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Start Over Author "Hu, Youliang" Journal chinese science bulletin
11 results on '"Hu, Youliang"'

6. Preparation of long-branched polyethylene byin situ polymerization using late transition metal and metallocene catalysts

Author

Xu Demin, Hu Youliang, Wang Jun, Ma Zhi, Liu Zhongyang, Guo Cunyue, and He Dawei

Subjects
chemistry.chemical_compound, Multidisciplinary, Materials science, Polymerization, chemistry, Polymer chemistry, Copolymer, Coordination polymerization, Post-metallocene catalyst, Polyethylene, In situ polymerization, Metallocene, Catalysis
Abstract

Anin situ polymerization method was investigated to prepare long-branched polyethylene (LBPE) with ethylene alone and a single cocatalyst, methylalumoxane (MAO), by using a dual functional catalytic system containing late transition metal oligomerization catalyst and metallocene copolymerization catalyst. The obtained longbranched polyethylene has the characteristics of low melting point, high activity and well-dispersed sequence distribution.

Published
2001

7. Lldpe prepared byin situ polymerization using a dualfunctional catalytic system of Ti(On-Bu)4 /ALEt3-Et(Ind)2-ZrCl2/MAO

Author

Guo Cunyue, Liu Zhongyang, Wang Jun, HU Youliang, He Dawei, and XU Demin

Subjects
chemistry.chemical_classification, Multidisciplinary, Materials science, Polymer, Polyethylene, Catalysis, Linear low-density polyethylene, chemistry.chemical_compound, Crystallinity, chemistry, Polymerization, Polymer chemistry, Molar mass distribution, Metallocene
Abstract

Linear low-density polyethylene (LLDPE) was prepared byin situ polymerization using a dual-functional catalytic system containing Et(Ind)2ZrCl2/MAO and Ti(OnBu)4/AlEt3 used as co-polymerization catalyst and dimerization catalyst, respectively. The catalytic system showed high activity and the polymer with low melting point, narrow molecular weight distribution (MWD) and low crystallinity was produced.

Published
2001

9. Synthesis of well-defined functional PE graft copolymers via ATRP process.

Author

Cao Chengang, Dong Jinyong, and Hu Youliang

Subjects
POLYETHYLENE, GRAFT copolymers, POLYMERIZATION, STYRENE, POLYMERS, ATOMS
Abstract

Discusses the synthesis of well-defined functional polyethylene graft copolymer via atom transfer radical polymerization (ATRP) process. Transformation of the pendant styrene groups into ATRP initiator sites; Determination of the quantitative hydrochlorination reaction; Lack of polar functional groups on its polymer chain.

Published
2005
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10. LLDPE prepared by in situ polymerization using a dual-functional catalytic system of Ti(On-Bu)[sub4]/AlEt[sub3]-Et(Ind)[sub2]-ZrCl[sub2]/MAO.

Author

Liu Zhongyang, Xu Demin, Guo Cunyue, Wang Jun, He Dawei, and Hu Youliang

Subjects
POLYETHYLENE, POLYMERIZATION
Abstract

Examines the polymerization of a linear low-density polyethylene. Observation of high activity in the catalytic system; Determination of the melting point of the polymer; Production of narrow molecular weight distribution.

Published
2001
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11. Preparation of long-branched polyethylene by in situ polymerization using late transition metal and metallocene catalysts.

Author

Liu Zhongyang, Guo Cunyue, Ma Zhi, Wang Jun, Xu Demin, He Dawei, and Hu Youliang

Subjects
POLYETHYLENE, POLYMERIZATION, METALLOCENE catalysts
Abstract

Investigates the polymerization method in the preparation of long-branched polyethylene (LBPE). Use of late transition metal and metallocene catalysts; Characteristics of LBPE; Determination of narrow molecular weight distribution.

Published
2001
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