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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.
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。
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。
Based on this monomer, several novel polyimides bearing side chains composed of cyano-biphenyl mesogenic end groups and hexylene spacer were prepared. 合成了一种含氰基联苯氧基侧链的二元胺单体,然后通过两步法热酰亚胺化工艺制备了新型的含氰基联苯基团侧链的聚酰亚胺。
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。
The effects of the end groups of PC, molecular weight and its dispersion, and additives on the thermostability of PC were introduced. 介绍了聚碳酸酯端基、摩尔质量及其分布、添加剂等对聚碳酸酯热稳定性的影响；
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。
This paper describes a new class of macromolecules - dendrimters which are highly branched and possess many reactive end groups. 本文介绍了一类高度支化、带有很多末端官能团的新的大分子化合物-树形物。
Perfluorinated ethylene-propylene is an important plastic, but the unstable end groups must be stabilized before sale. Several stabilized treatments were reviewed in this paper. 摘要聚全氟乙丙烯是一种重要的特种塑料，但需要对不稳定末端基进行处理才能作为商品出售，本文综述了聚全氟乙丙烯不稳定末端基的几种稳定化处理方法。
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。
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。
PAMAM maybe used as an extranctant by modification of its end groups with long-chain alkyl.Few papers reported the application of PAMAM as an extracta... 用长链烷基对PAMAM进行端基改性作为萃取剂的应用研究,目前国内外文献还未见报道,因此对其开展研究将具有十分重要的意义。