DSpace Home
→
Browsing by Subject

Browsing by Subject "Ziegler-Natta catalysts"

Now showing items 1-19 of 19

Catalyst development for polyethylene synthesis : effect of chlorinated compounds on Ziegler catalyst

Niwat Athiwattananont (Chulalongkorn University, 1998)
The chemistry of titanium precursors, butylchloride and cocatalyst for improvement of catalyst activity in ethylene polymerization

Goond Hongmanee (Chulalongkorn University, 2012)

The improvement of Ziegler-Natta catalyst activity can be achieve by adjusting the related factors. This research was aimed to investigate the effects of titanium precursors, butylchloride and cocatalyst on the ethylene ...
Development of industrial film from HDPE/MLLDPE blend

Hatairat Parichattakul (Chulalongkorn University, 1997)

High density polyethylene (HDPE)/metallocene linear low density polyethylene (MLLDPE) blend and high density polyethylene/Ziegler-Natta linear low density polyethylene (Z-NLLDPE) blend were prepared by melt mixing in a ...
Effect of electron donor and ethylene content on ziegler-natta catalyst

Sawad Wongprechasawad (Chulalongkorn University, 1999)

The effects of ethylene content and CHMDMS(Cyclohexylmethyldimethoxysilane) on ethylene propylene copolymerization, with MgCl₂₋ supported TiCl₄ catalyst activated by Al(C₂H₅)₃, have been investigated. The intensity of the ...
Effect of hydrogen on Ziegler - Natta catalysts prepared by different methods for ethylene polymerization

Thanyathon Niyomthai (Chulalongkorn University, 2016)

This study focuses on effect of hydrogen on Ziegler-Natta (ZN) catalyst system for ethylene polymerization. The study was divided into four parts. Regarding to the first part, two types of ZN catalysts, TiCl4/MgCl2/THF ...
Effect of impurities in ethylene gas on the catalytic activity of ziegler-natta catalyst and polyethylene properties

Auksarapuk Puriwathana (Chulalongkorn University, 2012)

In this current study, the various types of impurity, which were mostly found in ethylene gas, were used to investigate the influence of impurities on the catalytic activity of a commercial Ziegler-Natta catalyst and ...
Effect of lewis acid on the activity of ziegler-natta catalyst and the properties of polyethylene

Wanna Phiwkliang (Chulalongkorn University, 2013)

This dissertation investigated the effects of Lewis acid compounds on ethylene polymerization with MgCl2-supported Ziegler-Natta catalysts. The study could be divided into three parts. Firstly, the modification of ...
EFFECT OF TITANIUM CONTENT ON ZIEGLER-NATTA CATALYST PERFORMANCE

Nittaya Sudsong (Chulalongkorn University, 2014)

In this study, the effect of titanium content through using Lewis acid in the removal of Lewis base (EtOH and THF) in MgCl2 structure was investigated. The catalytic activity of synthesized catalysts was tested in ethylene ...
Ethylene polymerization by ziegler-natta and metallocene catalyst systems : morphology study and characterization

Punlop Horharin (Chulalongkorn University, 1999)

Since the discovery of TiCl4/AlEt3 catalyst for olefin polymerization in the early 1950s, many generations of such Ziegler-Natta catalysts have been developed. The most active generation is TiCl4 supported on MgCl2. At the ...
Influence of internal and external electron-donors in a supported ziegler-natta catalyst on isotacticity of polypropylene

Nittakant Chattay (Chulalongkorn University, 1997)

The slurry polymerization of propylene with TiCl4-AlEt3 catalyst system on MgCl2 support was investigated to study the effect of addition of internal electron donor and external electron donor to polypropylene synthesis. ...
Investigation of the dependence of hexane-soluble fraction of polyethylene formed during slurry polymerization of ethylene with ziegler-natta catalyst

Chongkiat Visetjung (1998)

The polymerization conditions affecting the amount of hexane-soluble fraction of polyethylene or low molecular weight polyethylene (LMWPE) which is the by-product of slurry polymerization process of ethylene with Ziegler-Natta ...
Maximization of the amount of active titanium fixed on the surface of the supported ziegler-natta catalyst

Patcharin Maneeroj (Chulalongkorn University, 2000)

Slurry polymerization of propylene polymerization was investigated to maximize the amount of active titanium fixed on the surface of supported Ziegler-Natta catalyst composed of magnesium chloride/2-ethylhexanol/titanium ...
A metallocene-methylaluminoxane catalyst for ethylene polymerization

Chaiwat Pornchaijaroonsak (Chulalongkorn University, 1995)

Homogeneous polymerization of ethylene was investigated on soluble metallocene Ziegler-Natta catalyst. The catalyst was prepared from bis-(cyclopentadienyl)-zirconium dichloride, in conjuction with methylaluminoxane in ...
Modification of mgcl2-supported Ziegler-Natta catalyst with Lewis acids for ethylene copolymerization

Chatchai Tharawadee (Chulalongkorn University, 2011)

This research aims to investigate the effect of Lewis acids on the synthesized Ziegler-Natta (ZN) catalyst (MgCl2+Lewis acid/DEAC/TiCl4) for ethylene polymerization with various ratios of AlCl3 and ZnCl2 as the Lewis acids ...
QSAR/QSPR AND MECHANISTIC STUDIES OF ELECTRON DONORS IN ZIEGLER-NATTA CATALYZED PROPYLENE POLYMERIZATION

Manussada Ratanasak (Chulalongkorn University, 2014)

Electron donors are added to Ziegler-Natta catalyzed propylene polymerization to enhance the productivity and isotacticity of polymer products. The development of new electron donors becomes the key target in designing new ...
Reinforcement of Polypropylene with Polypropylene-Co-Poly(Ethylene-Propylene) Copolymer prepared by Ziegler-Natta catalyst

Satit Thanyaprueksanon (Chulalongkorn University, 2005)

In this research, the reinforcement of polypropylene (PP) was studied by using the new appropriate method for synthesizing polypropylene-block-poly (ethylene-propylene) copolymer (PP-co-EP), which can be utilized as rubber ...
Supported ziegler-natta catalyst prepared from magnesium ethyl carbonate for ethylene polymerization

Awiruth Thongdonjui (Chulalongkorn University, 2008)

This work focused on the preparation and optimum condition for active MgCl2 based support. The reactant magnesium ethyl carbonate was prepared by reacting magnesium ethoxide with carbon dioxide in ethanol as medium. The ...
การเตรียมอนุภาคเมกนีเซียมคลอไรด์ทรงกลมโดยกระบวนการอบแห้งแบบพ่นฝอย

ปรัชญา โรจน์อโณทัยกุล (จุฬาลงกรณ์มหาวิทยาลัย, 2554)

โพลีเอททีลีนเป็นวัสดุสำคัญที่จำเป็นต่อการดำรงชีวิตในปัจจุบัน การผลิตโพลีเอททีลีนนั้นจำเป็นอย่างยิ่งที่ต้องมีตังเร่งปฏิกิริยา โดยในช่วงปี 1950 มีนักวิจัยคิดค้นตัวเร่งปฏิกิริยาสำหรับการผลิตโพลีเอททีลีนขึ้น เป็นที่รู้จักในช ...
โครงการวิจัยการใช้วัสดุนาโนเป็นตัวรองรับของตัวเร่งปฏิกิริยาซีเกอร์-แนตตาและเมทัลโลซีน : รายงานการวิจัยฉบับสมบูรณ์

ปิยะสาร ประเสริฐธรรม; บรรเจิด จงสมจิตร; จูงใจ ปั้นประณต (จุฬาลงกรณ์มหาวิทยาลัย, 2554)

โครงการวิจัยนี้ได้ศึกษาผลของการใช้ตัวกระตุ้นที่ผสมกันต่อการโคพอลิเมอร์ไรเซชันของเอทิลีนกับหนึ่งเฮกซีนด้วยตัวเร่งปฏิกิริยาซีเกอร์-แนตตาที่มีซิลิกากับแมกนีเซียมคลอไรด์เป็นตัวรองรับ โดยมีรายละเอียดดังนี้ งานวิจัยนี้แสดงถึงผ ...

Now showing items 1-19 of 19

Search DSpace

Advanced Search

Browse

All of DSpace

Browsing by Subject "Ziegler-Natta catalysts"

Browsing by Subject "Ziegler-Natta catalysts"

Search DSpace

Browse

All of DSpace

My Account