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Melt polymer body photochemical reaction device

A photochemical reaction and melting polymer technology, which is applied in the field of photochemical reaction devices in the molten state of polymers, can solve the problems of low uniformity and low utilization rate of ultraviolet light energy

Inactive Publication Date: 2007-10-24
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this case, the energy utilization rate of ultraviolet light is very low, and, for the polymer matrix, the chemical reaction only occurs in the amorphous region, and the uniformity is very low.

Method used

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  • Melt polymer body photochemical reaction device
  • Melt polymer body photochemical reaction device
  • Melt polymer body photochemical reaction device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1: ultraviolet light triggers molten polypropylene mass grafting maleic anhydride

[0023] Required materials: polypropylene, photosensitizer benzophenone, maleic anhydride

[0024] The temperature settings of the solid conveying section, melt conveying section and metering section of the barrel of the single-screw extruder: 185°C, 195°C, 200°C, heating by cast aluminum heaters, temperature detection by infrared thermometers, cooling methods Adopt forced air cooling.

[0025] 1. After selecting the experimental materials, weigh the dried polypropylene, photosensitizer benzophenone and maleic anhydride. The amount of photosensitizer benzophenone is 0.5% of the amount of polypropylene, and the amount of maleic anhydride is the amount of polypropylene 5% of the mixture, mixed evenly and added to the hopper of the single-screw extruder;

[0026] 2. Preheat the single-screw extruder for 30 minutes according to the temperature set by the single-screw extruder;

...

Embodiment 2

[0029] Embodiment 2: Ultraviolet light triggers molten polyethylene bulk crosslinking reaction

[0030] Required materials: polyethylene, photosensitizer, cross-linking assistant

[0031] The temperature settings of the solid conveying section, melt conveying section and metering section of the barrel of the single-screw extruder: 175°C, 180°C, 190°C, heating by cast aluminum heaters, temperature detection by infrared thermometers, cooling methods Adopt forced air cooling.

[0032] 1. After selecting the experimental materials, weigh the dried polyethylene, photosensitizer benzophenone and cross-linking auxiliary agent. The amount of photosensitizer benzophenone is 0.5% of the amount of polypropylene, and the amount of cross-linking auxiliary agent is 0.3% of propylene consumption, after mixing evenly, join in the single-screw extruder hopper;

[0033] 2. Preheat the single-screw extruder for 30 minutes according to the temperature set by the single-screw extruder;

[0034]...

Embodiment 3

[0036] Example 3: Preparation of Polypropylene with Controllable Rheological Behavior by Degrading Polypropylene by Ultraviolet Light Irradiation

[0037] Required materials: polypropylene (melt index 3), photosensitizer benzoin alkyl ether

[0038] The temperature settings of the solid conveying section, melt conveying section and metering section of the barrel of the single-screw extruder: 185°C, 195°C, 200°C, heating by cast aluminum heaters, temperature detection by infrared thermometers, cooling methods Adopt forced air cooling.

[0039] 1. After selecting the experimental materials, weigh the dried polypropylene and photosensitizer benzoin alkyl ether. The dosage of photosensitizer benzoin alkyl ether is 0.5% of the polypropylene dosage, mix them evenly and add them to the hopper of the single-screw extruder ;

[0040] 2. Preheat the single-screw extruder for 30 minutes according to the temperature set by the single-screw extruder;

[0041] 3. Turn on the ultraviolet ...

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Abstract

The invention relates to a fuse polymer optical chemical reaction device, comprising the single worm extruder and ultraviolet illuminating device, solid transportation part of the single worm extruder being common hopper, transportation and measuring parts of the extruder being transparent quartz glass, ultraviolet device installed outside the transparent hopper with the ultraviolet going through the hopper to reach the fused polymer and triggering its optical chemical reaction, through the drive of the worm to push the renewing of the fuse surface and introduce the optical reaction into the inside of the polymer fuse. It can undergo fuse branching, polymer cross jointing, polymer degradation and so on.

Description

technical field [0001] The invention relates to a device for performing photochemical reactions in a molten state of a polymer, in particular to a special device for crosslinking, grafting, degradation and compatibilization of a polymer in a molten state under the action of ultraviolet light irradiation. Background technique [0002] So far, the chemical reaction of the polymer itself has been initiated by irradiation as the source of initiation, and high-energy irradiation is used, among which gamma-radiation and accelerated electron beams are mostly used as irradiation sources, but these methods are expensive and dangerous. The degree is high, so the use in actual production is limited. As a kind of light with high energy, ultraviolet light is low in cost and can be obtained only by simple ultraviolet light generating equipment; and its penetrating ability is weak, and it can avoid harm to people and the environment under simple protective measures. Good practicality. ...

Claims

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Application Information

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IPC IPC(8): B29C47/00B29C47/66B29C47/82B29C35/08
Inventor 何光建殷小春瞿金平
Owner SOUTH CHINA UNIV OF TECH
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