[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"doc-seo-325071-105":3,"detail-sidebar-cat-0-en-105":81,"doc-detail-325071-en":130},{"code":4,"msg":5,"data":6},0,"ok",{"site_id":7,"language":8,"slug":9,"title":10,"keywords":11,"description":12,"schema_data":13,"social_meta":74,"head_meta":76,"extra_data":78,"updated_unix":80},105,"en","preparation-of-crimped-polyacrylonitrile-fibers","Preparation of Crimped Polyacrylonitrile Fibers","","The study investigates a laboratory process for preparing crimped polyacrylonitrile (PAN) fibers at the Tashkent Institute of the Textile and Light Industry, focusing on how twisting is controlled during fiber formation. Parameters include the twisting characteristics, stability of modifying dopes, and how treatment conditions affect twist number, twist degree, and twist stability. Measurements follow GOST 13411-71 on an IV-3 instrument. Results show component ratio in the modifying dope changes twisting parameters, while fiber treatment temperature (20°C–60°C) does not alter twist degree. Storage temperature also influences dope stability.",{"@graph":14,"@context":73},[15,34,56],{"@type":16,"itemListElement":17},"BreadcrumbList",[18,23,27,31],{"item":19,"name":20,"@type":21,"position":22},"https://docshare.wps.com","Home","ListItem",1,{"item":24,"name":25,"@type":21,"position":26},"https://docshare.wps.com/document/","Document",2,{"item":28,"name":29,"@type":21,"position":30},"https://docshare.wps.com/document/research-report/","Research & Report",3,{"item":32,"name":10,"@type":21,"position":33},"https://docshare.wps.com/document/preparation-of-crimped-polyacrylonitrile-fibers/325071/",4,{"url":32,"name":10,"@type":35,"image":36,"author":41,"headline":10,"publisher":44,"fileFormat":47,"inLanguage":8,"description":12,"dateModified":48,"datePublished":49,"encodingFormat":47,"isAccessibleForFree":50,"interactionStatistic":51},"DigitalDocument",{"url":37,"@type":38,"width":39,"height":40},"https://docshare.wps.com/thumbnails/preparation-of-crimped-polyacrylonitrile-fibers/325071.png","ImageObject",300,407,{"name":42,"@type":43},"Anda","Person",{"url":19,"name":45,"@type":46},"DocShare","Organization","application/pdf","2026-10-24","2026-09-21",true,{"@type":52,"interactionType":53,"userInteractionCount":55},"InteractionCounter",{"@type":54},"ViewAction",7,{"@type":57,"mainEntity":58},"FAQPage",[59,65,69],{"name":60,"@type":61,"acceptedAnswer":62},"What process is investigated in this document?","Question",{"text":63,"@type":64},"A laboratory method for preparing crimped polyacrylonitrile (PAN) fibers, with attention to controllable twisting characteristics during fiber formation.","Answer",{"name":66,"@type":61,"acceptedAnswer":67},"How does the modifying dope component ratio affect twisting?",{"text":68,"@type":64},"Increasing the ratio of inorganic to organic components at constant organic content improves twisting parameters; increasing the component ratio at constant inorganic content reduces the number of twists, while twisting stability remains constant across ratios.",{"name":70,"@type":61,"acceptedAnswer":71},"Does treatment temperature and dopes storage temperature affect twist degree and stability?",{"text":72,"@type":64},"Twist degree does not change when solution temperatures are varied from 20°C to 60°C. Dopes stored at 4–5°C keep the twist degree stable for several days, while storage at 18–20°C causes a considerable decrease.","https://schema.org",{"og:url":32,"og:type":75,"og:title":10,"og:site_name":45,"og:description":12},"article",{"robots":77,"canonical":32},"index,follow",{"doc_id":79,"site_id":7},325071,1790345581,{"code":4,"msg":82,"data":83},"success",[84,88,92,96,101,106,110,114,119,122,126],{"id":22,"doc_module":4,"doc_module_name":25,"category_name":85,"show_sort_weight":86,"slug":87},"Story & Novel",90,"story-novel",{"id":26,"doc_module":4,"doc_module_name":25,"category_name":89,"show_sort_weight":90,"slug":91},"Literature",80,"literature",{"id":33,"doc_module":4,"doc_module_name":25,"category_name":93,"show_sort_weight":94,"slug":95},"Exam",70,"exam",{"id":97,"doc_module":4,"doc_module_name":25,"category_name":98,"show_sort_weight":99,"slug":100},5,"Comic",60,"comic",{"id":102,"doc_module":4,"doc_module_name":25,"category_name":103,"show_sort_weight":104,"slug":105},6,"Technology",50,"technology",{"id":55,"doc_module":4,"doc_module_name":25,"category_name":107,"show_sort_weight":108,"slug":109},"Healthcare",40,"healthcare",{"id":111,"doc_module":4,"doc_module_name":25,"category_name":29,"show_sort_weight":112,"slug":113},8,30,"research-report",{"id":115,"doc_module":4,"doc_module_name":25,"category_name":116,"show_sort_weight":117,"slug":118},9,"Religion & Spirituality",20,"religion-spirituality",{"id":117,"doc_module":4,"doc_module_name":25,"category_name":120,"show_sort_weight":117,"slug":121},"World Cup","world-cup",{"id":123,"doc_module":4,"doc_module_name":25,"category_name":124,"show_sort_weight":123,"slug":125},10,"Lifestyle","lifestyle",{"id":127,"doc_module":4,"doc_module_name":25,"category_name":128,"show_sort_weight":97,"slug":129},19,"General","general",{"code":4,"msg":82,"data":131},{"doc_id":79,"user_id":132,"nickname":42,"user_avatar":133,"doc_module":4,"category_id":111,"category_name":29,"doc_title":10,"doc_description":12,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":55,"is_deleted":4,"is_public":22,"is_downloadable":22,"audit_status":22,"page_count":123,"language":139,"language_code":8,"site_id":7,"html_lang":8,"table_of_contents":140,"faqs":141,"seo_title":142,"seo_description":12,"update_tm":143,"read_time":144,"preview_page_count":4},962075006959,"https://ap-avatar.wpscdn.com/avatar/e0002397efbe92a78e?_k=1776741047341049297","Akhmedov,S.K.;Abdurakhmanova,Sh.G.;Tashpulatov,Yu.T.  \nPreparation of crimped polyacrilonitrilefibers.3 p.  \nKhim.Volokna No.2:39-40(1984).Filed:  TRANSLATION NO.4429KVLkKVLKA4  \nKhim.Voloknano.2:39-40(1984)  \nT R A N SL A T I O N  \nUDC 677.494.745.32.021.123.652  \nAkhmedov,S.K.,Sh.G.Abdurakhmanova,and Yu.T.Tashpulatov:PREPARATION OFCRIMPED POLYACRYLONITRILE FIBERS.(Poluchenie izvitykh poliakrilonitril'nykhvolokon.)Khimicheskie Volokna,1984,No.2,pp.39-40.  \nAlong with the excellent physical and mechanical properties,man-made fiberspossess some specific properties(smooth,shiny surface,cylindrical cross section,low hygroscopicity),which render their processing difficult and limit their usefor common textile articles.However,it is possible to confer a number of valuableuse-related properties such such fibers by modifying their structure.  The majorityof the existing texturing methods are based upon mechanical effect on the complexfilaments(twisting,corrugation and pressing,profiling on a sharp edge,etc.)with simultaneous heating to stabilize the modified structure [1,p.255].  \nHowever,the above filament-texturing methods require complicated and energy--consuming equipment.Intense investigations have been conducted in various countriesin recent years,and physicochemical methods have been developed,according to whichtexturing is achieved in the fiber formation process.  \nA process for preparing crimped polyacrylonitrile(PAN)fiber has been developedunder laboratory conditions at the Tashkent Institute of the Textile and Light In-dustry.The possibility of controlling the parameters which characterize thetwisting of the PAN fibers,the stability of the properties of the modifying dopesand the effect of the treatment parameters on the number of twists as well as on thedegree and stability of twisting are investigated in this paper.The twisting ofthe fiber was determined according to GOST 13411-71 on an IV-3 instrument [2,p.98].  \nThe effect of the ratio of the components(inorganic and organic components)of the modifying dope on the twisting parameters of the PAN fibers was investigated(Figures 1 and 2).The ratio of the dope components was varied while both theorganic and the inorganic components were maintained constant.As is apparent fromthe data obtained,the increase in the ratio of the inorganic and organic componentsat constant organic component leads to an improvement of the twisting parameters ofthe fiber.The increase in the ratio of the components at constant inorganic compo-nent leads to a reduction of the number of twists in the fiber.The stability ofthe twisting of the fiber(Figure 2)remains constant at all ratios of the componentsof the modifying dope.  \nFigure 1.Dependence of the twisting of the fiber on the ratio of the components inthe modifying dope:  \n1-ratio of the inorganic component of the dope to the organic component at constantorganic component;2-ratio of the inorganic component of the dope to the organiccomponent at constant inorganic component.  \ntwists  \nNumbercof  \nin the dope  \nFigure 2~Dependence of the degree(1)and stability(2)of twisting on the ratio ofthe components in the modifying dope.  \nDegree and sta-  \nRatio of components inthe done  \nIt was of considerable interest to investigate the effect of the temperatureof fiber treatment with the modifying agent on the twisting parameters.  It wasestablished that the degree of twisting of the fiber did not change when the tempe-rature of the solutions of different concentrations was changed from 20℃ to 60°℃.  \nIt became necessary in the course of the investigation to determine theeffects of the various factors(temperature,storage time)on the stability of theproperties of the modifying dopes as wel1.The degree of twisting of the PAN fiberstreated with these dopes was the criterion of the stability of the properties of thedopes.  \nhttps://archive.org/details/preperationofcri00akhm  \nIt was established as a result of the investigations that the storage of themodi","cbCaiaG9SGu8v6nO","https://ap.wps.com/l/cbCaiaG9SGu8v6nO","pdf",377793,"English","# Investigation Scope and Background\n## Laboratory Preparation Process and Measurement Method\n## Effect of Modifying Dope Component Ratio\n## Effect of Treatment Temperature\n## Stability of Modifying Dopes Under Storage\n# References","[{\"question\":\"What process is investigated in this document?\",\"answer\":\"A laboratory method for preparing crimped polyacrylonitrile (PAN) fibers, with attention to controllable twisting characteristics during fiber formation.\"},{\"question\":\"How does the modifying dope component ratio affect twisting?\",\"answer\":\"Increasing the ratio of inorganic to organic components at constant organic content improves twisting parameters; increasing the component ratio at constant inorganic content reduces the number of twists, while twisting stability remains constant across ratios.\"},{\"question\":\"Does treatment temperature and dopes storage temperature affect twist degree and stability?\",\"answer\":\"Twist degree does not change when solution temperatures are varied from 20°C to 60°C. Dopes stored at 4–5°C keep the twist degree stable for several days, while storage at 18–20°C causes a considerable decrease.\"}]","Preparation of Crimped Polyacrylonitrile Fibers | PDF",1789969605,25]