对硅灰石粉的表面改性效果及填充ABS塑料力学性能的研究表明,不同的改性剂、改性剂用量、改性时间等工艺条件对硅灰石的改性效果有重要影响。经γ-(甲基丙烯酰氧基)丙基三甲氧基硅烷改性后的硅灰石填充工程塑料ABS,增强了复合材料的刚性和熔体流动性,其他力学性能虽有小幅下降,但不影响其在工程上的使用;同时降低了ABS塑料使用的成本,在填充量为20%时,可降低成本15%。
Surface modif ication of wollastonite and mechanical property of wollastonite-f illed ABS were studied.The results showed that different modifi cation reagent, quantity of modifi cation reagent, time of modifi cation would affect surface modifi cation of wollastonite. Wollastonite treated by γ-methacryloxypropyl trimethoxy silane f illed ABS can improve composite’s rigidity, but its other mechanical properties had little decline. Wollastonite- Filled ABS not only can reduce its cast ,but also didn’t effect ......
试验研究纳米碳酸钙对SBR胶料性能的影响。结果表明,单用纳米碳酸钙填充SBR时,随着纳米碳酸钙用量的增大,胶料的硫化速度加快,硫化胶的硬度、拉伸强度和撕裂强度增大,回弹值减小,耐磨性和抗湿滑性能提高;纳米碳酸钙与炭黑N330并用填充SBR时,随着纳米碳酸钙用量的增大,胶料的硫化速度变化不大,硫化胶的拉伸强度和撕裂强度减小,回弹值减小,耐磨性下降,抗湿滑性能提高。...
利用力学性能、比表面积(BET)等测试方法考察了钛酸酯偶联剂(NDZ-311)对滑石粉(Talc)的表面改性作用。研究发现,在基体材料具有一定韧性的条件下,经NDZ-311表面改性Talc能有效提高复合体系的冲击性能,与未改性Talc填充的复合材料相比,其缺口冲击强度可提高57.7%。利用FT-IR、SEM等考察了无机刚性粒子增韧PP的结构形态及增韧机理,结果表明,NDZ-311在改性Talc过程中,两者间除发生物理吸附作用外,还发生了化学作用,在Talc表面形成了牢固的包覆层,改变了无机粒子的表面性能。
Titanate coupling agent(NDZ-311) was used as surface modifier to treat Talc.The test of mechanical properties and BET of PP/POE composites demonstrated that NDZ-311 can considerably improve the Izod notched impact strength 57.7%.At the same time,the FT-IR spectrum analysis revealed that NDZ-311 bonds to the Talc surface by physical absorption and by chemical reaction.The NDZ-311 can change the surface properties of Talc,resulting in greater hydrophobic property of the surface and enhanced compatibility with......
采用液相萃取法,通过四氢呋喃从水相中萃取出硅酸,经有机醇共沸蒸馏,制备了表面酯化改性纳米二氧化硅的醇分散液,其外观透明、均匀稳定,二氧化硅含量可高达35%,达到纳米级分散。研究了在少量纳米二氧化硅作用下,纳米复合聚酯涂膜的物理机械性能。结果表明,少量纳米SiO2能提高涂膜的硬度、耐磨性和紫外吸收性能,不影响透明度。
Silica was extracted from the sodium silicate solution to THF firstly,and then the nanosilica alcohol solution was prepared by distillation.The solution was stable,uniform and clear.The content of SiO2 could be up to 25%.SiO2/polyester composite film was obtained by mixing the nanosilica alcohol solution with the polyester.Performance tests of the composite film were carried out according to the national standard.The results showed that the nanosilica alcohol solution had a good compatibility with polyester......
将分散剂、纳米碳酸钙和聚丙烯(PP)切片按一定比例混合纺丝制得改性PP纤维。并研究了改性PP纤维的结构与性能。结果表明:当分散剂与纳米碳酸钙的质量比为1∶3,纳米碳酸钙质量分数为0．3%时,改性PP纤维的断裂强度和初始模量最大,分别为7．97,90．36 cN/dtex．纳米碳酸钙在改性PP纤维中分散均匀,且粒径为40～80 nm。与PP纤维相比,改性PP纤维的取向度变化不大,结晶度有所提高,但当纳米碳酸钙质量分数大于等于2%时,其结晶度下降明显。
The modified PP fiber was prepared by blending a dispersant,nano-calcium carbonate and polypropylene(PP) chips at a specific ratio.The structure and properties of modified PP fiber were studied.The results showed that the breaking strength and initial modulus were maximized as 7.79 and 90.36 cN/dtex respectively when the mass ratio of the dispersant to nano-calcium carbonate was 1∶3 and the content of nano-calcium carbonate was 0.3% by mass fraction.The nano-calcium car- bonate with particle size of 40-80μm......
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