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通过阴离子开环聚合法制备纳米二氧化硅(Si O2)/MC尼龙6原位复合材料,采用透射电子显微镜(TEM)对纳米粒子在基体中的分散行为进行表征,结果表明Si O2约以30～70nm左右的尺寸均匀分散在基体中。广角X射线衍射(WAXD)结果表明,纯MC尼龙6及其原位复合材料均呈现典型尼龙6的α晶型衍射峰,纳米Si O2的引入在MC尼龙6结晶过程中削弱了大分子链在c轴的取向。液氮淬冷样品经退火处理后的WAXD结果表明,纳米Si O2和MC尼龙6之间的相互作用阻碍了大分子链段的运动,从而使得γ晶型向α晶型的转变速率降低。
Nanosilica (Si O2) / MC nylon 6 in-situ composites were prepared by anionic ring-opening polymerization. The dispersion behavior of nanoparticles in the matrix was characterized by transmission electron microscopy (TEM). The results showed that Si O2 was about 30 The size of about 70 nm is uniformly dispersed in the matrix. WAXD results show that the pure MC nylon 6 and its in-situ composites exhibit the α crystal diffraction peaks of the typical nylon 6, the introduction of nano-Si O2 weakens the macromolecular chains during the MC nylon 6 crystallization c-axis orientation. The results of WAXD after the liquid nitrogen quenched sample annealed showed that the interaction between nano-Si O2 and MC nylon 6 hindered the movement of the macromolecular chain segment and the conversion rate of γ crystal to α crystal decreased.