Acrylonitrile-butadiene-styrene copolymer (ABS) ine yakanakisa magetsi emagetsi, kutonhora kupikisa, mafuta kuramba, kugadzikana kwekemikari, uye maitiro ekukanganisa, uye inoshandiswa zvakanyanya muminda ye electromechanics, midziyo yemumba uye yekufambisa.Nekudaro, iyo oxygen index yeABS inongova 18%, uye inogona kuramba ichipisa mushure memoto, iyo inomisa zvigadzirwa zvayo muminda yakawanda yekushandisa.Kuti uwane iyo inodzoreredza murazvo weABS kusvika UL94 V-0, huwandu hwemoto unodzoreredza hunowedzera huzhinji.Iyo mechanical properties yezvinyorwa inoderedzwa, uye mari yacho yakakwirira.
Acrylonitrile-butadiene-styrene copolymer (ABS) ine yakanakisa magetsi emagetsi, kutonhora kupikisa, mafuta kuramba, kugadzikana kwekemikari, uye maitiro ekukanganisa, uye inoshandiswa zvakanyanya muminda ye electromechanics, midziyo yemumba uye yekufambisa.Nekudaro, iyo oxygen index yeABS inongova 18%, uye inogona kuramba ichipisa mushure memoto, iyo inomisa zvigadzirwa zvayo muminda yakawanda yekushandisa.Kuti uwane iyo inodzoreredza murazvo weABS kusvika UL94 V-0, huwandu hwemoto unodzoreredza hunowedzera huzhinji.Iyo mechanical properties yezvinyorwa inoderedzwa, uye mari yacho yakakwirira.
Polytetrafluoroethylene (PTFE) ine yakanaka anti-dropping effect uye yakashandiswa zvakanyanya muflame retardant PC/ABS nezvimwe zvinhu, asi kune mishumo mishoma yekutsvagisa nezvePTFE muflame retardant ABS.Iyo yakajairika ABS flame retardant muindasitiri, tichiunza PTFE, yakakurukura nezve PTFE pakuita kweflame retardant ABS.
1. Chikamu chekuedza
1.1.Main mbishi zvinhu
ABS, brominated triazine, antimony trioxide, PTFE, antioxidants, lubricant, nezvimwe.
1.2.Main midziyo
Twin-screw extruder: SHJ-35 rudzi;jekiseni kuumba muchina: T80 mhando;komputa-inodzorwa yemagetsi universal test muchina: CM6104 mhando;thermal deformation tembiricha yekuyera mudziyo: 303;thermogravimetric (TG) analyzer: 209C mhando.Pendulum impact tester: Muenzaniso ZBC-25B;Melt flow rate (MFR) chiridzwa: MPXRZ-40A;Yakachinjika uye yakatwasuka combustion tester: Model HVR-2.
1.3.Kugadzirira kwemuenzaniso
Dry ABS pa80 ℃ kwemaawa matatu kusvika mashanu, wobva wasanganisa ABS, brominated triazine, antimony trioxide, PTFE, uye zvimwe zvinowedzera zvakafanana, nyungudusa uye sanganisa kuburikidza ne-twin-screw extruder ye extrusion uye granulation.Extrusion tembiricha ndeye 215-225 ℃, screw speed i360 r/min;yobva yapeperetswa nekuomeswa pa80℃ kwemaawa maviri, yobva yaiswa muyedzo sampuli, tembiricha yejekiseni i200～210℃.
1.4.Performance test
Kupisa kushanda: kuedzwa maererano neUL94;tensile performance: yakaedzwa maererano neGB/T 1040-1992;kukotama simba: akaedzwa maererano GB/T 9341-2000;kusimba kwesimba re cantilever notch: yakaedzwa zvinoenderana neGB/T 1843-1996;MFR: maererano neGB/T 3682-==2000 bvunzo, tembiricha 220 ℃, mutoro 220kg;kupisa kunokanganisa tembiricha: bvunzo zvinoenderana neGB/T 16341-2004;TG kuongororwa: kupisa kwehuwandu 10. C / min,.Tembiricha yemhando ndeye 30 ~ 700 ℃, pasi penitrogen atmosphere.
2. Migumisiro uye nhaurirano
2.1.Sample isina murazvo wemoto unopisa zvachose mushure mekutanga kubatidza, uye murazvo unodzoreredza mhedzisiro hauna kunaka.Kana imwe chiyero chebrominated triazine uye antimony trioxide flame retardant yawedzerwa, murazvo unodzoreredza murazvo unovandudzwa zviri pachena, uye mwero wekudzoreredza murazvo unosvika pachiyero cheUL94V-2, asi nguva yekupisa yakareba, uye murazvo unodzoreredza moto hausati wavapo. ideal.Kuwedzerwa kwePTFE kunopfupisa zvakanyanya nguva yekutsva kwezvinhu.Kana 0.2% PTFE yawedzerwa, murazvo unodzoreredza mwero wezvinhu unowedzerwa kubva kuV-2 kuenda kuV-0.Izvi ndezvokuti PTFE ine nzvimbo yakanyanyisa yakanyunguduka (323 ° C), uye hainyunguduki pakupisa kwekugadzirisa zvinhu, asi zviri nyore kuti fibrillate iite fiber network pasi pekubatanidza shear force, iyo inoderedza kupararira kwemurazvo.
2.2.Mushure mekuwedzera iyo inodzoreredza murazvo, iyo nottched simba rekuita rechinhu chinodonha zvakanyanya, nepo mamwe ma mechanic properties anochinja zvishoma.Kusiyana neizvi, kana zvidziviriro zvemoto uye PTFE zvinowedzerwa panguva imwe chete, kuoma kwezvinhu kunovandudzwa zvishomanana kana kuenzaniswa nekushandiswa kwezvinopisa moto chete, uye sezvo huwandu hwePTFE huchiwedzera, iyo notched effect simba rezvinyorwa zvinowedzerawo, iyo inogona kunge iri Iyo fiber network dhizaini inoumbwa nePTFE mune zvinyorwa inoita basa rekusimbisa kune imwe nhanho.
2.3.Sezvo huwandu hwePTFE hunowedzera, iyo MFR yezvinhu zvishoma nezvishoma inoderera.Kana huwandu hwePTFE hwakawedzerwa huri 0.3%, iyo MFR yemurazvo wemoto ABS inoderera kubva ku23.1g/10min kusvika 14.5g/10min, zvichiratidza mhedzisiro yePTFE pakuyerera kwezvinhu.Iyo hombe inonyanya kukonzerwa nekuvapo kwePTFE fiber-forming material, iyo inotadzisa kufamba kwemamorekuru eABS.Nekuda kwechimiro chakakosha chakaumbwa nePTFE panguva yekugadziriswa, iyo mitsetse yemidziyo inoita senge ichizvimba pakubuda kweiyo tambo, zvichikonzera mitsetse yemidziyo yakakora uye inononoka pelletizing.Kuwedzerwa kwezvinhu pasina PTFE kwakajairika.
2.4.TG uye DTG kuongororwa kwezvinhu
Pane imwe chete yepamusoro yekupisa uremu mukurasikirwa kwehuremu hweABS yakachena, uye nhongonya mbiri dzekudzikira uremu dzinoonekwa mukuita kwekudziya kwehuremu hwehuremu retardant ABS.Peak yekutanga inokonzerwa nekuparara kwemurazvo wemoto, uye yechipiri peak inokonzerwa nekuparara kweABS.Nekuwedzera kwePTFE, iyo peak thermal weight loss tembiricha (427 ° C) yeABS ndeye 1.8 ° C yakakwirira kupfuura iyo yakachena ABS (428.8 ° C), asi iyo yepamusoro yakasiyana-siyana yekupisa uremu hwekureruka (huwandu hwekurasikirwa kwehuremu) ( 11.7%/min) ingori Peak differential thermal weight loss rate ye pure ABS (18.8%/min) iri 62.2%, iri 7.9% yakaderera pane peak differential thermal weight loss rate (12.7%/min) yemuenzaniso 28 pasina PTFE yakawedzerwa.Kuwedzerwa kwePTFE kunogona kuvandudza murazvo unodzora kuita kwezvinhu.
Bromotriazine uye antimony trioxide ndiyo inowanzoita halogen-antimony flame retardants, iyo isingangoshandure gasi chikamu chemoto inodzoreredza maitiro asiwo inoshandura kusvibiswa kwekushisa kwechikamu chakaderedzwa.Iyo yasara kabhoni mwero we pure ABS pa 700 ℃ i 1.2%, uye flame retardant ABS ine brominated triazine uye antimony trioxide inowedzerwa.Iyo yakasara kabhoni rate pa700 ℃ ndeye 3.5%.Kuumbwa kwekabhoni layer kunobatsirawo kuwedzera kushorwa kwezvinhu.Ignitability.Panguva imwecheteyo, iyo yakasara kabhoni rate pa700 ° C nePTFE yakawedzera yaive 3.6%, zvichiratidza kuti PTFE yakatadza kukurudzira kuumbwa kwekabhoni.Kuwedzerwa kwePTFE kunogona kukurudzira denser carbon layer structure uye zviri nani kudzivirira uye oksijeni zvipingamupinyi, saka Inoshandiswa ne halogen-antimony flame retardant, iyo flame retardant effect inonyanya kunaka.
3. Mhedziso
3.1.Kuwedzerwa kwePTFE kunogona kuwedzera kudzikisa huwandu hwepamusoro hwehuremu hwehuremu hweiyo murazvo unodzoreredza ABS, zvakanyanya kuderedza nguva yekutsva kwezvinhu, uye kugadzirisa murazvo wegiredhi rezvinhu.
3.2.Kuwedzerwa kwePTFE hakuna mhedzisiro pamichina yemagetsi inodzosa moto ABS, uye kune imwe nhanho inovandudza kuoma kwezvinhu.
3.3.PTFE ine mhedzisiro yakakosha pakugadzirisa mashandiro emurazvo retardant ABS zvinhu, uye muyero unofanirwa kugadziridzwa zvinoenderana nezvinodiwa panguva yekushandiswa.
Nguva yekutumira: Jun-11-2020