Novel heat resistant transparent material and its making method

A transparent material and heat-resistant technology, applied in the field of composite materials, can solve the problems of unreported research on transparency, etc., and achieve the effect of convenient source of raw materials, high heat resistance, and low price

Inactive Publication Date: 2005-01-26
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

PMMA / montmorillonite nanocomposites have been reported in a large number of literatures, but these reports mostly use ordinary organic montmorillonite, that is, quaternary ammonium salt, alkylamine salt, comonomer or highly active compound modified montmorillonite, and The research of intercalating modified montmorillonite with initiator and long carbon chain organic cations has not been reported so far; the research on material performance is only limited to the improvement of heat resistance, and the research on transparency has not been reported (see Acta Polymer Sinica, 2002, 2, Zhang Jing, etc.)

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] ●Purification of Na-montmorillonite

[0041] According to the ratio of 1:30 (weight ratio), 150g of Na-montmorillonite was added into 4500ml of deionized water, stirred vigorously at room temperature for 8h, and settled still. The sedimentation part is dried and weighed, and the concentration of the supernatant suspension is calculated to be 2.5wt%;

[0042] ●Preparation of activated organic montmorillonite

[0043]Take 4000ml of the above 2.5wt% montmorillonite suspension, first add 16.27g initiator 2,2'-azodiisobutylamidine hydrochloride AIBA to it, stir vigorously for 2h at room temperature, and then add 32.98g long carbon chain organic cation hexadecyl tri-n-butyl phosphonium bromide HTPB, continue stirring for 8h. After the reaction, the mixture was suction filtered to obtain white precipitate and filtrate. The volume of the filtrate was accurately measured, and part of the filtrate was saved for UV testing. The solid product was repeatedly washed with deionized ...

Embodiment 2

[0049] The operation is the same as in Example 1, except that 32.98g of hexadecyltri-n-butylphosphonium bromide HTPB is replaced by 23.65g long carbon chain organic cation hexadecyltrimethylammonium bromide CTAB to make active organic ammonium bromide. By removing the ANMMT and replacing the original 0.2g active organic montmorillonite APMMT with 0.2g ANMMT, the PMMA / active organic montmorillonite ANMMT nanocomposite can be made.

[0050] The properties of the materials prepared from Examples 1, 2 and Comparative Example 1 are shown in Table 1.

[0051] Properties of PMMA, PMMA / APMMT and PMMA / ANMMT Table 1

[0052] Comparative Example 1 Example 1 Example 2

[0053] Numbering

[0054] PMMA PMMA / APMMT PMMA / ANMMT

[0055] T d5 (°C) 237.3 282.8 268.9

[0056] T d10 (°C) 256.3 327.1 313.6

[0057] Light transmittance (%) 96.1 92.1 91.6

[0058] Note: T d5 and T d10 are the thermal decomposition temperatures when the weight loss is 5wt%...

Embodiment 3～5

[0059] Embodiments 3 to 5: the operation is the same as that of embodiment 1, the difference is that the active organic montmorillonite APMMT in the polymerization formula

[0060] The dosage is different, see Table 2.

[0061] Properties of MMA / APMMT composites with different APMMT dosages Table 2

[0062] No. APMMT dosage (g) T d5 (°C) T d10 ℃) Light transmittance (%)

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Abstract

The invention relates to a polymethyl methacryate or methyl methacrylate-N-cyclohexyl maleimide copolymer / montmorillonite nano composite material and method for preparation, which consists of, inserting initiating agent and long carbon chain organic cation together into the montmorillonite sheets, obtaining novel active organic montmorillonite, finally compounding with polymethyl methacryate or methyl methacrylate-N-cyclohexyl maleimide.

Description

technical field [0001] The invention belongs to composite materials with excellent heat resistance and transparency synthesized by polymer-montmorillonite nanocomposite technology, in particular to polymethyl methacrylate or methyl methacrylate-N-cyclohexylmaleimide Copolymer / montmorillonite nanocomposite material and preparation method thereof. Background technique [0002] The transparent materials widely used at present are mainly inorganic transparent materials and polymethyl methacrylate (PMMA), polycarbonate (PC) organic transparent materials. [0003] PMMA is a general-purpose organic glass with excellent performance and high transparency (light transmittance is above 95%). Compared with inorganic transparent materials (light transmittance is about 88%), it not only has high light transmittance, but also has low density, high mechanical strength and excellent processing performance. Therefore, in recent years, with the rapid growth of the optoelectronics industry, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F2/44C08K3/34C08L33/12
Inventor 王月欣张留成
Owner HEBEI UNIV OF TECH
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