Isishwankathelo se-ABS kunye ne-PMMA yokuSebenza, iiNgcaciso zokuSebenza kunye neZicelo eziQhelekileyo

ABS

Ukusebenza kwe-ABS

I-ABS yenziwe ngee-monomers ezintathu zeekhemikhali i-acrylonitrile, i-butadiene kunye ne-styrene. Ukususela kumbono we-morphology, i-ABS yinto engekho-crystalline, enegunya eliphezulu lomatshini kunye nokusebenza kakuhle "okunamandla, okuqinileyo, intsimbi" ebanzi. Yipolymer e-amorphous, i-ABS yiplastiki yobunjineli ngokubanzi, iindidi zayo, ukusetyenziswa okubanzi, eyaziwa nangokuthi "iplastiki jikelele", i-ABS ilula ukufunxa ukufuma, ubunzima obuthile yi-1.05g / cm3 (inzima kancinane kunamanzi), i-shrinkage ephantsi. izinga (0.60%), ubungakanani obuzinzileyo, ukusetyenzwa ngokulula kokubumba.

Iimpawu ze-ABS ikakhulu zixhomekeke kumlinganiselo wee-monomers ezintathu kunye nesakhiwo se-molecular yezigaba ezibini. Oku kuvumela ukuguquguquka okukhulu kuyilo lwemveliso, kwaye ngaloo ndlela kuvelisa amakhulu ezinto ezisemgangathweni ezahlukeneyo ze-ABS kwimarike. Ezi zixhobo zomgangatho ohlukeneyo zibonelela ngeempawu ezahlukeneyo, ezifana nokuchasana kwempembelelo ephakathi ukuya phezulu, ephantsi ukuya phezulu kunye neempawu eziphazamisayo zokushisa. Imathiriyeli ye-ABS inobuchwephesha obugqwesileyo, iimpawu zenkangeleko, ukurhubuluza okuphantsi, uzinzo olubalaseleyo lomgangatho kunye namandla empembelelo ephezulu.

I-ABS yintlaka emhlophe etyheli okanye i-bead opaque resin, ayinayo ityhefu, ayinancasa, ifunxa amanzi aphantsi, ineempawu ezintle zomzimba nezomatshini, ezinje ngeempawu ezibalaseleyo zombane, ukuxhathisa ukunxiba, ukuzinza komda, ukunganyangeki kwemichiza kunye neglosi yomphezulu, kwaye kulula ukusetyenzwa ngayo. kunye nefom. Izinto ezingeloncedo kukuxhathisa imozulu, ukumelana nobushushu kubi, kwaye kuyatsha.

Iimpawu zenkqubo ye-ABS

I-ABS ine-hygroscopiness ephezulu kunye novakalelo lokufuma. Kufuneka yomiswe ngokupheleleyo kwaye ifudunyezwe ngaphambi kokuba yenziwe kwaye iqhutywe (yomiswe kwi-80 ~ 90C ubuncinane iiyure ezi-2), kwaye umxholo wokufuma ulawulwa ngaphantsi kwe-0.03%.

I-viscosity enyibilikayo ye-resin ye-ABS ayinabungozi kakhulu kwiqondo lokushisa (ihluke kwezinye iireyini ze-amorphous). Nangona ubushushu benaliti ye-ABS buphezulu kancinane kune-PS, ayinakuba noluhlu olubanzi lokufudumala njengePS. I-viscosity ye-ABS ayinakuncitshiswa ngokufudumeza okungaboniyo. Ubumanzi be-ABS bunokuphuculwa ngokunyusa isantya se-screw okanye uxinzelelo lwenaliti. Ubushushu bokusebenza ngokubanzi kwi-190-235 ℃ ifanelekile.

I-melting viscosity ye-ABS iphakathi, iphezulu kune-PS, i-HIPS kunye ne-AS, kunye noxinzelelo lwe-injection ephezulu (i-500-1000 bar) iyadingeka.

Imathiriyeli ye-ABS enesantya esiphakathi nesiphezulu sokutofa inesiphumo esingcono. (Ngaphandle kokuba imilo inzima kwaye iindawo ezincinci zodonga zifuna izinga eliphezulu lokutofa), imveliso kulula ukuvelisa imigca yegesi emlonyeni.

Iqondo lobushushu lokubumba i-ABS liphezulu, ubushushu bayo bokungunda bulungiswa ngokubanzi kuma-25-70 ℃. Xa uvelisa iimveliso ezinkulu, i-mold esisigxina (umngundo wangaphambili) ubushushu buphezulu kancinane kunobumba obuhambayo (umngundo ongasemva) malunga ne-5 ℃ ifanelekile. (Iqondo lobushushu lokungunda liya kuchaphazela ukugqiba kwamalungu eplastiki, ubushushu obuphantsi bukhokelela ekugqityweni okuphantsi)

I-ABS akufanele ihlale kwi-barrel ephezulu yokushisa ixesha elide (ngaphantsi kwemizuzu engama-30), ngaphandle koko kulula ukubola kunye nephuzi.

Uluhlu lwesicelo oluqhelekileyo

Izemoto (iipaneli zezixhobo, iingcango zokuqandusela izixhobo, izigqubuthelo zamavili, iibhokisi zokubonisa, njl. njl.), izikhenkcezisi, izixhobo ezomeleleyo (izomisi enwele, imixube, iiprosesa zokutya, oomatshini bokucheba ingca, njl.njl.), iikhaseji zemfonomfono, izitshixo zomatshini wokuchwetheza, izithuthi zokuzonwabisa ezinjalo. njengeenqwelo zegalufa kunye nejethi sledges njalo njalo.

PMMA 

Ukusebenza kwe-PMMA

I-PMMA yi-amorphous polymer, eyaziwa ngokuba yiplexiglass. Ukungafihli okugqwesileyo, ukumelana nobushushu obulungileyo (ubushushu be-thermal deformation ye-98℃), eneempawu zokumelana nempembelelo entle, iimveliso zayo zamandla aphakathi koomatshini, ubulukhuni obuphantsi komhlaba, kulula ukukrwela izinto ezilukhuni kwaye zishiye umkhondo, xa kuthelekiswa nePS, akukho lula crack, ubunzima obuthile be-1.18g/cm3. I-PMMA ineepropati ezintle kakhulu kunye nokumelana nemozulu. Ukungena kokukhanya okumhlophe kuphezulu ukuya kuma-92%. Iimveliso ze-PMMA zine-birefringence ephantsi kakhulu, ilungele ngakumbi ukuveliswa kweediski zevidiyo. I-PMMA ineempawu zokunyuka kobushushu begumbi. Ngokunyuka komthwalo kunye nexesha, ukuphazamiseka koxinzelelo kunokubangelwa.

Iimpawu zenkqubo ye-ABS

Iimfuno zokusetyenzwa kwe-PMMA zingqongqo ngakumbi, zinovelwano kakhulu kumanzi kunye nobushushu, ngaphambi kokuba kusetyenzwe ukuze zome ngokupheleleyo (iimeko zokumisa ezicetyiswayo ze-90 ℃, iiyure ezi-2 ukuya kwezi-4), i-viscosity yayo yokunyibilika inkulu, kufuneka yenziwe kwindawo ephezulu (225). -245 ℃) kunye noxinzelelo, ubushushu bokufa kwi-65-80 ℃ bungcono. I-PMMA ayizinzile kakhulu, kwaye ukuthotywa kungabangelwa ukushisa okuphezulu okanye ukuhlala ixesha elide kwiqondo lokushisa eliphezulu. Isantya se-screw akufanele sibe sikhulu kakhulu (i-60% okanye kunjalo), iinxalenye ze-PMMA ezinzima zibonakala zibonakala "i-cavity", kufuneka zithathe isango elikhulu, "ubushushu obuphantsi bezinto eziphathekayo, ubushushu obuphezulu bokufa, isantya esicothayo" ukusetyenzwa kwenaliti.

Uluhlu lwesicelo oluqhelekileyo

Imboni yeemoto (isixhobo sesibane somqondiso, ipaneli yesixhobo kunye nokunye), imboni yamachiza (isitya sokugcina igazi kunye nokunye), ukusetyenziswa kweshishini (i-disc yevidiyo, i-scatterer yokukhanya), iimpahla zabathengi (iikomityi zesiselo, izinto zokubhala njalo njalo).