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Method and device for preparing polystyrene thin film

A polystyrene film and preparation device technology, which is applied to flat products, household utensils, and other household utensils, can solve the problems of low pass rate, poor repeatability, and low reliability of the film, so as to prolong the preparation time and reduce thickness deviation , the effect of reducing the volatilization rate

Inactive Publication Date: 2017-05-31
LASER FUSION RES CENT CHINA ACAD OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the repeatability of this process method is poor and the reliability is low, so the qualification rate of the prepared film is low

Method used

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  • Method and device for preparing polystyrene thin film
  • Method and device for preparing polystyrene thin film
  • Method and device for preparing polystyrene thin film

Examples

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preparation example Construction

[0039] Figure 1~2 A preparation device for a polystyrene film is shown, including: a base 1, on which a leveling bolt 8 and a mold placement groove 13 are connected;

[0040] A casting mold for containing polystyrene solution, which includes a casting template 2 arranged in a mold placement groove 13, an L-shaped sealing ring 3 matching the casting template 2, and a detachable connection on the base 1 and sleeved on the casting mold The middle cylinder 4 outside the template 2; the casting template 2 is a circular copper plate with a boss, the diameter of the boss is consistent with the inner diameter of the L-shaped sealing ring, the height of the boss is lower than the height of the L-shaped sealing ring, and the upper edge of the L-shaped sealing ring The height to the upper surface of the boss is the maximum height of the casting liquid level, and the outer diameter of the L-shaped sealing ring is consistent with the diameter of the casting template;

[0041] The upper c...

Embodiment 1

[0049] A method for preparing a polystyrene film using the above-mentioned polystyrene film preparation device, comprising the following steps:

[0050] Step 1, calculate the quality of polystyrene required for preparing the polystyrene film of target thickness according to the inner diameter of L-shaped sealing ring; adopt the following formula to calculate:

[0051] m PS = ρ PS ·π·r 2 ·t×10 -4

[0052] Among them, m PS is the mass of polystyrene g; t theoretical film thickness μm; ρ PS is the density of polystyrene g / cm 3 ; r is the effective radius of the casting template, that is, the inner diameter radius cm of the L-shaped sealing ring;

[0053] Then prepare and filter the polystyrene solution; use an electronic level to test the levelness of the casting template 2, and adjust the leveling bolt 8 on the base to make the casting template 2 reach the level; pour the filtered polystyrene solution into the casting mold template 2, and place the casting mold in an ope...

Embodiment 2

[0058] A method for preparing a polystyrene film using the above-mentioned polystyrene film preparation device, comprising the following steps:

[0059] Step 1, using polystyrene with a weight-average molecular weight of 250,000 as the raw material for film preparation; calculating the mass of polystyrene required for a film with a target thickness of 10um to be 0.1394g according to the inner diameter of the L-shaped sealing ring being 6.5cm;

[0060] Add 0.1394g of polystyrene and 15mL of chloroform into the reagent bottle, put a stirring bar in the reagent bottle, cover the seal cap, turn on the magnetic stirrer, the room temperature is 25°C, the stirring speed is 50rpm, and the time is 0.5h, obtain polystyrene solution; Adopt the needle filter that diameter is 25mm and PTFE filter membrane aperture is 0.22 micron to filter polystyrene solution;

[0061] Combine the casting formwork 2, L-shaped sealing ring 3, middle cylinder 4 and base 1 through bolts to form a casting mold...

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Abstract

The invention discloses a method and device for preparing a polystyrene thin film. According to the method, the volatilization rate of solvent is decreased through the mode of controlling the discharging speed of solvent vapor, and the corrugated degree of the surface of the thin film due to the 'skinning' effect is lowered. Meanwhile, a solvent vapor fumigation levelling technology of high-viscosity fluid is adopted, and thus preparation time cannot be excessively prolonged. A high-viscosity fluid body is weak in mobility, and the surface layer of the high-viscosity fluid body can be re-dissolved under the fumigation action of the solvent vapor, so that the viscosity is lowered, the mobility is slightly enhanced and short-range migration can happen. By means of long-term dynamic rebalancing, surface quality of the thin film can be improved. By the adoption of a heat treatment clamp which is designed and processed in a matched mode, the heat treatment effect is improved, and the surface quality of the thin film is further improved. By the aid of the method, thickness uniformity of the thin film is effectively improved, and thickness deviation is reduced. The polystyrene thin film with the thickness being 10-100 microns, the thickness uniformity reaching 80% or above and the thickness deviation being smaller than + / -20% is successfully prepared through the method.

Description

technical field [0001] The invention belongs to the field of polymer processing and molding, and in particular relates to a method and a device for preparing a polystyrene film. Background technique [0002] In the laser inertial confinement fusion (ICF) research, polystyrene films are commonly used to prepare various types of targets. In strong field physics experiments, polystyrene films are often used to study the interaction between laser light and materials. In addition to the flat polystyrene film target with simple structure, there are also some targets with more complex design structures, such as modulation targets with two-dimensional or three-dimensional sinusoidal modulation patterns on the surface of polystyrene targets, polystyrene film - Foam modulated composite targets, etc. The preparation of these targets is based on the preparation of polystyrene films. The polystyrene film prepared by the casting method is one of the most commonly used polymer films in I...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C39/02B29C39/44B29C71/02B29K25/00B29L7/00
CPCB29C39/02B29C39/44B29C71/02B29K2025/06B29L2007/00
Inventor 王宇光朱方华张超徐嘉靖张伟尹强张帅李娃
Owner LASER FUSION RES CENT CHINA ACAD OF ENG PHYSICS
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