In this process, the polymer is swollen or dissolved in highly fluorinated solvents near the melting point of the polymer, and a working gel forms when the mass is cooled to room temperature. Several perfluorinated cycloalkanes are stated to be suitable solvents for this process. ...
The uniformity of thin melt-blown webs which is produced oflow melting point copolyamideby melt blowing line with accessory device was tested by weight method. 采用称重法对在添加了辅助装置的熔喷设备上制得的以低熔点共聚酰胺为原料的热熔纤网的均匀性进行了测试。
On the other hand, the Tc,onset of the resins was found to be the deciding factor on how far below the melting point of the polymer foaming can be induced. While the volume expansion of all three resins diminished gradually as Tfoaming approached Tc,onset, the relatively lower Tc,onset ...
On the other hand, the Tc,onset of the resins was found to be the deciding factor on how far below the melting point of the polymer foaming can be induced. While the volume expansion of all three resins diminished gradually as Tfoaming approached Tc,onset, the relatively lower Tc,onset ...
The value of flow time was an average of three values with a standard deviation within ±0.2 s. The flow time of H2SO4 and each of the polymer solutions were used to calculate the relative and specific viscosities. Single point intrinsic viscosities were then calculated using the Solomon and...