of experimental parameters for the polymerization follows as:reach at less -0.099MPa on vacuum meter,0.15w%CL of catalyst content,0.36w% CL of activator content,add the catalyst at 120℃and vacuum-pumping for 30 min,drip the activator at 155～160℃,pour them into the mold while heat up to 170℃beforehand,hold on 30min in the constant temperature oven.The composites of MC nylon were prepared by adding same modifiers at different places and their properties were also presented.The results show that,compared to others,the properties of MC nylon are better when modifier droped with catalyst. La2O3 and La2O3 modified by KH-550 were used as assistants in the polymerization of MC nylon.And the effect of additions on properties of the composites has been studied.The results show that La2O3 and La2O3 modified by KH-550 could contribute to reinforcing MC nylon's physical and mechanical properties,including water absorption,shrinkage ratio, shore hardness,tensile strength and impact strength.In addition, compared with La2O3,La2O3 modified by KH-550 takes the advantage in modifying MC nylon.Effect of the addition of VP-401 on properties of MC nylon composite was also researched.The conclusions indicate that ultra-fine full-vulcanized powdered rubber VP-401 can improve MC nylon's impact-strength and water absorption ratio.When the content is 0.4w%, the composite's notch-impact strength,the composites' over-all properties are excellent.Compared to pure MC nylon,flexural strength,and elongation at break of composites could increase 71.5%,50%,55.5%;the water absorption ratio decreases 42.3%,while tensile strength and hardness only lose 7.2%and 2%respectively.
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