For two films glued together using two component glue.

For the 1st two samples we used poled PVDF films. Using these films we prepared bi and multilayer films. The aluminium film on one side of the film has been removed by etching. The films were glued together in the reverse dipole moment direction using two component glue.For the 2nd two samples we used P (VDF-TrFE) 56/44 mol% and P (VDF-TrFE) 70/30 mol% composite granulate. From these composite granulate, we prepared films by using hot press. These films are unpoled. Films were glued together using two component glue.S1: Sample one consists of two PVDF films, each film thickness is 9?m. These two films glued together in the reverse dipole moment direction using two component glue. Total thickness of the films is 21?mS2: Sample two consists of three PVDF films, each film thickness is 9?m. These three films glued together in the reverse dipole moment direction using two component glue. Total thickness of the films is 30?mS3: Sample three consists of two P(VDF-TrFE) films with different molar and weight ratios one side is P(VDF-TrFE) 56/44 mol%, 10?m and the other side P(VDF-TrFE) 70/30 mol%, 10?m. These two films glued together using two component glue. Total thickness of the films is 23?mS4: Sample three consists of two P (VDF-TrFE) films with different molar and weight ratios one side is P (VDF-TrFE) 56/44 mol%, 10?m and the other side P(VDF-TrFE) 70/30 mol%, 10?m. These two films glued together using two component glue. Total thickness of the films is 25?mS5: Sample three consists of two P (VDF-TrFE) films with different molar and weight ratios one side is P (VDF-TrFE) 56/44 mol%, 13?m and the other side P(VDF-TrFE) 70/30 mol%, 13?m. These two films glued together using two component glue. Total thickness of the films is 30?mS6: Sample three consists of two P (VDF-TrFE) films with different molar and weight ratios one side is P (VDF-TrFE) 56/44 mol%, 15?m and the other side P (VDF-TrFE) 70/30 mol%, 15?m. These two films glued together using two component glue. Total thickness of the films is 33?m1 Film Maker, comprising top platen, bottom platen and guiding ring1 Cooling ChamberA set of spacer rings as listed below. These are engraved to denote nominal thickness to be produced:-Spacer rings ThicknessA 15?mB 25?mC 50?mD 150?mE 250?mF 500?m1 Pack of 200 AI foil discs1 Stainless steel forceps20 SpecacardsHeated platens with 20° – 300°C temperature Controller 220-240V, 50HzINSTALLATION AND OPERATION1. Connect the cooling system to a cold water supply and drain via the inlet/outlet ports on the rear of the unit.2. Assemble the Specac Heated Platens on the press according to the instructions supplied and set to the required pressing temperature 180degree centigrade.3. Select the spacer ring for the required thickness and locate the ring on the bottom platen of the film maker around the central raised polished surface.4. Place the guiding ring around the spacer.5. Place one aluminium foil disc on the bottom platen of the film maker locating it inside the spacer ring. If a reduction in spectroscopic interference fringes is sought, this disc should be placed matt surface uppermost. Conversely if fringes are required, for example to measure thickness, place the shiny surface uppermost.6. Place the sample to be pressed on the foil disc and locate the top platen of the film maker (polished surface facing down) on top of the sample using the guiding ring for location. The handle of the top platen should be located between the guiding pins on the bottom platen.7. Locate the assembled film maker centrally between the heated platens on the press so that the top platen makes contact with the film maker. Allow approx 5 minutes for the film maker to reach the required temperature. If required a thermocouple may be inserted into a drilled hole in either the top platen or guiding ring. As the sample softens the top bolster of the press may be screwed down further.8. Tighten the locking nut on the press and pump until the required load (4 tons) is reached. Allow the film maker to remain under load for 3-4 minutes then release.9. Transfer the film maker to the cooling unit.10. The film maker may be removed from the cooling unit after 3-5 minutes depending on original temperature and water flow rate. Close the lid of the cooling unit between Operations to allow self-cooling.11. Disassemble the film maker by lifting the top platen. This should come away easily. For emergency use a release lever is provided on the right-hand side of the bottom platen.12. The pressed film will be removed with the top platen together with the foil disc. Use the forceps provided to remove the foil disc and then the sample.13. The sample may be mounted in a Specacard (P/N 3800 or 3810) or a magnetic film holder (P/N 3820) for spectroscopic analysis.NOTES ON TOLERANCEThe spacer rings have manufacturing tolerances such that the sample thickness tolerances are +/- 3?m for rings A and B and +/- 10?m for all other rings. This refers to the absolute thickness produced; once a pressing cycle has been established reproducibility will be greater than this tolerance.Spacer rings A and B are engraved with a series of one to four dots. To achieve the stated tolerance it is essential that the number of dots matches the number engraved adjacent to the polished surface on the bottom platen. If replacement rings or bottom platen are required please specify this number of dots.Both the bottom and top polished surfaces are removable from the platens by releasing the three locating screws in each case. Should it be necessary these surfaces may then be returned to Specac for repolishing. Repolishing of the bottom surface will obviously affect the thickness produced in subsequent pressings but reproducibility will be maintained. 3Aluminium on PVDF film surfaces should be removed because due to small amount of aluminium on surface of PVDF can deviate the polarization resultsWe need three components to remove aluminiumNAOH solution1 beaker1 tweezerHand gloves1. Take NAOH solution and pour it in the beaker till half of the beaker.2. Hold the PVDF film with tweezer and place it in the solution.3. Using tweezer itself stir the solution continuously until 5 minutes4. After 5 minutes aluminium layer on PVDF film gets removed. Now we can use this films for our experimentMake sure NAOH solution is pure.3.3 Electrode deposition:Electrode deposition was done by thermal evaporation of Aluminium. To get the desired shape of the bottom electrodes, a mask was aligned on top of the samples. And To get the desired shape of the top electrodes, a mask was aligned on bottom of the samples. The mask had initially been designed to produce single-layer samples. 4