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- The structure was verified by 1H-NMR,GPC and end group titration techniques. 通过核磁共振氢谱(1H-NMR)、凝胶渗透色谱(GPC)、端羟基滴定等方法;研究了所合成的三嵌段共聚物的结构.
- end group titration 端基滴定
- And the IR analysis shows that silicone resin possesses hydroxyl end group. 红外光谱(IR)显示,合成的硅树脂含有端羟基。
- The measurement of carboxyl end group content in PBT was discussed with an automatic potentiometric titrator. 采用全自动电位滴定仪测定PBT切片的端羧基含量,对称样量、溶剂的配比、滴定剂的浓度等进行了正交优化。
- The carboxyl end group value control of Du pont's polyeser technology in direct spinning process is studied. 本文从工业生产的实践出发对杜邦聚酯技术直接纺工艺中端羧基控制进行了研究。
- The reasons for the carboxyl end group fluctuation of bottle grade PET base chips were analysed. 摘要对瓶用基片端羧基波动的原因进行了分析。
- The dendrimers of amino as end group have no visbreaking effect on the crude oil. 端基为氮基的树状大分子对原油不具有降黏效果。
- Mechanical property test, end group analysis and SEM were adopted to study the ageing of PET and PBT composite... 采用拉伸强度与冲击强度测试、端基分析及扫描电镜分析等手段探讨了PET、PBT复合材料的老化机理和老化性能。
- The results show that the dendrimers of ester as end group have visbreaking effect on the crude oil. 5代树状长链酯对原油的降黏性能,分析了树状大分子的端基结构对原油降黏性能的影响。
- The results showed that the compatibilizer could react with the end group of PET,meanwhile,it was compatible with SEBS very well. 结果表明,增容剂能够与PET的末端羧基发生反应,并与SEBS有很好的相容性。改性PET的结晶度降低,晶粒尺寸减小,缺口冲击强度提高。
- The isothermal crystallization curves of PPS and its blends both exhibitdouble peaks because of the different end group structure of PPS. 经等温结晶处理的试样,在熔融时相应的PPS也呈现双峰,其低温峰随结晶温度的提高而向高温方向移动。
- Results indicate interestingly that the double bond of GMA polymerized with polystyryl carbanion and the molar ratio of epoxy end group and polystyrene oligomer can be adjusted. 结果表明：在GMA与聚苯乙烯阴离子反应的过程中，GMA在活性种的终端发生了聚合，所得产物中环氧端基与聚合产物的摩尔比可根据需要进行调节。
- The ethanol used as solvent in polymerization may be introduced intopolymer, forming end group structure, dominantly RCH:CHCH_2CH(OH)CH_3 (cis andtrans). 确定了在聚合过程中乙醇转移到分子链端的主要结构是RCH=CHCH_2CH(OH)CH_3(顺式和反式),它占羟基总量8%25左右。
- It wasconcluded that the problem of carboxyl end group amount increase caused by the increase of loads will besolved through advancing the the loads in PET production process. 结论：可以通过工艺过程的负荷前移的方法，解决提高负荷而带来的端羧基含量升高问题。
- The accident put an untimely end to the party. 意外事故使聚会匆匆结束了。
- The boys were itching for the lesson to end. 那些男孩子们渴望下课。
- Of these end groups those having an allylic chlorine might be expected to show the highest activity. 在这些端基中，带有烯丙基氯原子的端基活性最高。
- The mass spectra of ureide-type noncyclic polyethers with 2(3H)-benzoxazolone as end groups were studies. 研究了以2（3H）-苯并唑酮为端基、具有酰脲结构的非环多醚化合物的质谱。
- In order to improve its use, it is necessary to modify the end groups of the HBP by hexadecanoic acid. 为了拓宽其使用范围,用棕榈酸(十六碳酸)对超支化聚酯进行端基改性,成功地找出了提纯的方法,并进行了表征。
- It's natural to slack2 off towards the end of a hard day's work. 一天紧张工作快结束的时候有些放松是自然的。
