封端

通过DSC和TGA研究了不同封端剂和不同多元醇对封端型异氰酸酯加成物解封温度的影响。

The influence of different blocking agents and polyols on the deblocking temperature was studied by differential scanning calorimetry ( DSC ) and thermogravimetric analysis ( TGA ) .

苯酚封端THEIC/异氰酸酯加成物反应的研究

Study on the blocking reaction of theic / diisocyanate adducts

活性自由基聚合法制备以C（60）封端的聚苯乙烯

Preparation of C_ ( 60 ) - end-Capped Polystyrene with Living Free Radical Polymerization

对一种醚基封端硅碳型聚氨酯软泡匀泡剂H－420的合成、发泡性能进行了研究并与同类匀泡剂比较性能。

An ether-capped Si-C surfactant ( H-420 ) for flexible PU foam has been developed and studied .

乙二醇二缩水甘油醚封端的PS遥爪低聚物的合成与表征

Synthesis and characteristic of glycol diglycidyl ether terminated PS telechelic oligomer

油酸封端的C（36）二聚酸/PEG/PPG聚酯的合成及其消泡抑泡性能

Synthesis and defoaming performance of polyester by condensation of C_ ( 36 ) dimer fatty acid and PEG / PPG with oleic acid as end block

封端异氰酸酯对低粘度PBT改性的研究

Study on modification of low viscosity PBT with blocked isocyanate

扩链剂对TDI封端聚醚预聚物反应速度的影响

The influence of chain extenders on the reaction rate of polyether-urethane prepolymers

封端温度控制在155℃；加成时间为3h时，合成的树脂具有良好的气干性。

The temperature for capping end group is 155 ℃ and the addition time is 3 h.

本文将端羟基封端和端羧基封端的聚氨酯（PU）预聚物分别与酚醛树脂（PF）固化，制备了两种体系的增韧复合物。

The hydroxyl - terminated and carboxyl - terminated PU - prepolymer were prepared and cured respectively with PF .

利用异氰酸酯（&NCO）封端的聚氨酯（PU）预聚物同丙烯酸／丙烯酸羟丙酯共聚物（PA）反应得到聚氨酯接枝聚丙烯酸共聚物网络。

The copolymer networks were prepared by the reaction of isocyanate terminated PU prepolymer with acrylic acid / hydroxy propyl ester acrylate .

高SiOH含量下漏电流的降低是由于封端的SiOH基团降低了薄膜中SiO网络的连通概率p而导致网络电导下降的缘故。

The decreasing of leakage current at high Si OH content is due to the low connecting probability p of networks because the networks break at the terminal Si OH groups .

以顺丁烯二酸酐封端的PMR聚酰亚胺树脂的研究

The study of PMR Polyimide by using maleic anhydride as endcap

以苯酚为封端剂，甲苯为溶剂对六亚甲基二异氰酸酯（HDI）进行了封端反应。

The blocking reaction between Phenol and Hexa-diisocyanate with toluene as solvent has been studied .

甲基丙烯酸封端的复合乳液生成交联型聚合物，PU的硬段和硬段间的氢键也受到破坏。

While the containing the methacrylic end group is almost fully crosslinked , there is less hard-hard segment of PU hydrogen bond in the hybrid polymer .

合成NCO封端的预聚物的过程中，考察了反应时间，反应温度和原料配方对最后产物性能的影响。

The influence of reaction time , reaction temperature and the recipe in the prepolymerization step were investigated .

探讨了多元醇的最佳配合比例、预聚体NCO含量以及封端剂的选择。

The optimum polyol composition , isocyanate group content of the prepolymer and end-capping agent selection were discussed .

封端反应中，反应温度150℃，反应时间5h；

The reaction temperature is 150 ℃ and the reaction time was 5h in the end capping reaction .

封端率对PTMG型聚氨酯胶黏剂性能的影响

Effect of End - closing Rate on Performance of PTMG Polyurethane Plastic Adhesive

本文以环氧树脂EP作为基体，通过异氰酸酯封端聚氨酯PU接枝改性环氧树脂EP制备EP-g-PUIPN体系作为阻尼材料的基体。

Epoxy resin was selected as the matrix , EP-g-PU IPN was prepared through epoxy resin modified by isocyanate terminated polyurethane .

本文介绍了适用于RTM成形聚酰亚胺材料的研究进展，主要包括采用降冰片烯酸酐（NA）封端的PMR聚酰亚胺树脂和使用苯乙炔基封端剂合成的聚酰亚胺树脂。

RTM polyimide materials mainly including the PMR polyimides end-capped with nadic anhydride ( NA ) and phenylethynyl end-capped polyimides were reviewed in this paper .

因此，对PPC进行化学封端改性，并借助其他可生物降解材料对其进行熔融复合改性，是一种既经济又有效的重要方法。

It is economical as well as effective method to take chemical end-capping modification of PPC and melt blending modify it with the help of biodegradable materials .

通过将制得的不同类型端羟基聚醚离子液体扩链合成NCO封端的聚氨酯，进一步制备为聚合物固体电解质。

Using various kinds of end hydroxyl polyether ionic liquids , polyurethane was synthesized from chain extension , and then solid polymer electrolyte was prepared .

当PDMS链的重复单元数达到60-70时，单羟基或双羟基封端的聚PDMS都足以阻止在接触角测量过程中发生表面重排。

The chain length of60-70 DMS repeating units for both mono-and bi-functional PDMS appeared to be long enough to prevent the surface reorganization during the CA measurements .

结果表明，KF表面酰氯化、己内酰胺封端并经阴离子接枝尼龙6处理的PA6/KF1复合材料的拉伸强度和弯曲强度均得到明显提高，弯曲模量基本不变，冲击强度则有所下降。

The results show that the PA6 / KF1 composite ′ s tensile strength and flexural strength are inproved , but the impact strength is declined .

一种新型引发剂的合成及其在制备全氟封端F30树脂中的应用

Synthesis of a new initiator and application in preparing F30

本文系统考察了反应温度、HMDS用量、反应时间及封端次数对C18硅胶填料惰性化效果的影响。

Effects of reaction temperature , HMDS amount , reaction time and times of endcapping on endcapping reaction were systematically studied .

通过聚氨酯预聚体法合成出硅烷KH-550封端的聚氨酯热熔胶（SPUR），并制备了一系列不同封端率的硅烷化聚氨酯热熔胶。

Silylated hot melt moisture cured polyurethane adhesive ( SPUR ) was prepared with KH-550 , and a series of polymer was synthesized with different silane ending ratio .

在反应溶剂介质（乙醇）中，通过加入交联剂以分散共聚方式合成了甲基丙烯酸单封端聚乙二醇（PEG）接枝聚丙烯酸Poly微凝胶。

The pH-responsive microgels of polyethylene glycol graft poly ( acrylic acid ) ( PEG-g-PAAc ) were prepared by dispersion copolymerization in ethanol in the presence of N , N - methylenebisacrylamide ( Bis-A ) as cross-linker .

研究了烯端基单体摩尔比对PAR热性能的影响，PAR-E失重5%的分解温度比未封端的PAR要出20～30℃。

Studied end-ene monomer molar ratio on the thermal properties of PAR , allyl ester-terminated poly 5 % weight loss decomposition temperature than the non-sealing side of the PAR to 20 ~ 30 ℃ .