Layin Fitar da Roba game da Kayan Danye: Halaye da Amfani da Babban Polyphenylene Sulfide PPS Resin

Layin Fitar da Robagame da Kayan Danye
Polyphenylene sulfide wani sabon nau'in robobi ne na injiniyan aiki. Kwayoyin halittarsa ​​suna ɗauke da raka'o'in tsarin p-phenylene sulfide masu maimaitawa, kuma babban sarkar kwayar halittar tana ɗauke da phenylene sulfide. Nauyin kwayoyin halittarsa ​​shine 10,000-50,000. Polyphenylene sulfide polymer ne mai layi ko reshe wanda ba shi da wurin narkewar kristal. Tsarin layi ne kafin haɗin giciye kuma tsarin thermosetting ne bayan haɗin giciye. Ana iya laushi shi zuwa wani mataki idan aka dumama shi gaba ɗaya kuma aka sanyaya shi.


Ana haɗa sinadarin polyphenylene sulfide daga sodium sulfide da dichlorobenzene a cikin wani sinadari mai ƙarfi na polar. Hanyoyin samarwa sun haɗa da hanyar Michael, hanyar p-halogenated thiophenate self-condensation, hanyar aromatic polyhalide da hanyar polycondensation ta alkali metal sulfide, da sauransu.

Yawan polyphenylene sulfide shine 1.36, kuma resin fari ne ko granules, mai tauri da karyewa, tare da babban lu'ulu'u da kuma ƙarfin narkewar narkewa. Polyphenylene sulfide yana da nau'ikan nauyin kwayoyin halitta guda biyu, ƙarancin nauyin kwayoyin halitta da babban nauyin kwayoyin halitta. Saboda yawan kwararar narkewar narkewa, yana da wuya a yi masa tsari kai tsaye, don haka ban da feshi, dole ne a haɗa wasu hanyoyin a wani mataki na haɗin giciye yayin ƙera, kuma dole ne a haɗa wani adadin zare na gilashi ko resin inorganic don ƙera allura, ƙera da ƙera extrusion. a cikin cikawa. Ba a buƙatar haɗa polyphenylene sulfide mai nauyin kwayoyin halitta ba kuma ana iya amfani da shi kai tsaye wajen sarrafa kayayyakin filastik.



PPS tana da kashin baya mai tauri mai daidaito kuma ɓangare ne na polymer mai lu'ulu'u wanda ya ƙunshi zoben benzene masu maimaitawa da ƙwayoyin sulfur. PPS wani filastik ne na injiniya na musamman wanda ke da babban aiki da kuma wurin narkewa mai yawa har zuwa 280 °C wanda zai iya maye gurbin ƙarfe. Yana nan a saman dala na aikin polymer, kamar yadda aka nuna a Hoto na 1. Saboda wannan dalili, bisa ga kyakkyawan aikin resin PPS, yana cika buƙatun kayan aikin ayyukan filastik na injiniya masu wahala.



1. Halayen resin polyphenylene sulfide mai aiki mai girma
(1) Resin PPS mai aiki mai kyau polymer ne mai ƙarfi mai ƙarfi. Abubuwan da ke cikin lu'ulu'unsa kusan kashi 65% ne. Saurin lu'ulu'u mai sauri, kyakkyawan ruwa da kuma gajeren zagayen ƙera shi.

(2) Kyakkyawan juriya ga zafi. Wurin narkewar sa zai iya kaiwa 275 ~ 291°C, zafin karkatar da zafi shine 135°C, kuma zafin karkatar da zafi bayan ƙarfafa zaren gilashi zai iya kaiwa 260°C. A cikin iska da nitrogen, zafin farko da rauni na polyphenylene sulfide yana kusan 400°C, yana ruɓewa a cikin iska a 700°C, kuma har yanzu yana iya riƙe kashi 40% na nauyinsa a cikin iskar gas mara aiki a 1000°C. Zafin amfani na dogon lokaci shine 200 ~ 240°C, kuma juriyar zafi na shingen gas da kwanciyar hankali na zafi na dogon lokaci sun fi duk robobi na injiniya na yanzu.

(3) Yana da kyawawan halaye na injiniya. Yana da matuƙar tauri, ƙarfin saman, ƙarancin raguwar tauri a yanayin zafi mai yawa, kuma yana da kyakkyawan juriya ga rarrafe, juriya ga gajiya da juriyar lalacewa. Ana iya inganta juriyarsa ta hanyar cika man shafawa kamar fluororesin da carbon fiber. Kuma an inganta shi sosai.

(4) Yana da juriyar tsatsa da juriya ga sinadarai masu kyau. Baya ga acid mai ƙarfi da ke haifar da iskar oxygen (kamar sulfuric acid mai ƙarfi, nitric acid, da sauransu), yana kuma iya jure wa tsatsa na wasu acid, alkalis da gishiri, kuma ba ya narkewa a cikin kowace sinadari ta halitta a ƙasa da 200 ° C. Juriyar tsatsarsa kusan daidai take da ta polytetrafluoroethylene. Bugu da ƙari, PPS kuma yana da kyakkyawan juriya ga yanayi da radiation, kuma aikinsa ba zai shafi tasirin hasken ultraviolet da gamma-ray da radiation neutron masu ƙarfi da yawa ba.

(5) Yana da ƙaramin adadin shan ruwa (0.008%) kawai da kuma yawan shan mai. Ƙaramin raguwar ƙera kayan gini da kuma yawan faɗaɗawa ta layi, samfurin yana da girma mai ƙarfi da ƙananan nakasa, kuma har yanzu yana iya kiyaye daidaiton girma ko da a wasu yanayi masu danshi, mai da gurɓataccen iskar gas, don haka ana iya amfani da shi don yin gyare-gyare daidai.

(6) Kyakkyawan halayen lantarki. Resin PPS mai aiki mai yawa ba shi da wani canji a cikin juriyar girma a ƙarƙashin zafin jiki mai yawa da zafi mai yawa, kuma daidaiton dielectric ɗinsa yana canzawa kaɗan tare da zafin jiki da mita. Bugu da ƙari, abubuwan da ke cikin ƙazanta na ion ba su da yawa, kuma ana iya nutsar da shi a cikin baho mai solder a 260 ° C, don haka yana iya jure wa soldering a saman. Girgizar zafi na kayan lantarki, wanda ya dace da samfuran da ke da buƙatu masu yawa akan aikin lantarki. Yana da juriya mai yawa da ƙarancin halayen dielectric.

(7) Resin PPS mai aiki mai kyau yana da ƙarancin ɗanko na narkewa da kuma kyakkyawan ruwa. Yana da sauƙin jikawa da kuma taɓawa da zaren gilashi, don haka yana da sauƙin cikawa. Zaren gilashin ko kuma zaren gilashin fiber-inorganic wanda aka ƙera shi yana da juriya mai ƙarfi, juriya mai lanƙwasa da kuma juriyar da ke tattare da shi.

(8) Resin PPS mai aiki mai kyau yana da ƙarfin haɗa gilashi, aluminum, bakin ƙarfe, da sauransu. Ƙarfin haɗa gilashi ya fi na gilashi girma.