查询词典 Dlla

The affections on the yield of DLLA caused by temperature, pressure, and time etc. were studied. The result product was characterized and analyzed by using DSC, XRD and IR.

研究温度、压力、时间等因素对DLLA产率的影响，利用DSC、XRD、IR等分析测试技术对DLLA的性能和结构进行相关的测试和表征。

Under the catalytic reaction of Sn 2-ethyhexanoate (ZnOct2), lactic acid was used to synthesize DLLA in the experiment.

文中以D，L-乳酸为原料，在催化剂辛酸亚锡(ZnOct2)的作用下，合成DLLA。

The results show that the distillate temperature of DLLA is lowed by the addition of diluent ethylene glycol, and the carbonization phenomenon can be avoided, which increases the yield of DLLA from 36.8% to 51.3%.

研究结果表明，在反应体系中加入乙二醇作为稀释剂，能降低DLLA的馏出温度，避免了DLLA在蒸馏过程中产生炭化现象，并使DLLA的平均产率由36.8%提高至51.3%。

The affections on the yield of DLLA caused by catalyst, temperature and time etc. were studied. By using ethylene glycol as diluent, the distillate temperature of DLLA was lowed and the carbonization phenomenon could be avoided, which caused the yield of DLLA increasing from 36.8% to 51.3%. The molecular weight of PDLLA prepared by this method could reach 184,000. DLLA and PDLLA was characterized and analyzed by DSC, XRD and IR.The key of direct method to synthesize PDLLA is the exclusion of H2O from reaction system.

丙交酯开环聚合制备PDLLA的关键在于中间体D，L-丙交酯的制备，研究了催化剂、反应温度、反应时间等因素对DLLA产率的影响，通过在反应体系中加入稀释剂乙二醇，DLLA的馏出温度明显降低，避免了DLLA在蒸馏过程中产生碳化现象，并使DLLA的平均产率由36.8％提高至51.3％，制备的PDLLA分子量最大值达18.4万。

PDLLA/β-TCP composite was obtained by mixing β-TCP and DLLA in a certain proportion prior to ring-opening polymerization when Sn2 as initiator in a vacuum circumstance and a constant oscillation.

以辛酸亚锡作引发剂，将一定比例的β-磷酸三钙与DL丙交酯混匀后在真空体系下开环聚合，并持续均匀振荡，得到PDLLA/β-TCP复合材料。

PDLLA/β TCP composite is obtained by mixing β-TCP and DLLA in a certain proportion prior to ring-opening polymerization using Sn2 as initiator in a vacuum circumstance and a constant oscillation.

以辛酸亚锡作引发剂，将一定比例的β-磷酸三钙与DL丙交酯混匀后在真空体系下开环聚合，并持续均匀振荡，得到PDLLA/β-TCP复合材料。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。