CN102079868B - Method for preparing liquid crystal nylon alloy - Google Patents
Method for preparing liquid crystal nylon alloy Download PDFInfo
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- CN102079868B CN102079868B CN201010596104A CN201010596104A CN102079868B CN 102079868 B CN102079868 B CN 102079868B CN 201010596104 A CN201010596104 A CN 201010596104A CN 201010596104 A CN201010596104 A CN 201010596104A CN 102079868 B CN102079868 B CN 102079868B
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- liquid crystal
- nylon
- oligopolymer
- nylon alloy
- compatilizer
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Abstract
The invention discloses a method for preparing a liquid crystal nylon alloy. The method comprises the following steps: grinding liquid crystal oligomer and high temperature nylon oligomer, adding in a reactive screw extruder, adding a compatilizer, reacting, performing extrusion, pelletizing and tackifying solid aggregate to ensure that the relative viscosity is 2.0-3.0. By adopting the preparation method in the invention, the dosage of liquid crystals is reduced and the cost is lowered. In addition, as the compatilizer is used in the preparation method, the prepared liquid crystal nylon alloy has good surface compatibility, heat resistance, melt liquidity and processing stability and can not corrode moulds.
Description
Technical field
The present invention relates to a kind of method for preparing the liquid crystal nylon alloy.
Background technology
Liquid crystal is a kind of good engineering plastics, but its production cost is too high, and application is very limited.Semiaromatic polyamide composition is diamines or dicarboxylicacid and the aliphatic dicarboxylic acid or the diamines of band aromatic nucleus, through the prepared polyamide resin of polycondensation, is a kind of in the aromatic polyamide.Owing in the polymeric amide molecular backbone chain, imported aromatic nucleus; Thereby thermotolerance and mechanical property have been improved; Reduced water-intake rate; And more suitable P/C ratio is arranged, and is the high resin of thermotolerance between general engineering plastic nylon and thermostability engineering plastic PEEK, is mainly used in automobile and electric and electronic industry.
Though the semiaromatic polyamide composition temperature tolerance is better, mobile relatively poor in the course of processing, some problems can appear when injection moulding; Discontented phenomenon especially can appear annotating when the injection moulding thin wall parts.
As be prepared into liquid crystal/high-temperature nylon alloy, and both can solve the problem of liquid crystal weld mark strength difference, reduced cost, can improve the flowability of semiaromatic polyamide composition again.
The general general method for preparing the liquid crystal alloy is that liquid crystal and polymkeric substance are joined respectively in the screw extrusion press, and blend is extruded.
Summary of the invention
The objective of the invention is to overcome the deficiency of prior art, the preparation method of the liquid crystal nylon alloy that a kind of cost is low, surface compatability is good is provided.
To achieve these goals, the present invention adopts following technical scheme:
A kind of method for preparing the liquid crystal nylon alloy comprises the steps: earlier liquid crystal oligomer and high-temperature nylon oligopolymer to be pulverized, and joins in the reactive screw extrusion press, adds compatilizer, reacts, and extrudes pelletizing, with the pellet solid-phase tack producing to relative viscosity 2.0-3.0.The fusing point of resulting polymers alloy is between 290-320 ℃.
In above-mentioned preparation method, the preferred heat-drawn wire of said high-temperature nylon oligopolymer is at the nylon more than 280 ℃.Comprise PA10T, PA6T, PA46, PA9T or the like.
In above-mentioned preparation method, said oligomeric reaction product is meant that molecular weight is being no more than the polymkeric substance of 5 nanometers with molecular length below 1500.Molecular weight and molecular length are superpolymer more than above-mentioned scope.The physical and chemical performance of oligopolymer changes with molecular weight is different, is an incomplete polymeric polymkeric substance.
In above-mentioned preparation method, described compatilizer is preferably trimesic acid or its mixture.
In above-mentioned preparation method, the particle diameter of extruding the particle of pelletizing is preferably 2-8mm.
In above-mentioned preparation method, the barrel temperature of said screw extrusion press is between 280-350 ℃.
In above-mentioned preparation method, the equipment of solid-phase tack producing is tackify tower or rotary drum.
Among the present invention, the staple of described liquid crystal oligomer is PHB, Resorcinol.
In above-mentioned preparation method, can add oxidation inhibitor, lubricant, nucleator, fire retardant, tinting material, softening agent or static inhibitor as required; Also can strengthen through adding spun glass, thomel or mineral filler.
Compared with prior art, the present invention has following beneficial effect: preparation method of the present invention has reduced the consumption of liquid crystal, thereby has reduced cost.In addition, preparation method of the present invention is owing to adopt compatilizer, and the liquid crystal nylon alloy surface compatability for preparing is good.Simultaneously, the thermotolerance of gained liquid crystal high-temperature nylon alloy is touched good fluidity with molten, and good processing stability is not corroded mould.
Embodiment
Each item performance test methods of the liquid crystal/high-temperature nylon alloy of the present invention's preparation is following:
Tensile strength, the method for pressing GB-1040-79 is clear fixed.
Flexural strength: the method for pressing GB-1042-79 is measured.
Embodiment 1:
After 8.5kg liquid crystal oligomer and the fragmentation of 1.5kg high-temperature nylon oligopolymer, join in the reactive screw rod, add the 100g trimesic acid, reaction 3h extrudes pelletizing, with pellet solid-phase tack producing 10h, accomplishes reaction.
Embodiment 2:
After 5.0kg liquid crystal oligomer and the fragmentation of 5.0kg high-temperature nylon oligopolymer, join in the reactive screw rod, add the 100g trimesic acid, reaction 3h extrudes pelletizing, with pellet solid-phase tack producing 16h, accomplishes reaction.
Embodiment 3:
After 1.5kg liquid crystal oligomer and the fragmentation of 8.5kg high-temperature nylon oligopolymer, join in the reactive screw rod, add the 100g trimesic acid, reaction 3h extrudes pelletizing, with pellet solid-phase tack producing 12h, accomplishes reaction.
Performance such as the table 1 of embodiment 1-3.
Table 1
| Embodiment | 1 | 2 | 3 |
| The PA10T oligopolymer | 8.5 | 5.0 | 1.5 |
| The TLCP oligopolymer | 1.5 | 5.0 | 8.5 |
| Trimesic acid and compound thereof | 0.1 | 0.1 | 0.1 |
| Tensile strength (Mpa) | 70 | 72 | 75 |
| Flexural strength (Mpa) | 100 | 103 | 105 |
| Helical long (mm) | 900 | 1130 | 1500 |
Visible by table 1, apparent homogeneous, nothing is separated.
Comparative example 1:
8.5kgPA10T and 1.5kgTLCP joined in the screw rod extrude.
Comparative example 2:
5.0kgPA10T and 5.0kgTLCP joined in the screw rod extrude.
Comparative example 3:
1.5kgPA10T and 8.5kgTLCP joined in the screw rod extrude.
The performance of comparative example 1-3 is as shown in table 2.
Table 2
| Comparative example | 1 | 2 | 3 |
| PA10T | 8.5 | 5.0 | 1.5 |
| TLCP | 1.5 | 5.0 | 8.5 |
| Tensile strength (Mpa) | 68 | 70 | 72 |
| Flexural strength (Mpa) | 98 | 100 | 103 |
| Helical long (mm) | 900 | 1130 | 1500 |
Visible by table 2, apparent being separated.
Embodiment 4
Replace with PA6T to PA10T, other are constant.The prepared liquid crystal nylon alloy surface compatability that obtains, thermotolerance and moltenly touch good fluidity, good processing stability is not corroded mould.
Embodiment 5
Replace with PA46 to PA10T, other are constant.The prepared liquid crystal nylon alloy surface compatability that obtains, thermotolerance and moltenly touch good fluidity, good processing stability is not corroded mould.
Embodiment 6
Replace with PA9T to PA10T, other are constant.The prepared liquid crystal nylon alloy surface compatability that obtains, thermotolerance and moltenly touch good fluidity, good processing stability is not corroded mould.
Claims (2)
1. method for preparing the liquid crystal nylon alloy is characterized in that: earlier liquid crystal oligomer and high-temperature nylon oligopolymer are pulverized, are joined in the reactive screw extrusion press, add compatilizer, react, extrude pelletizing, with the pellet solid-phase tack producing to relative viscosity 2.0-3.0.
2. method according to claim 1 is characterized in that: described high-temperature nylon oligopolymer is PA10T, PA6T, PA46, PA9T.
3
.Method according to claim 1 is characterized in that: described compatilizer is trimesic acid or its mixture.
4
.Method according to claim 1 is characterized in that: the particle diameter of extruding the particle of pelletizing is 2-8mm.
5
.Method according to claim 1 is characterized in that: the barrel temperature of screw extrusion press is between 280-350 ℃.
6
.Method according to claim 1 is characterized in that: the equipment of solid-phase tack producing is tackify tower or rotary drum.
7
.Preparing method as claimed in claim 1 is characterized in that: said high-temperature nylon oligopolymer is meant that heat-drawn wire is at the nylon more than 280 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010596104A CN102079868B (en) | 2010-12-20 | 2010-12-20 | Method for preparing liquid crystal nylon alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010596104A CN102079868B (en) | 2010-12-20 | 2010-12-20 | Method for preparing liquid crystal nylon alloy |
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| Publication Number | Publication Date |
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| CN102079868A CN102079868A (en) | 2011-06-01 |
| CN102079868B true CN102079868B (en) | 2012-10-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201010596104A Expired - Fee Related CN102079868B (en) | 2010-12-20 | 2010-12-20 | Method for preparing liquid crystal nylon alloy |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103804901A (en) * | 2012-11-14 | 2014-05-21 | 上海杰事杰新材料(集团)股份有限公司 | Liquid crystal polymer/ semi-aromatic nylon alloy material and preparation method thereof |
| CN104559162B (en) * | 2013-10-28 | 2018-08-24 | 上海杰事杰新材料(集团)股份有限公司 | A kind of aromatic series high temperature resistant nylon/thermotropic liquid crystal composite material and preparation method with electro-magnetic screen function |
| CN108239281A (en) * | 2016-12-27 | 2018-07-03 | 上海杰事杰新材料(集团)股份有限公司 | A kind of branched high-temperature nylon and preparation method thereof |
| CN108264741A (en) * | 2017-12-26 | 2018-07-10 | 上海普利特化工新材料有限公司 | A kind of liquid crystal polyester/nylon composite materials and preparation method thereof |
| CN108276746A (en) * | 2017-12-26 | 2018-07-13 | 上海普利特化工新材料有限公司 | A kind of liquid crystal polyester/nylon alloy material and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5102935A (en) * | 1988-09-13 | 1992-04-07 | Bayer Aktiengesellschaft | Free-flowing polyamide molding compounds and blends |
| CN101817977A (en) * | 2009-09-27 | 2010-09-01 | 深圳市科聚新材料有限公司 | Polyphthalamide composite material and preparation method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04323262A (en) * | 1991-04-24 | 1992-11-12 | Plus Teku Kk | Heat-resistant and electrically conductive resin composition |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5102935A (en) * | 1988-09-13 | 1992-04-07 | Bayer Aktiengesellschaft | Free-flowing polyamide molding compounds and blends |
| CN101817977A (en) * | 2009-09-27 | 2010-09-01 | 深圳市科聚新材料有限公司 | Polyphthalamide composite material and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| JP特开平4-323262A 1992.11.12 |
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