Iyo Thermoplastic Polymers Inotyisa?
Thermoplastic polima imhando yepurasitiki inogona kunyungudutswa uye kuumbwa patsva kakawanda pasina kuita shanduko yakakosha yemakemikari. Iwo anoshandiswa zvakanyanya mumaindasitiri akasiyana siyana, kusanganisira kurongedza, mota, kuvaka, uye zvekurapa. Nekudaro, kune kushushikana kuri kukura pamusoro pehunogona huturu hwe thermoplastic polymers uye kukanganisa kwavo pahutano hwevanhu uye nharaunda.
Kupisa kwe thermoplastic polymers depends pazvinhu zvakati wandei, kusanganisira yavo makemikari kuumbwa, zvekuwedzera, uye nzira dzekugadzirisa. Mamwe mapolima e thermoplastic, akadai se polyvinyl chloride (PVC), ine makemikari ane chepfu senge phthalates, lead, uye cadmium, iyo inogona kubuda kunze kwechinhu ichisvibisa nharaunda uye cheni yechikafu. PVC inozivikanwawo kuburitsa dioxins, boka rine muchetura wemakemikari anogona kukonzera kenza, matambudziko ekubereka uye ekukura, uye kukuvara kwe immune system.
Mamwe mapolima e thermoplastic, akadai se polyethylene (PE) uye polypropylene (PP), anonzi akachengeteka uye asina chepfu pane PVC. Nekudaro, ivo vangangove vaine zvekuwedzera senge stabilizers, antioxidants, uye plasticizers, izvo zvinogona kuve nemhedzisiro yehutano husina kunaka kana vakatama kunze kwechinhu uye kupinda mumuviri. Semuenzaniso, mamwe mapurasitiki anoshandiswa muPE nePP, akadai sebisphenol A (BPA) uye phthalates, akabatanidzwa nekukanganiswa kwehomoni, matambudziko ekukura, uye kenza.
Kupisa kwe thermoplastic polymers zvakare depends pamaitiro avo ekugadzirisa. Dzimwe nzira dzekugadzirisa, senge jekiseni rekugadzira uye extrusion, dzinogona kuburitsa utsi hune muchetura uye zvimedu zvinogona kukuvadza vashandi nenharaunda. Semuenzaniso, kugadzirwa kwepolycarbonate (PC), thermoplastic polymer inoshandiswa mumagetsi nemidziyo yekurapa, inosanganisira kushandiswa kwebisphenol A (BPA), kemikari yakabatanidzwa nekukanganiswa kwehomoni uye kenza.
Kudzikamisa huturu hunogona kuitika hwe thermoplastic polymers, mirau yakasiyana-siyana uye zviyero zvakagadziridzwa kudzikamisa kushandiswa kwemakemikari ane njodzi uye kuve nechokwadi chekuchengetedzwa kwevashandi nevatengi. Somuenzaniso, the EurOpenan Union yakarambidza kushandiswa kwemamwe phthalates mumatoyi uye zvigadzirwa zvekuchengeta vana, uye United States yakarambidza kushandiswa kwe lead uye. cadmium mune zvigadzirwa zvevatengi. Pamusoro pezvo, mamwe makambani akagadzira dzimwe nzira dzakachengeteka kune dzechinyakare thermoplastic polymers, senge biodegradable mapurasitiki akagadzirwa kubva kune zvinodzoreredzwa zviwanikwa.
Mukupedzisa, huturu hwe thermoplastic polymers depends pamakemikari avo ekuumbwa, ekuwedzera, uye nzira dzekugadzirisa. Mamwe thermoplastic polymers, akadai PVC, ine makemikari ane chepfu anogona kubuda kunze kwechinhu uye kusvibisa zvakatipoteredza uye chikafu chekudya. Mamwe mapolima e thermoplastic, akadai sePE nePP, anoonekwa seakachengeteka asi anogona kunge aine zvekuwedzera zvinogona kuve nemhedzisiro yehutano. Kuve nechokwadi chekuchengetedzwa kwevashandi nevatengi, mirau yakasiyana-siyana uye zviyero zvakagadziridzwa kudzikamisa kushandiswa kwemakemikari ane njodzi uye kukurudzira kushandiswa kwedzimwe nzira dzakachengeteka.