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One-step melt production method of thermally reversible cross-linked polystyrene

A technology for cross-linking polystyrene and polystyrene, which is applied in the field of one-step melting production of thermally reversible cross-linked polystyrene, can solve problems such as troublesome production methods, and achieve high physical and mechanical properties, good mechanical properties, and heat resistance. Good results

Active Publication Date: 2017-09-19
SHENYANG HUADA R & D CENT OF POLYMER MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Above-mentioned production method is all comparatively troublesome, needs large-scale industrial production

Method used

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  • One-step melt production method of thermally reversible cross-linked polystyrene
  • One-step melt production method of thermally reversible cross-linked polystyrene
  • One-step melt production method of thermally reversible cross-linked polystyrene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] 100 parts by mass of dried HIPS, 1.4 parts of MA and 1 part of DCP were fully mixed in a high mixer, and then the mixture, 0.8 parts of butanediol, 0.6 parts of sodium hydroxide and 2 parts of triethylamine were sequentially added to the bismuth The samples were prepared by extrusion in a screw extruder.

[0036] After the purified sample was parked for 10 hours, it was injected into a sample with an injection molding machine, and then tested.

Embodiment 2

[0040] 100 parts by mass of dried HIPS, 1 part of CTA and 0.2 part of CYHPO were fully mixed in a high mixer, and then the mixture, 0.2 parts of pentylene glycol, 0.6 parts of sodium hydroxide and 2 parts of triethylamine were sequentially added to the bismuth The samples were prepared by extrusion in a screw extruder.

[0041] After the purified sample was parked for 10 hours, it was injected into a sample with an injection molding machine, and then tested.

Embodiment 3

[0043] Fully mix 100 parts by mass of dried HIPS with 20 parts of DMMA and 8 parts of TBHP in a high mixer, and then mix the mixture, 20 parts of tetraethylene glycol, 0.6 parts of sodium hydroxide and 2 parts of triethylamine in sequence Samples were prepared by adding to a twin-screw extruder and extruding.

[0044] After the purified sample was parked for 10 hours, it was injected into a sample with an injection molding machine, and then tested.

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Abstract

The invention relates to a one-step melting production method for thermally reversible crosslinking polystyrene. The production method is characterized in that the thermally reversible crosslinking polystyrene is produced by adding a radical initiator, unsaturated carboxylic acid anhydride and polyol in a twin-screw extruder together with polystyrene, under the catalytic effect of compound alkali; further grafting carboxylic acids on polystyrene by a one-step melting method; and crosslinking by using polyol, wherein the unsaturated carboxylic acid anhydride is used as a grafting agent and polyol is used as a crosslinking agent. The thermally reversible crosslinking polystyrene comprises, by mass, 100 parts of polystyrene, 1-20 parts of unsaturated carboxylic acid anhydride, 0.2-8 parts of the radical initiator and 0.2-20 parts of the polyol. A product has excellent thermally reversible crosslinking property, physical and mechanical performances and relatively high heat stability. A tensile strength of the product reaches over 54 MPa; an elongation at break reaches over 65%; and an impact strength reaches over 0.94 KJ / m<2>. The product is suitable for industries such as packaging containers, daily necessities and electric appliances / electronic industry.

Description

technical field [0001] The invention relates to a one-step melting production method of thermally reversible crosslinked polystyrene. That is, under the catalysis of compound base, with free radical initiator, unsaturated carboxylic acid anhydride as grafting agent and polyol as crosslinking agent, add in the twin-screw extruder together with polystyrene, through one-step melting reaction method ( Extrusion reaction method) After polystyrene is grafted with carboxylic acid, it is cross-linked with polyol to produce thermally reversible cross-linked polystyrene. [0002] This product is especially suitable for packaging containers, daily necessities and electrical / electronic industries. Background technique [0003] Polystyrene (PS) is a thermoplastic resin with excellent thermal insulation, insulation, transparency, low price and easy processing, so it can be widely used in packaging containers, daily necessities and electrical / electronic industries. [0004] The main disa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J3/24C08F285/00C08L51/00C08K5/053
Inventor 陈尔凡
Owner SHENYANG HUADA R & D CENT OF POLYMER MATERIALS CO LTD