玻璃化

The fast setting adhesive(HT-88)for GFRP was compounded from the prepolymer,low molecular polyamide,phenol aldehyde epoxy resin,bisphenol F type epoxy resin,liquid carboxylated butadieneacrylonitrile rubber,promotor,diluent and fillers.Its pot life,gelling time (at 60 ℃),glass transition temperature and shearing strength for bonding the unsaturated polyester GF...

该预聚物与低分子聚酰胺、酚醛环氧树脂、双酚F环氧树脂、液体羧基丁腈橡胶、促进剂、稀释剂、填料等复配的快固玻璃钢胶粘剂(HT - 88)，在室温下的适用期为 30～ 4 0min ，6 0℃的凝胶时间为 10min ，玻璃化温度 16 0℃，粘接不饱和聚酯玻璃钢的剪切强度为 5～ 7MPa。

heological properties at a low shear rate range(10-2-10s-1) and the glass transition temperatures for PEK-C with different moleCular weithts have been studied by using a cone/plate rheometer and DSC' The activation energy for melt flow increases with Mw The dependence of Tg on molecular weight exhibits two linear range and the value of nitersect agrees with the critical molecular weight , Mc' which is first reported for PEK-C' Mc value obtained according to η0 is about 8× 104 g/mol and the relation between Mc and temperature was dis-cussed.

用锥权流变仪及DSC的方法研究了5种不同分子量的酞侧基聚芳醚酮在低剪切速率区（10－2－10s－1）的流变行为及其分子量与玻璃化转变温度的关系。结果表明，样品的粘流活化能随分子量的增加而增大，Tg随分子量的变化是二个线性区，其交点值与所求的样品的临界分子量值相对应。利用测得的零剪切粘度值（η0）首次求得了PEK—C的临界分子量值。同时也讨论了Mc与温度及η0和Tg与分子量的关系。

The glass transition temperature of the polymers carrying crown ethers as side groups increased when alkali metal ions were added, because the oxygen-metal coordination will lead to the polymer to have order structure.

含有冠醚侧链的高分子在加入碱金属离子后，由于冠醚与金属离子的络合作用导致高分子形成有序结构而刚性增强，其玻璃化转变温度明显提高。

The thermally stable capability and mechanical property of the deuterated foam above were analyzed by the differential scanning calorimetry, dynamic mechanical analysis, stress-strain behavior analysis, and other methods. The results showed that the glass temperature or the decomposed temperature for the prepared foams is 100℃-120℃,or about 400℃, respectively. However, there was the irreversible change in the foams at between 50℃ and 100℃.

结果表明：1泡沫玻璃化温度在100℃-120℃，裂解温度在400℃左右；2在50℃-100℃之间和一定作用力下，泡沫存在不可逆的形变；3室温下(22℃)，随着密度增大，泡沫弹性模量增大，损耗因子减小；在泡沫密度为20 mg/cm3-160 mg/cm3时，弹性模量为2MPa-10MPa，屈服强度为0.01MPa-0.12MPa，破裂形变为5%-35%。

He T-38C incorporates a "glass cockpit" with integrated avionics displays, head-up display and an electronic "no drop bomb" scoring system. The AT-38B has a gun sight and practice bomb dispenser.

-38C把综合航空显示器，抬头显示器，和一个电子模拟得分系统合并成玻璃化座舱。T-38B拥有机炮瞄准装置和训练弹投掷装置。

In this work, a methodology was developed to investigate how glass transition temperature of cured epoxy resins varied with different hardeners.

提出了一个分子动态模拟方法研究环氧树脂玻璃化转变温度随固化剂结构变化。

Two-phase structure of the ionomers was also demonstratedby the dual glass transition indicated in the dynamic mechanical spectra.

处于-40℃～-20℃之间的转变对应于富离子微区中的玻璃化转变，该转变温度与离子基团的含量有关。

Stress fissure, glass transition, moisture content, linear regression model

应力裂纹；玻璃化转变；湿度；线性回归方程

The problems in the curmt methods of measuring glass transition are pointed out and the principle of cryoicroscope-DSC system in T'g measurement is analyzet.

指出了现有的测量T＇g方法中存在的问题，分析了低温显微DSC系统测定T＇g的原理，认为低温显微DSC系统是一种能准确测量玻璃化转变温度T＇g的新型仪器

The results showed that the m-PUE had better heat-resistant properties, lower glass transition temperature, higher thermal decomposition temperature and better damping property. The internal friction peak was changed from 10 ℃ to -10 ℃, while the tan δ was changed from 0.28 to 0.46. The hardness, tensile strength and tear strength of m-PUE decreased with the increase of the THEIC content. However, the swelling ratio of PUE was increased meaning a deteriorated solvent resistance property.

结果表明，引入IS环后，PUE的耐热性能有提高；IS改性的PUE的内耗峰比未改性的窄，峰位由10℃移到-10℃，且内耗峰值增大（tanδ由0.28增大到0.46），玻璃化温度降低，而阻尼性能得到提高；引入IS环的PUE的硬度和其它力学性能比未改性的PUE有所降低；随着固化剂中THEIC用量的增加，PUE的溶胀率增大，即IS改性PUE的耐溶剂性变差。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。