Halin Jiki Da Sinadari Na Gudun Polyethylene

Halin Jiki Da Sinadari Na Gudun Polyethylene

Chemical Properties

Polyethylene yana da kwanciyar hankali mai kyau kuma yana jure wa tsarma nitric acid, tsarma sulfuric acid da kowane taro na hydrochloric acid, hydrofluoric acid, phosphoric acid, formic acid, acetic acid, ruwan ammonia, amines, hydrogen peroxide, sodium hydroxide, potassium hydroxide, da dai sauransu mafita. Amma ba shi da juriya ga lalatawar iskar oxygen mai ƙarfi, kamar fuming sulfuric acid, nitric acid mai daɗaɗɗa, chromic acid da cakuda sulfuric acid. A cikin zafin jiki, abubuwan da aka ambata a sama za su lalata polyethylene sannu a hankali, yayin da a 90-100 ° C, sulfuric acid da aka tattara da kuma tattarawar nitric acid za su rushe polyethylene da sauri, haifar da lalacewa ko rushewa. Polyethylene yana da sauƙi don zama hoto-oxidized, thermally oxidized, bazuwar ozone, kuma cikin sauƙi ƙasƙanta ƙarƙashin aikin hasken ultraviolet. Baƙar fata carbon yana da kyakkyawan tasirin kariya na haske akan polyethylene. Abubuwan da suka haɗa da haɗin kai, sarƙaƙƙiya, da samuwar ƙungiyoyi marasa ƙarfi na iya faruwa bayan haskakawa.

Mechanical Properties

Abubuwan injiniya na polyethylene sune kwayoyin halittaral, Ƙarfin ƙwanƙwasa yana da ƙananan, ƙarfin juriya ba shi da kyau, kuma tasirin tasiri yana da kyau. Tasiri ƙarfi LDPE>LLDPE>HDPE, sauran inji Properties LDPE crystallinity da zumunta kwayoyin nauyi, tare da inganta wadannan Manuniya, ta inji Properties ƙara. Juriya na tsagewar yanayin muhalli ba shi da kyau, amma lokacin da nauyin kwayoyin dangi ya karu, yana inganta. Kyakkyawan juriya mai huda, daga cikinsu LLDPE shine mafi kyau.

Halayen muhalli

Polyethylene shine polymer inert alkane tare da kyakkyawan kwanciyar hankali. Yana da juriya ga lalata ta acid, alkali da gishiri aqueous mafita a dakin da zafin jiki, amma ba resistant zuwa karfi oxidants kamar oleum, maida hankali nitric acid da chromic acid. Polyethylene ne insoluble a kowa kaushi a kasa 60 ° C, amma zai kumbura ko fashe a cikin dogon lokaci lamba tare da aliphatic hydrocarbons, aromatic hydrocarbons, halogenated hydrocarbons, da dai sauransu Lokacin da zafin jiki ya wuce 60 ℃, shi za a iya narkar da a cikin wani karamin adadin a toluene. ,amyl acetate, trichlorethylene, turpentine, mineral mai da paraffin; lokacin da zafin jiki ya fi 100 ℃, ana iya narkar da shi a cikin tetrala.

Tun da kwayoyin polyethylene sun ƙunshi ƙananan nau'i biyu na nau'i-nau'i biyu da ether bond, bayyanar rana da ruwan sama zai haifar da tsufa, wanda ke buƙatar ingantawa ta hanyar ƙara antioxidants da masu daidaita haske.

Halayen sarrafawa

Saboda LDPE da HDPE suna da ruwa mai kyau, ƙananan zafin jiki, matsakaicin danko, ƙarancin bazuwar zafin jiki, kuma ba sa bazuwa a babban zafin jiki na 300 ℃ a cikin iskar gas, su robobi ne tare da kyakkyawan aiki. Duk da haka, danko na LLDPE ya dan kadan mafi girma, kuma ƙarfin motar yana buƙatar ƙarawa da 20% zuwa 30%; yana da wuyar narke karaya, don haka wajibi ne a kara yawan raguwa da kuma ƙara kayan aikin sarrafawa; zafin aiki ya ɗan fi girma, har zuwa 200 zuwa 215 ° C. Polyethylene yana da ƙarancin sha ruwa kuma baya buƙatar bushewa kafin sarrafawa.

Polyethylene narke ruwa ne wanda ba na Newtonian ba, kuma dankonsa yana canzawa kaɗan da zafin jiki, amma yana raguwa da sauri tare da haɓaka ƙimar juzu'i kuma yana da alaƙar layi, wanda LLDPE ke da raguwar hankali.

Abubuwan polyethylene suna da sauƙin crystallize yayin aikin sanyaya, sabili da haka, ya kamata a biya hankali ga zafin jiki na mold yayin aiki. Don sarrafa crystallinity na samfurin, don haka yana da kaddarorin daban-daban. Polyethylene yana da ƙananan gyare-gyaren gyare-gyare, wanda dole ne a yi la'akari da shi lokacin zayyana ƙirar.

Halin Jiki Da Sinadari Na Gudun Polyethylene