CAJ | 학술논문

聚乙烯(PE)以其性优、价廉的优势,成为通用合成树脂中产量最大的品种,主要包括低密度聚乙烯(LDPE)、线性低密度聚乙烯(LLDPE)、高密度聚乙烯(HDPE)、中密度聚乙烯(MDPE)、以及一些具有特殊性能的专用料树脂.催化剂是聚烯烃工业的核心,通过调控活性中心和改善聚合工艺,提高了催化剂活性,完善了所得聚烯烃的性能,推动了聚乙烯工业的蓬勃发展.研发特殊性能或优异性能聚烯烃树脂的催化剂,是目前聚烯烃领域关注的焦点.本文对近年来国外聚乙烯催化剂的研究进展进行了综述,重点阐述了目前研究开发中的催化工艺,涵盖了Ziegler-Natta催化剂、铬催化剂、茂金属催化剂、过渡金属催化剂以及制备双峰或宽峰分布聚烯烃的复合催化剂等;对各类新型催化剂的制备方法和工艺特点进行了总结,同时指明了相关工艺的研发公司,以便国内相关研究部门借鉴.
취을희(PE)이기성우、개렴적우세,성위통용합성수지중산량최대적품충,주요포괄저밀도취을희(LDPE)、선성저밀도취을희(LLDPE)、고밀도취을희(HDPE)、중밀도취을희(MDPE)、이급일사구유특수성능적전용료수지.최화제시취희경공업적핵심,통과조공활성중심화개선취합공예,제고료최화제활성,완선료소득취희경적성능,추동료취을희공업적봉발발전.연발특수성능혹우이성능취희경수지적최화제,시목전취희경영역관주적초점.본문대근년래국외취을희최화제적연구진전진행료종술,중점천술료목전연구개발중적최화공예,함개료Ziegler-Natta최화제、락최화제、무금속최화제、과도금속최화제이급제비쌍봉혹관봉분포취희경적복합최화제등;대각류신형최화제적제비방법화공예특점진행료총결,동시지명료상관공예적연발공사,이편국내상관연구부문차감.
Polyethylene(PE) includes LDPE,LLDPE,HDPE,MDPE and special resins has been most used resin listed in synthetic resin because of the advantages such as low cost and good properties. Catalyst is the core of technology in polyolefin industry. The progressive developments have been made in polyethylene because the catalytic performances are increased along with well-defining active sites and modifying polymerization process. It has been focused on catalysts for polyethylenes with advanced properties and applicable performance. The latest progresses of catalysts for ethylene polymerization have been reviewed along with catalytic process. It is especially focused on model catalysts such as Ziegler-Natta, metallocene, Phillips based on chromium, and transition metal complexes as well as polyethylenes with broad and/or bimodal molecular weight distributions Herein the preparation methodology and characteristic processes are discussed along with various corporations.