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Preparation method of plasticized, copolymerized and modified organic glass

A technology of plexiglass and copolymerization modification, which is applied in the field of super-tough and high-transmittance plexiglass, and can solve problems such as easy silver cracks and cracks

Inactive Publication Date: 2013-04-10
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the rigid chain structure of PMMA, it is easy to produce silver streaks and cracks under the action of external stress and low temperature environment. Now the plasticized copolymer modified organic glass can be used to improve the quality of PMMA.

Method used

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  • Preparation method of plasticized, copolymerized and modified organic glass
  • Preparation method of plasticized, copolymerized and modified organic glass
  • Preparation method of plasticized, copolymerized and modified organic glass

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0022] Step 1: Wash and dry two pieces of 120x120x3mm silicon glass, wrap a square rubber strip with tin foil, the size of the internal cavity is 8x8x3mm, stick one side of the rubber strip to a piece of silicon glass with glass glue, and then cover Put another piece of glass on it, clamp it with clips, and set it aside.

[0023] Step 2: Stir and mix 10g of methyl methacrylate (MMA) distilled under reduced pressure and 0.01g of initiator azobisisobutyronitrile (AIBN) with a glass rod, then pour into a clean 100ml round bottom flask , Stir and heat up to 85 ° C, stop heating when the solution becomes viscous, cool to room temperature, that is, prepolymer.

[0024] Step 3: Pour the prepolymer into the mold made in step 1, clamp and seal it, put it in a 50°C oven for slow polymerization for 24 hours, and when the polymer becomes a solid gel, raise the temperature to 100°C and then polymerize for 1~2 hours, so that It is fully polymerized, then gradually cooled to room temperatur...

example 2

[0026] The operation is the same as in Example 1, except that when the monomer methyl methacrylate (MMA) is added in step 2, the comonomer n-butyl acrylate (BA) is added, and the amount of the initiator and other reagents remains unchanged.

example 3

[0028] The operation is the same as in Example 2, except that the plasticizer dioctyl phthalate is added when the monomer methyl methacrylate (MMA) and the comonomer n-butyl acrylate (BA) are added in step 2 (DOP), the amount of initiator and other reagents was unchanged.

[0029] Example 4~8:

[0030] The operation is the same as in Example 3, except that the mass ratios of MMA, BA, iBA, DOP, DIOP and DBP added in step 2 are different, as shown in Table 1.

[0031] The material proportion of table 1 example 1~7

[0032]

[0033] Table 2 Sheet properties

[0034]

[0035] Impact strength from 14.4KJ / m 2 Increased to 27.5KJ / m 2 , increased by 91%, and then added 0.2gDOP, the impact strength increased by 21%; the tensile strength decreased significantly, and the impact strength was less than 30MPa after the DOP was greater than 0.2g; the light transmittance remained at 92%, and the haze increased; Rockwell hardness also decreases with increasing DOP. In short, the ad...

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Abstract

A plasticized, copolymerized and modified organic glass is prepared by copolymerizing methyl methacrylate, comonomer and plasticizer with a main body, and carrying out casting molding. The comonomer used belongs to butyl acrylate type, and includes n-butyl acrylate or n-butyl methacrylate; and the plasticizer belongs to phthalic acid esters, and includes Di-n-octyl phthalate (DOP), Diisooctyl ortho-phthalate (DIOP) and dibutyl phthalate (DBP). The preparation method is used for preparing an organic glass cast sheet with super flexibility and high light transmittance.

Description

technical field [0001] The invention relates to a plasticized and copolymerized modified organic glass, in particular to a super-tough and high-transmittance organic glass formed by bulk polymerization and casting. Background technique [0002] Polymethyl methacrylate (PMMA), commonly known as plexiglass, is a general-purpose plastic with high tensile strength and high light transmittance. Mainly used in lamps, optical glass, instrument panel, advertising window and various medical, military and architectural glass. However, due to the rigid chain structure of PMMA, it is easy to produce silver streaks and cracks under the action of external stress and low temperature environment, which can be improved by using plexiglass modified by plasticized copolymerization. Contents of the invention [0003] The purpose of the present invention is to provide a method for preparing a modified organic glass casting plate with super toughness and high light transmittance. [0004] The...

Claims

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Application Information

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IPC IPC(8): C08L33/12C08K5/12C08F220/14C08F220/18C08F2/02
Inventor 龚方红罗通徐建平刘春林
Owner CHANGZHOU UNIV
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