Melting technique disadvantages

None of these materials are free from disadvantages mainly non-processibility by solvent or melt techniques, poor mechanical properties after doping, and most distressing, their environmental instability. These problems have greatly impeded their use in various novel applications. Furthermore, the proper characterization of organic conductive polymers has remained very difficult due to their intractability. Recent research activities have led to the realization that such polymers... 

The disadvantage of lasers with nanosecond-picosecond pulse duration for depth profiling is the predominantly thermal character of the ablation process [4.229]. For metals the irradiated spot is melted and much of the material is evaporated from the melt. The melting of the sample causes modification and mixing of different layers followed by changes of phase composition during material evaporation (preferential volatilization) and bulk re-solidification [4.230] this reduces the lateral and depth resolution of LA-based techniques. 

Prior work related with shutdown separators also involved application of waxes on membranes." " In these cases, the wax or low melting polymers were coated on the polyolefin separator. The disadvantage of this technique is that the coating can block the pores of the separator and thus can affect the performance by increasing separator resistance. Moreover, the coating level has to be very high to get complete shutdown. 

Various techniques, such as melted wax cooling [74], spray freezing [75], direct high speed photography [76], and Laser Dopier Analysis (LDA) system [77, 78] etc., have been used to measure the sizes and/or size distribution of spray droplets, and each has its own advantages and disadvantages or difficulties for practical application. 

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