CN103804811A - Preparation method of high-melt strength polystyrene - Google Patents
Preparation method of high-melt strength polystyrene Download PDFInfo
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- CN103804811A CN103804811A CN201410056877.2A CN201410056877A CN103804811A CN 103804811 A CN103804811 A CN 103804811A CN 201410056877 A CN201410056877 A CN 201410056877A CN 103804811 A CN103804811 A CN 103804811A
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Abstract
The invention discloses a preparation method of high-melt strength polystyrene, belonging to the technical field of polystyrene. The high-melt strength polystyrene is formed by mixing straight-chain molecules of polystyrene with crosslinked polystyrene molecules, wherein the first component is polystyrene linear polymer aggregate, and the second component is a polystyrene crosslinked polymer; the content of the polystyrene linear polymer aggregate is 62-90% by weight, and the content of the polystyrene crosslinked polymer is 10-38% by weight; in the polystyrene crosslinked polymer, the styrene monomer is dispersively mixed with a crosslinking agent and an initiator in the first component polystyrene linear polymer aggregate, and polymerization and crosslinking are initiated on the surface of the first component polystyrene linear polymer aggregate at certain temperature. The method disclosed by the invention can remarkably improve the melt strength so as to effectively improve the polymer forming process.
Description
Technical field
The present invention relates to a kind of preparation method of high fondant-strength polystyrene, belong to polystyrene technical field.
Background technology
Polystyrene is to be made through mass polymerization by monomer styrene, is the third-largest plastics variety in the world.Polystyrene is colourless, tasteless, odorless, and smooth surface, transparency is high, and water-absorbent is little, and water resisting property is strong, and thermal conductivity and thermal capacity are low.Polystyrene is one most widely used in polymer resin, and because it has above-mentioned advantage, the film of polystyrene, thin slice, porous plastics all have a wide range of applications.
Polystyrene foamed plastics is the rigid foam plate of the continuity closed pore foaming that squeezes out, is a kind of environment protecting thermal insulating material with high resistance to compression, low water absorption, protection against the tide, airtight, light weight, corrosion-resistant, super anti-aging, the excellent properties such as thermal conductivity is low.Therefore be widely used in wall thermal insulating, flat concrete roof and steel construction roof the field such as insulation, cryopreservation ground, parking platform, airfield runway, motorway protection against the tide insulation and control ground frost heave, be to build at present industry relatively more conventional heat insulation, damp proof material.
Easily there are some problems in the foam board that ordinary polystyrene is made, as Air Bubble Size heterogeneity, bubble easily break, expansion ratio is low etc. in the process of machine-shaping.High fondant-strength polystyrene can better keep the gas injecting in foaming process than traditional polystyrene, bubble is difficult for breaking, and is conducive to improve foam performance and solidifying and setting.Higher melt strength can obtain the density lower than ordinary polystyrene sheet material, better mechanical property and over-all properties.Especially for the moulding again of reclaimed materials, cause the melt strength of reclaimed materials significantly to reduce because part is aging, cannot guarantee the quality of item of moulding again.Method technique provided by the invention is simple, can effectively improve the foaming quality of reclaimed materials.
The present invention mixes polystyrene crosslinking polymer and polystyrene thread-like molecule by original position, significantly improve because the introducing of polystyrene crosslinking polymer makes the intensity of polymer melt in the course of processing, increased the mechanical property of polystyrene plastic simultaneously.
Summary of the invention
The invention provides a kind of preparation method that can be widely used in the high fondant-strength polystyrene of manufacturing the structure units such as insulation, protection against the tide, support.
For achieving the above object, high fondant-strength polystyrene of the present invention is that the polystyrene molecular mixing with the straight-chain molecule of polystyrene and after being cross-linked forms, and wherein the first component is polystyrene line polymer pellet; Second component is polystyrene cross-linked polymer, and the wherein said shared content of polystyrene line polymer pellet is 62-90wt%, and the shared content of polystyrene micro-crosslinked polymer is 10-38wt%.Wherein polystyrene micro-crosslinked polymer by styrene monomer and linking agent and initiator dispersing and mixing in the first component granules of polystyrene material, at a certain temperature at the first component granules of polystyrene material surface initiated polymerization and crosslinked.
Wherein temperature of reaction is 50 ℃-100 ℃.
Described polymerization starter is selected from a kind of or its mixture of Diisopropyl azodicarboxylate (AIBN), dibenzoyl peroxide (BPO).The addition of initiator is the 1-5wt% of monomer.
Described linking agent is selected from a kind of or its mixture of dicumyl peroxide (DCP), Vinylstyrene (DVB).The addition of linking agent is the 1-5wt% of styrene monomer and polystyrene total amount.
Its preparation method is that styrene monomer, initiator, linking agent are mixed under room temperature, after shaking up, add in linear polystyrene particulate material, and after stirring rapidly in 50 ℃-100 ℃ in polymerization and crosslinked.
High fondant-strength polystyrene of the present invention is that the polystyrene molecular mixing with the straight-chain molecule of polystyrene and after being cross-linked forms, by mixing and add styrene monomer in granules of polystyrene material, at a certain temperature at the liquid-solid surperficial initiated polymerization of polystyrene pellet and styrene monomer be cross-linked.
Prepared polymkeric substance can be realized the significantly raising of melt strength, thereby effectively improves the moulding process of polymkeric substance, especially has important improvement for the forming process of reclaimed materials, as prepares polystyrene foam sheet.The high fondant-strength polystyrene that the present invention develops can guarantee to have good mechanical property and processing characteristics simultaneously, can be widely used in the field such as building exterior wall heat preserving and wind electricity blade.
Embodiment
High fondant-strength poly styrene polymer of the present invention is that the polystyrene molecular mixing with the straight-chain molecule of polystyrene and after being cross-linked forms, and the first component is polystyrene line polymer; Second component is polystyrene cross-linked polymer, by styrene monomer and linking agent dispersing and mixing in granules of polystyrene material, at a certain temperature at pellet surface initiated polymerization and crosslinked.Wherein, in styrene monomer, to add initiator.
Embodiment 1
By 1.5Kg styrene monomer, 30g Diisopropyl azodicarboxylate (AIBN), 230g Vinylstyrene (DVB) mixes with under room temperature, adds in the linear polystyrene particulate material of 10.0Kg after shaking up, and stir rapidly precursor pulp is added in reactor, react at least 3 hours with at 60 ℃.The gel content of product is 11.7%.
Embodiment 2:
By 2.0Kg styrene monomer, 50g dibenzoyl peroxide (BPO), 360g dicumyl peroxide (DCP) mixes with under room temperature, after shaking up, add in the linear polystyrene particulate material of 10.0Kg, and stir rapidly precursor pulp is added in reactor, react at least 3 hours with at 90 ℃.The gel content of product is 17.2%.
Embodiment 3:
By 1.0Kg styrene monomer, 30g dibenzoyl peroxide (BPO), 440g Vinylstyrene (DVB) mixes with under room temperature, adds in the linear polystyrene particulate material of 10.0Kg after shaking up, and stir rapidly precursor pulp is added in reactor, react at least 3 hours with at 95 ℃.The gel content of product is 9.5%.
Embodiment 4:
By 3.0Kg styrene monomer, 100g Diisopropyl azodicarboxylate (AIBN), 400g dicumyl peroxide (DCP) mixes with under room temperature, after shaking up, add in the linear polystyrene particulate material of 10.0Kg, and stir rapidly precursor pulp is added in reactor, react at least 3 hours with at 70 ℃.The gel content of product is 28.3%.
The melt strength of prepared high fondant-strength polystyrene and ordinary polystyrene be listed in the table below (Rheotens stretching rheometer, capillary diameter 2mm, 190 ℃ of probe temperatures) in each embodiment:
Claims (5)
1. a high fondant-strength polystyrene, it is characterized in that, be with the straight-chain molecule of polystyrene and crosslinked after polystyrene molecular mixing form, wherein the first component is polystyrene line polymer pellet, second component is polystyrene micro-crosslinked polymer, the wherein said shared content of polystyrene line polymer pellet is 62-90wt%, and the shared content of polystyrene micro-crosslinked polymer is 10-38wt%; Wherein polystyrene micro-crosslinked polymer by styrene monomer and linking agent and initiator dispersing and mixing in the first component granules of polystyrene material, at a certain temperature at the first component granules of polystyrene material surface initiated polymerization and crosslinked.
2. a kind of high fondant-strength polystyrene of claim 1, is characterized in that, wherein temperature of reaction is 50 ℃-100 ℃.
3. a kind of high fondant-strength polystyrene of claim 1, is characterized in that, described polymerization starter is selected from a kind of or its mixture of Diisopropyl azodicarboxylate (AIBN), dibenzoyl peroxide (BPO), the 1-5wt% that the addition of initiator is monomer.
4. a kind of high fondant-strength polystyrene of claim 1, it is characterized in that, described linking agent is selected from a kind of or its mixture of dicumyl peroxide (DCP), Vinylstyrene (DVB), and the addition of linking agent is the 1-5wt% of styrene monomer and polystyrene total amount.
5. the method for a kind of high fondant-strength polystyrene of preparation claim 1, it is characterized in that, comprise the following steps: be that styrene monomer, initiator, linking agent are mixed under room temperature, after shaking up, add in linear polystyrene particulate material, and after stirring rapidly in 50 ℃ of-100 ℃ of polymerizations and crosslinked.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410056877.2A CN103804811A (en) | 2014-02-19 | 2014-02-19 | Preparation method of high-melt strength polystyrene |
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| CN201410056877.2A CN103804811A (en) | 2014-02-19 | 2014-02-19 | Preparation method of high-melt strength polystyrene |
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| CN103804811A true CN103804811A (en) | 2014-05-21 |
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| CN201410056877.2A Pending CN103804811A (en) | 2014-02-19 | 2014-02-19 | Preparation method of high-melt strength polystyrene |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114349906A (en) * | 2022-01-13 | 2022-04-15 | 湖南丰立复合材料有限公司 | Super cross-linked polystyrene and preparation method thereof |
Citations (6)
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| CN1336393A (en) * | 1994-10-13 | 2002-02-20 | 陶氏化学公司 | Non-linear styrene polymer compsite, and products made therefrom |
| CN1745129A (en) * | 2003-03-25 | 2006-03-08 | 积水化成品工业株式会社 | Expandable resin beads of styrene-modified straight-chain and low-density polyethylene, process for production thereof, pre-expand beads, and foams |
| CN1839177A (en) * | 2003-08-29 | 2006-09-27 | 积水化成品工业株式会社 | Pre-expanded particle of olefin-modified polystyrene resin, process for producing the same, and molded foam |
| CN1903920A (en) * | 2005-07-29 | 2007-01-31 | 积水化成品工业株式会社 | Foaming polystyrene series resin particle and its manufacturing method, foaming shaped article and foodstuff package |
| CN1903549A (en) * | 2005-07-29 | 2007-01-31 | 积水化成品工业株式会社 | Polystyrene series resin in-mould foaming shaped article and foodstuff package |
| CN102134290A (en) * | 2010-01-22 | 2011-07-27 | 中国石油化工股份有限公司 | Polypropylene with high melt strength and product thereof |
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2014
- 2014-02-19 CN CN201410056877.2A patent/CN103804811A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1336393A (en) * | 1994-10-13 | 2002-02-20 | 陶氏化学公司 | Non-linear styrene polymer compsite, and products made therefrom |
| CN1745129A (en) * | 2003-03-25 | 2006-03-08 | 积水化成品工业株式会社 | Expandable resin beads of styrene-modified straight-chain and low-density polyethylene, process for production thereof, pre-expand beads, and foams |
| CN1839177A (en) * | 2003-08-29 | 2006-09-27 | 积水化成品工业株式会社 | Pre-expanded particle of olefin-modified polystyrene resin, process for producing the same, and molded foam |
| CN1903920A (en) * | 2005-07-29 | 2007-01-31 | 积水化成品工业株式会社 | Foaming polystyrene series resin particle and its manufacturing method, foaming shaped article and foodstuff package |
| CN1903549A (en) * | 2005-07-29 | 2007-01-31 | 积水化成品工业株式会社 | Polystyrene series resin in-mould foaming shaped article and foodstuff package |
| CN102134290A (en) * | 2010-01-22 | 2011-07-27 | 中国石油化工股份有限公司 | Polypropylene with high melt strength and product thereof |
Non-Patent Citations (1)
| Title |
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| 王勇等: "中国挤塑聚苯乙烯泡沫塑料（XPS）行业HCFCs替代技术现状与发展趋势", 《中国塑料》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114349906A (en) * | 2022-01-13 | 2022-04-15 | 湖南丰立复合材料有限公司 | Super cross-linked polystyrene and preparation method thereof |
| CN114349906B (en) * | 2022-01-13 | 2024-03-22 | 湖南丰立复合材料有限公司 | Super-crosslinked polystyrene and preparation method thereof |
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