Tian Chun-rong

Dahua Hospital

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Wang Jian-hua

Space Engineering University

Shuen Liang

China Academy of Engineering Physics

Yu Yang

South China Agricultural University

Huang Yuxi

Guangzhou University of Chinese Medicine

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China Academy of Engineering Physics

Space Engineering University

Fujian Normal University

China National Petroleum Corporation (China)

Xi'an University of Technology

Shanghai Entry-Exit Inspection and Quarantine Bureau

Jiangsu University of Science and Technology

China Institute of Water Resources and Hydropower Research

Wuhan Institute of Technology

NOF Corporation (Japan)

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Structure and Mechanical Properties of Polyurethane Elastomers

Cailiao kexue yu gongcheng xuebao (2003)

Tian Chun-rong

A serials of polyurethane (PU) elastomers with 4,4′-methylene diphenyl diisocynat(MDI), tolyene-2,4-diisocyanate(TDI) as hard segments and poly(tetramethylene glycol) (PTMG) with different molecular weight as soft segments were synthesized by catalyst at room temperature, and the chemical structures of soft segments and hard segments that affected the mechanical properties were also studied. The result demonstrated that the mechanical performance and damping properties of MDI-PU elastomers were superior to that of TDI-PU, because of MDI has symmetrical structure and arranged regularly that enhanced the compatibility and interaction between hard segments and soft segments, and improved the mechanical damping performance.

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STUDIES ON DAMPING PROPERTIES OF POLYURETHANE/VINYL ESTER RESIN COMPOSITE ELASTOMER

Tian Chun-rong

A series of polyurethane/vinyl ester resin (PU/VER) composite elastomers were prepared by precursors polymerization. The damping properties of PU/VER samples, with different composition, different isocyanate index and hydroxyl groups in VER metered or not, were studied by dynamic mechanical analysis (DMA). The results demonstrated that PU/VER composite elastomers show better damping properties at PU/VER=60/40 and isocyanate index at close range 1. When hydroxyl groups in VER were not metered, the elastomers presented two glass-transition temperatures. Furthermore, the damping temperature range of PU/VER cross-linking copolymer with better tan δ within normal temperature range was beyond 100 ℃, when VER acted as cross-linking agent of PU.

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Advances in Polyhedral Oligomeric Silsesquioxane and Its Application in Polymer

Yu Yang Tian Chun-rong

The structure and propertyt of polyhedral oligomeric silsesquioxane are reviewed.A few methods to synthesize polyhedral oligomeric silsesquioxane and the applications in the polymer of polyhedral oligomeric silsesquioxane are discussed.The developments of polyhedral oligomeric silsesquioxane aftertime are expatiated.

Silsesquioxane

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Research on Properties of Rigid Polyurethane Foam Prepared by Soybean Oil-based Polyol

China Plastics (2012)

Huang Yuxi Tian Chun-rong Shuen Liang Wang Jian-hua

Petrochemical polyol was partially replaced with soybean oil-based polyol in the preparation of rigid polyurethane foam(RPUF).The effects of fraction of soybean oil-based polyol and density of RPUF on the properties of RPUF were studied.It showed that with increasing contents of soybean oil-based polyol,the impact strength and compression modulus of RPUF reduced,however,the yield point gradually disappeared,and glass-transition temperature increased.With increasing density,the impact strength,compression modulus,and storage modulus of RPUF increased,the compression modulus reached 56.44 MPa.

Soybean oil

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