Kwinkqubo yokwenza izinto zeplastiki zeplastiki, enye okanye ngaphezulu kwezi meko zilandelayo zihlala zisenzeka, njenge-rheology yeepolymers kunye notshintsho kwiipropati zomzimba kunye neekhemikhali, ezidla ngokubonakala ngezi mpawu zilandelayo:
1. I-Fluidity: I-fluidity ye-thermoplastics inokumiselwa ngokubanzi kuluhlu lwezalathisi ezifana ne-molecular weight, i-melt index, i-Archimedes spiral flow length, i-viscosity ebonakalayo kunye ne-flow ratio (ubude benkqubo / ubukhulu bodonga lweplastiki).hlalutya.
2. I-Crystallinity: Into ebizwa ngokuba yi-crystallization phenomenon ibhekisela kwinto yokuba iimolekyuli zeplastiki zitshintsha ukusuka kwintshukumo ekhululekile kwaye ziphazamisekile ngokupheleleyo kwiimolekyuli ziyeke ukuhamba ngokukhululekileyo kwaye zicwangciswe kwindawo ehleliweyo kancinane ukuze zenze imodeli yokubonisa imolekyuli ukusuka kwityhidiweyo. chaza ukujiya.
3. Ubuzaza bobushushu: Ubuzaza bobushushu buthetha ukuba ezinye iiplastiki zinobuzaza ngakumbi kubushushu.Xa ixesha lokufudumala lide kwiqondo lokushisa eliphezulu okanye umphumo wokucheba mkhulu, ubushushu bezinto eziphathekayo buyanda kwaye buxhomekeke ekukhanyeni kunye nokubola.Xa iiplastiki ezingeva bubushushu zibola, kuveliswa izinto ezifana neemonomers, iigesi, kunye nezinto eziqinileyo.Ngokukodwa, ezinye iigesi ezibolileyo ziyacaphukisa, ziyonakalisa okanye zinetyhefu emzimbeni womntu, izixhobo kunye nokungunda.
4. I-hydrolysis elula: Nokuba ezinye iiplastiki ziqulethe amanzi amancinci kuphela, ziya kubola phantsi kobushushu obuphezulu, uxinzelelo oluphezulu, kwaye le propati ibizwa ngokuba yi-hydrolysis elula.Ezi plastiki (ezifana ne-polycarbonate) kufuneka zifudunyezwe kwaye zomiswe
5. Ukuqhekeka koxinzelelo: Ezinye iiplastiki zinovelwano kuxinzelelo, kwaye zixhomekeke kuxinzelelo lwangaphakathi ngexesha lokubumba, eliqhekezayo kwaye lilula ukukrazula, okanye iindawo zeplastiki ziqhekeza phantsi kwesenzo samandla angaphandle okanye i-solvent.Le nto ibizwa ngokuba yi-stress cracking.
6. Nyibilika ukwaphuka: Ipolima enyibilikayo enesantya esithile sokuqukuqela idlula kumngxuma wombhobho kwiqondo lobushushu elingaguqukiyo.Xa izinga lokuhamba lidlula ixabiso elithile, iintanda ezicacileyo ezinqamlezileyo zenzeka kwindawo enyibilikayo, ebizwa ngokuba yi- melt fracture.Xa iqondo lokunyibilika likhethwa Xa uvelisa umgangatho ophezulu wezinto ezikrwada zeplastiki, imilomo, iimbaleki, kunye namazibuko esondlo kufuneka zandiswe ukunciphisa isantya sokutofa kunye noxinzelelo, kunye nokunyusa ubushushu besixhobo.
Iimbekiselo
[1] Zhong Shuheng.Ukuqulunqwa kombala.EBeijing: Indlu yaseTshayina yokuPapasha ubuGcisa, ngo-1994.
[2] Ingoma Zhuoyi et al.Izinto zePlastiki ekrwada kunye nezongezo.EBeijing: INdlu yoPapasho lweNzululwazi kunye neTekhnoloji, ngo-2006.
[3] Wu Lifeng et al.Masterbatch Incwadi Yomsebenzisi.I-Beijing: I-Chemical Industry Press, ngo-2011.
[4] Yu Wenjie et al.Izongezo zePlastiki kunye neTekhnoloji yoYilo loYilo.Uhlelo lwesi-3.I-Beijing: I-Chemical Industry Press, ngo-2010.
[5] Wu Lifeng.Uyilo lwePlastiki yokuYilwa koMbala.Ushicilelo lwesi-2.I-Beijing: I-Chemical Industry Press, ngo-2009
Ixesha lokuposa: Jun-18-2022