1) cyclic polymer
环状聚合物
1.
Cyclic topological polymers including single and multiple cyclic polymers have gained growing interest due to their unique properties unlike branched and linear topological polymers.
环状聚合物包括单环和多环聚合物,是一类具有特殊拓扑结构的聚合物,具有不同于支化聚合物的特殊性质,引起了人们广泛的关注。
2.
Cyclic polymers with various chemical structure,composition,molecular characteristics,and architectures are paid steadily increasing attention,because cyclic polymers possess higher density,molecular weight-dependent melt viscosity,higher refractive index,and higher glass transition temperatures as compared to linear polymers.
环状聚合物由于比线性聚合物拥有更高的密度、熔融粘度、折射率和玻璃化转变温度,而受到越来越多的关注。
2) cyclic oligomer
环状齐聚物
1.
High performance liquid chromatographic(HPLC) method was adopted to determine the content of caprolactam and its cyclic oligomers in these chips.
用原位聚合方法,在相同条件下制备了聚酰胺6(Polyamide 6,PA6)/SiO2纳米复合材料及纯PA6,并用高效液相色谱法(High Performance Liquid Chromatographic Method,HPLC)测定了其切片中的己内酰胺和环状齐聚物的含量。
2.
A high\|performance liquid chromatographic method (HPLC) was adopted to determine ε\|caprolactam and its cyclic oligomers in nylon 6 chip.
用高效液相色谱法 (HPLC)测定了尼龙 6切片中的己内酰胺和环状齐聚物。
3) cyclic oligomer
环状低聚物
1.
Three amorphous aromatic polyether sulfone(ketone)s with different structures underwent a cyclo-de~po~ly~meri~zation reaction using CsF as the catalyst in dipolar aprotic solvents such as DMAc and DMF to afford corresponding cyclic oligomer products.
几种线性高分子量的无定型聚芳醚砜 (酮 )在非质子极性溶剂二甲基乙酰胺 (DMAc)和二甲基甲酰胺 (DMF)中 ,以氟化铯 (CsF)为催化剂进行解聚成环 ,所得环状低聚物由凝胶渗透色谱 (GPC)、高效液相色谱 (HPLC)和激光质谱 (MALDI TOF MS)确认 ,其中酚酞聚醚砜 (PES C)和酚酞聚醚酮 (PEK C)的解聚成环率分别高达 86。
4) ring copolymer
环状共聚物
1.
Electronic properties of ring copolymers;
环状共聚物的电子特性研究
5) Cyclic oligomers
环状低聚物
1.
Cyclic oligomers of poly(trimethylene terephthalate)(PTT) were prepared by reaction of 1,3 propanediol with terephthaloyl chloride(TPC) under diluted conditions and separated from the linear products by silica gel column.
探索了由对苯二甲酰氯和 1 ,3-丙二醇在“假高稀”条件下合成聚 (对苯二甲酸 -1 ,3-丙二酯 ) ( PTT)环状低聚物的可行性 。
2.
In view of several hazards of cyclic oligomers in PET,several characterization of cyclic oligomers were reviewed.
鉴于环状低聚物的诸多危害,归纳了PET中环状低聚物的表征方法,具体介绍了低聚物的分离方法及其性能的研究方法,重点总结了目前减少环状低聚物含量的一些新的措施和方法,以期为今后的相关研究提供参考,并提出应该建立工业上简便易行的环状低聚物含量检测方法。
6) cyclic dimer
环状二聚物
补充资料：环状胰腺
环状胰腺
属先天性畸形。是胚胎期背侧和腹侧胰芽的愈合位置不正常而将十二指肠降部环绕，压迫十二指肠，造成外因性梗阻。常合并先天性十二指肠闭锁和狭窄。临床表现轻者可无症状，重者于初次喂乳后即呕吐，呕吐物常含胆汁，偶为咖啡样物，可见上腹胀及胃肠蠕动波。X线钡餐检查可确诊。需手术治疗。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条