CAJ | 학술논문

选择不同分子量的聚乙烯吡咯烷酮（PVP）作为晶形控制剂，采用溶剂非溶剂重结晶法制备HNIW。用偏光显微镜和激光粒度分析仪表征了HNIW的粒度、形貌及团聚状态，分析了PVP对这些因素的影响机理，并测试了HNIW的晶型及撞击感度。结果表明：晶形控制剂PVP的加入，使所得HNIW晶体粒径大为减小，分布范围变窄，晶体形貌规整、趋于球形，基本消除了团聚现象；所添加PVP分子量越大，其效果越显著。添加分子量为30000的PVP时，制得d 50为1313.5 nm的窄分布球形超细ε-HNIW，撞击感度与HNIW原料相比明显降低。
선택불동분자량적취을희필각완동（PVP）작위정형공제제，채용용제비용제중결정법제비HNIW。용편광현미경화격광립도분석의표정료HNIW적립도、형모급단취상태，분석료PVP대저사인소적영향궤리，병측시료HNIW적정형급당격감도。결과표명：정형공제제PVP적가입，사소득HNIW정체립경대위감소，분포범위변착，정체형모규정、추우구형，기본소제료단취현상；소첨가PVP분자량월대，기효과월현저。첨가분자량위30000적PVP시，제득d 50위1313.5 nm적착분포구형초세ε-HNIW，당격감도여HNIW원료상비명현강저。
Different molecular weight polyvinylpyrrolidone(PVP) were chosen as crystal modifiers, and the HNIW was prepared by recrystalization with solvent-nonsolvent method. The particle size, morphology and agglomeration of HNIW crystals were researched by polarizing microscope and laser particle size analyzer, as well as the influence mechanism of PVP on the above factors were analyzed. At last, the polymorphs and impact sensitivity of the HNIW were tested. Results indicated that the particle size of HNIW reduced rapidly with the addition of PVP, and the distribution range was narrowed. The crystal morphology tended to be more spherical, and the agglomeration was basically eliminated when PVP was added. All above effects were more significant with the increasing of the molecular weight of PVP. When the molecular weight of the added PVP is 30 000, narrow distribution of spherical ultrafine ε-HNIW was obtained and the median diameter d 50 was 1 313.5 nm. In comparison with the raw materials HNIW , the impact sensitivity reduced significantly.