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- Keywords Poly DL Lactide Ring opening Polymerization Average Molar Mass; 聚DL丙交酯;开环聚合;平均摩尔质量;
- Z+1 average molar mass Z＋1均分子量
- It was concluded that the parameters of dilatational viscoelasticity changed with the increase of molar mass of fractions or dilatational frequency. 结果表明，伊朗重质减渣馏分的扩张粘弹性参数随馏分的增重以及扩张频率增大而递变。
- The molar mass (MM) of polymer HPAM suitable for use in polymer flood in middlle-low permeability reservoirs of Daqing is studied. 对可用于大庆油田中低渗油藏聚合物驱的聚合物HPAM的适宜分子量进行了研究。
- Z 1 was able to eat the PLL whose length is less than 0 4mm Z 5 can eat any sizes of PLL instead of being eaten by PLL So we can handle and take advantage of PLL under certain conditions. Z1可摄食体长小于 0 4mm的PLL ,Z5则完全可以PLL为食而不受其害 ,因此 ,可根据具体条件控制利用PLL。
- According to the Bonuli law of conservation of energy, there are two ways to the engineering distribution,that is,to raise the erosion base point Z 2 and to lower the erosion source point Z 1,therefore,the concept of drop dam was introduced. 根据伯努里能量守恒定律 ,工程布设应分为抬高侵蚀基点 Z2 与降低侵蚀源点 Z1 两种途径。 为此引进跌水坝概念。
- A device for determining molar mass with freezing point depression was improved,which consists of the Dewar bottle,sample container,Beckmann thermometer,and motor stirrer. 介绍一个改进的凝固点下降法测定摩尔质量实验装置,它由保温瓶、凝固点杯、贝克曼温度计、电动搅拌器等几部分构成。
- The measures include properly selecting numbers of chain teeth, Z 1, Z 2, link span p , selecting bigger link span, single row chain as driving lower power, and properly selecting material, configuration and heat treatment process of chain-wheel. 为此 ,通过对工况及其受力分析 ,提出了相应的解决方法 ,即合理选择链轮齿数Z1、Z2 以及链节距 p ; 在传递功率不太大时 ,在一定范围内尽量选择大节距、单排链 ;
- With zinc D, L-lactate as catalyst, which is safe to body, PDTC with Mw as 700000g/mol was prepared when the reaction mixture was irradiated for 75min under 180W microwave power. This method was proved to be ideal for preparing PDTC with high molar mass. 作者使用对人体安全可靠的D，L-乳酸锌为催化剂，进行DTC的微波开环聚合，在180W的微波功率下辐照75min，得到了重均分子量为700000g/mol的PDTC，这一方法是合成高分子量PDTC的理想方法。
- Polystyrene polymethacrylate diblock copolymers with well defined structures asw- ell as controlled and narrow molar mass distribution were obtained from the lower mass polystyrene macroinitiator. 聚苯乙烯 -聚甲基丙烯酸酯嵌段共聚物的分子量可控 ,分子量分布较窄 ,单体转化率较高。
- Dave's Molar Mass and Percent by Mass Calculator 分子量及元素百分比计算器
- The mensuration of molar mass of organic acid 有机酸摩尔质量的测定
- of“ Nascent” ultra high molar mass polyethylene J . Chinese J Polym Sci , 2001 , 19 (1) : 25230. 2范仲勇;王一任;卜海山.;冷冻升华制备的超高分子量聚乙烯寡链、多链晶体的凝聚态J
- This city has a population of more than 1,000,000. 这个城市人口超过一百万。
- Average grain output per mu has reached 1,300 jin. 平均亩产量达到了1,300斤。
- Keywords Z ） 1 [2 （tribenzylstannyl）vinyl] 1 cycloheptanol;synthesis;property; （三苄基锡基）乙烯基]环庚醇;合成;性质;
- On average,bacterias are about 1 micrometre long. 细菌的平均长度大约1微米。
- molar mass average 摩尔质量平均
- These socks retail at 1 dollar a pair. 这些袜子零卖一美圆一双。
- This mountain is 1,400 meters above sea level. 这座山海拔1,400米。
