CN100408626C - Processing method of polystyrene at 10 to 60 deg.C - Google Patents
Processing method of polystyrene at 10 to 60 deg.C Download PDFInfo
- Publication number
- CN100408626C CN100408626C CNB2006100883880A CN200610088388A CN100408626C CN 100408626 C CN100408626 C CN 100408626C CN B2006100883880 A CNB2006100883880 A CN B2006100883880A CN 200610088388 A CN200610088388 A CN 200610088388A CN 100408626 C CN100408626 C CN 100408626C
- Authority
- CN
- China
- Prior art keywords
- polystyrene
- mother material
- working method
- disentanglement
- scope
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Abstract
The present invention relates to a method for processing polystyrene in the range of 10 deg.C-60 deg.C. Said method includes the following steps: making polystyrene be dissolved in tetrahydrofuran or di (2-ethylhexyl)-O-phthalate, stirring them to make solution be homogeneous transparent, then pouring said homogeneous solution into ethyl alcohol or methyl alcohol to make precipitation, and using ethyl alcohol or methyl alcohol to wash precipitate, drying so as to obtain the powdered disentanglement polystyrene mother material, applying one-way 5-300 MPa pressure to said mother material in the range of 10 deg.C-60 deg.C for 1min-1h, so that the physical mechanical property of the obtained product is identical to that of product made up by using conventional heat-processing method.
Description
One, technical field:
The present invention relates to the preparation of polystyrene part disentanglement masterbatch and in 10 ℃ to 60 ℃ scope working method, belong to polystyrene technology field.
Two, background technology:
Polystyrene is a kind of high comprehensive performance, broad-spectrum resins for universal use.It is good that polystyrene has the transparency, and outstanding feature such as electrical insulating property is good can be processed by modes such as mold pressing, laminated, injection moulding, extrusion moldings.But because polystyrene resin is a typical brittleness material, goods easily form the crack through external force, thereby its application in some aspects is restricted.
Polystyrene is in process of injection molding, and along with the rising of melt temperature, the molecule segment generation thermal destruction of superpolymer causes the physical strength of material to descend.Generally can improve injection pressure, reduce melt viscosity, improve the flowability of melt.But along with the pressure in the die cavity increases, the velocity of flow of melt in die cavity increases, and makes the directive action of polymer segment on flow direction increase.Goods increase in the intensity on the molecular orientation direction, and stress cracking easily takes place in vertical direction.Simultaneously owing to need refrigerated product in the polystyrene hot procedure, and production firm tends to shorten cooling time in order to improve output, makes that the naturally cooling after the goods demoulding can produce bigger contraction and depression, cause structure difference in the goods table, in use easily ftracture.
{ reference [1] Jin Zhong nephelinization technology and application, 2000, Vol.8,, pp.74[2] and the long rain engineering plastics application in Shen, 1999, Vol.27, No.5, pp.32[3] application Beijing Chemical Industry Press 1986 of Jin Riguang superpolymer rheology and work in-process thereof, pp.546-554[4] Wu Linbo, Li Baigeng, Li Baofang polymer chemistry 2001, No.5, pp.633-638[5] high wise, Li Changxiu, Wang Jun etc. translate modern styrenic Beijing 2004} of Chemical Industry Press
Three, summary of the invention
The objective of the invention is: the preparation polystyrene mother material is also processed in 10 ℃ to 60 ℃ scope, solves the labile technical barrier of polystyrene in the existing polystyrene working method.
The object of the present invention is achieved like this:
Be dissolved in polystyrene in the good solvents such as tetrahydrofuran (THF) or phthalic acid two (the 2-ethyl is own) ester by 1-50wt%, fully stir, be dissolved to the homogeneous system, then uniform solution is poured in ethanol or the methyl alcohol and be settled out polystyrene, again with ethanol or methanol wash, drying, obtain the polystyrene mother material of Powdered part disentanglement, the polystyrene mother material of these part disentanglements added in the mould uniformly pave, mould is placed on pressing machine or the compression molding instrument, in 10 ℃ to 60 ℃ scope, applies the pressure of 5-300MPa.And pressure was kept 1 minute to 1 hour.During withstanding pressure, the molecular chain of polystyrene has slippage by a relatively large margin, promptly shows the certain fluidity energy.Can obtain after release, the demoulding and modified styrene polymer that conventional hot-work sample has the same physical mechanical property.Following table is the performance synopsis of the modified styrene polymer (weight-average molecular weight is 234,000, and molecular weight distribution is 2.4) that makes of this working method and conventional working method.
The modified styrene polymer performance synopsis that this working method and conventional working method make
| The modified styrene polymer that this working method makes | The modified styrene polymer that conventional working method makes | |
| The transparency | Clear, colorless | Clear, colorless |
| Young's modulus A(Pa) | 1.8×10 9 | 1.8×1.8×10 9 |
| Whether degrade | Not | Be |
A tests from DMTA
The advantage of working method of the present invention is:
1. less energy intensive in the moulding process: present method can adopt lower processing temperature (10 ℃ to 60 ℃ scopes) on existing processing units, makes less energy intensive in the moulding process
2. need not to add processing aid: because there is not thermal degradation problems in present method processing polystyrene, can not add processing aids such as oxidation inhibitor in the polystyrene mother material, reduce of the pollution of auxiliary agent such as oxidation inhibitor in the goods to environment.
3. handle easy and simple to handle: the solvent that present method is used is industrialized Chemicals, and can recycle, and treatment process is simple, and its corresponding process cost is lower.
4. has the same physical mechanical property with conventional hot-work goods: adopt the modified styrene polymer of present method preparation and the goods of conventional thermal processing method preparation to have identical physical and mechanical properties.
Purposes of the present invention: the complete processing of p-poly-phenyl ethene is reformed on the method, and the Powdered part disentanglement polystyrene mother material that obtains behind dissolution precipitation is 10 ℃ to 60 ℃ scope processing.This working method has been avoided polystyrene thermal degradation problems in the conventional course of processing, reduced the energy consumption in the production process, product has good physical and mechanical properties, reduced in the production process simultaneously and the environmental pollution of goods itself, can be applicable to the large-scale industrial production of polystyrene and styrene series resin (as high-impact polystyrene HIPS, acrylonitrile-butadiene-styrene copolymer ABS, MBS MBS, engineering resins such as acrylonitritrile-styrene resin AS), polystyrene blend.
Four, embodiment:
Example 1, monodisperse polystyrene are 10 ℃ of processing:
Monodisperse polystyrene (weight-average molecular weight is 223,000, molecular weight distribution 1.03) 100 grams are joined in 200 gram tetrahydrofuran (THF) (THF) solvents, and the concentration of solution is 50wt%, is transparent and homogeneous in normal-temperature dissolution, the system of being stirred to.The solution of homogeneous poured in ethanol or the methyl alcohol be settled out polystyrene, and, be drying to obtain Powdered part disentanglement polystyrene mother material with ethanol or methanol wash.Will this Powdered part disentanglement polystyrene mother material add in mould tiling evenly, be placed on mould on the conventional press or apply the pressure 10 minutes of 250MPa on the compression molding instrument under the normal temperature, can obtain transparent sample fully.Sample is tested through DMTA, finds to have identical Young's modulus (1.8 * 10 with the sample of conventional thermal processing method preparation
9Pa).
Example 2, polystyrene are 60 ℃ of processing:
(molecular weight is 234,000, technical grade polydispersion sample with polystyrene, molecular weight distribution is 2.4) 100 the gram join 10, in 000 gram phthalic acid two (the 2-ethyl the is own) ester solvent, the concentration of solution is 1wt%, is transparent and homogeneous 80 ℃ of dissolvings, the systems of being stirred to.The solution of homogeneous poured in ethanol or the methyl alcohol be settled out polystyrene, and with ethanol or methanol wash, drying promptly obtains Powdered part disentanglement polystyrene mother material.Will this Powdered part disentanglement polystyrene mother material add in mould tiling evenly, be placed on mould on the conventional press or 60 ℃ of pressure that applies 250MPa 1 minute on the compression molding instrument, can obtain transparent sample fully.Sample is tested through DMTA, finds to have identical Young's modulus (1.8 * 10 with the sample of conventional thermal processing method preparation
9Pa).
Claims (2)
1. the working method of polystyrene in 10 ℃ to 60 ℃ scope, it is characterized in that: polystyrene is dissolved in tetrahydrofuran (THF) or phthalic acid two (the 2-ethyl the is own) ester, be stirred to the solution transparent and homogeneous, uniform solution poured in ethanol or the methyl alcohol precipitate, and with ethanol or methanol wash, obtain Powdered part disentanglement polystyrene mother material after the drying, the polystyrene mother material of disentanglement is tiled in the mould, unidirectionally on 10 ℃ to 60 ℃ scope intrinsic pressure machines or compression molding instrument apply 5-300MPa pressure 1 minute-1 hour, obtain clear sheet.
2. according to the working method of the described polystyrene of claim 1 in 10 ℃ to 60 ℃ scope, its feature is that also the weight percent of polystyrene and tetrahydrofuran (THF) or phthalic acid two (the 2-ethyl is own) ester is 1-50%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100883880A CN100408626C (en) | 2006-07-17 | 2006-07-17 | Processing method of polystyrene at 10 to 60 deg.C |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100883880A CN100408626C (en) | 2006-07-17 | 2006-07-17 | Processing method of polystyrene at 10 to 60 deg.C |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1903928A CN1903928A (en) | 2007-01-31 |
| CN100408626C true CN100408626C (en) | 2008-08-06 |
Family
ID=37673302
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100883880A Expired - Fee Related CN100408626C (en) | 2006-07-17 | 2006-07-17 | Processing method of polystyrene at 10 to 60 deg.C |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100408626C (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6599996B1 (en) * | 1999-12-09 | 2003-07-29 | Basf Aktiengesellschaft | Method for (CO)polymerizing polar and non-polar monomers |
| US20040234810A1 (en) * | 1999-12-20 | 2004-11-25 | Shuji Doi | Polymeric fluorescent material, process for producing the same, and polymeric luminiscent element |
| CN1569956A (en) * | 2004-04-23 | 2005-01-26 | 中国科学院长春应用化学研究所 | Nano structural material model making method |
-
2006
- 2006-07-17 CN CNB2006100883880A patent/CN100408626C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6599996B1 (en) * | 1999-12-09 | 2003-07-29 | Basf Aktiengesellschaft | Method for (CO)polymerizing polar and non-polar monomers |
| US20040234810A1 (en) * | 1999-12-20 | 2004-11-25 | Shuji Doi | Polymeric fluorescent material, process for producing the same, and polymeric luminiscent element |
| CN1569956A (en) * | 2004-04-23 | 2005-01-26 | 中国科学院长春应用化学研究所 | Nano structural material model making method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1903928A (en) | 2007-01-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| TWI686409B (en) | Fine cellulose fiber composite | |
| TW201920295A (en) | Micro cellulose fiber complex | |
| CN101704969B (en) | Wood plastic composite for injection and preparation method and application thereof | |
| KR20120108798A (en) | Manufacturing method of polylactic acid composites composition | |
| CN106188842B (en) | Polypropylene/bamboo particle/ultra micro bamboo charcoal composite material preparation method | |
| CN104761794B (en) | A kind of gutta-percha shape memory macromolecule composite material and preparation method thereof | |
| He et al. | Structure and performance of Poly (vinyl alcohol)/wood powder composite prepared by thermal processing and solid state shear milling technology | |
| CN109265941B (en) | Semitransparent heat-resistant polylactic acid composite material and preparation method thereof | |
| CN105131542B (en) | A kind of bamboo powder handled through lactide surface grafting and polylactic acid blend composite and preparation method and application | |
| CN100408626C (en) | Processing method of polystyrene at 10 to 60 deg.C | |
| CN111607187B (en) | Modified ABS material and preparation method thereof | |
| CN110437580B (en) | Bio-based core-shell particle toughened polymer composite material and preparation method thereof | |
| CN113861680B (en) | Preparation method of degradable and toughened polybenzoxazine | |
| KR20210087488A (en) | Polycarbonate alloy and its manufacturing method | |
| CN107759990B (en) | Full-bio-based polylactic acid composite material and preparation method thereof | |
| CN111234471A (en) | PBT composite material with low linear thermal expansion coefficient and preparation method thereof | |
| CN100410322C (en) | Method for processing polylactic acid at 10-60deg.C range | |
| CN112661911B (en) | Multi-monomer grafted polylactic acid compatilizer and preparation method and application thereof | |
| CN112430384B (en) | Preparation process of bio-based degradable renewable energy polymeric plastic particles | |
| CN109988263B (en) | Anhydride polymer chain extender and preparation method thereof | |
| CN114045042A (en) | Bamboo-plastic composite material for container bottom plate and preparation method thereof | |
| CN107698714B (en) | Itaconic anhydride grafted polylactic acid copolymer and preparation method and application thereof | |
| CN100425426C (en) | Processing method for partially untangled polyningl chloride master batch at 10-120deg.c range | |
| CN112745624B (en) | ACS/PET-based alloy with short molding period and preparation method and application thereof | |
| CN103102565B (en) | Coated quartz sand modified low-density polyethylene expanded material of a kind of CPE and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080806 |