最新刊期
      卷 7 ， 期 1 ， 1994
      • Lianlai Zhang,Xianmo Deng
        Vol. 7, Issue 1, Pages: 1-8(1994)
        摘要：This review presents the recent advances of poly (β - hydroxybutyrate) (PHB) in biosynthesis, structure - property and applications. The performances of PHB can be improved by its copolymers and blends. A biopolymer age would be expected to take advantage of modern biotechnology.  
        关键词：Biosynthesis;Bacterial fermentation;Poly(β- hydroxybutyrate);Optical activity;Piezoelectricity;Biodegradability   
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        发布时间：2022-09-18
      • Rongmin Wang,Yunpu Wang
        Vol. 7, Issue 1, Pages: 18-25(1994)
        摘要：Polymers of porphyrins and their complexes are a well - investigated class of polymers, which show good properties in carrying -oxygen, electrical -conducti -vity or catalytic activity. These polymers include of the coordinative (through the metal atom) and covalent (througth the ligand) binding or incorporation of the metalloporphyrin in a polymer clain, and polymeric metalloporphyrins with the metal in the main chain or through the ligand. This review deals with development of synthesis and properties of polymers of porphyrins and their complexes during the past ten years.  
        关键词：Polymer —bound porphyrins;Polymeric metalloporphrins;Porphyrin   
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        发布时间：2022-09-18
      • Rongjiang Yan
        Vol. 7, Issue 1, Pages: 26-30(1994) DOI: 10.14028/j.cnki.1003-3726.1994.01.004
        摘要：Various models describing the structure and the plastic deformation of fibers of oriented crystalline polymers and experimental results supporting these models have been reviewed. Total 42 references are included in this review.  
        关键词：Crystalline polymers;Drawing;Structural model;Plastic deformation   
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        发布时间：2022-09-18
      • Jiazhong Luo,Wenqiang Huang,Binglin He
        Vol. 7, Issue 1, Pages: 31-36(1994)
        摘要：This review deals with various polymeric superacid catalysts. Their classifications, preparations,structures and applications in petroleum chemistry and organic synthesis are discussed.  
        关键词：Superacid;Catalyst;Polymers;Resin   
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        发布时间：2022-09-18
      • Shiyuan Cheng,Jianzong Li,Qingyuan Chen
        Vol. 7, Issue 1, Pages: 37-41,58(1994)
        摘要：The theories,methods of measurement and affection factors of microphase separation of thermoplastic polyurethane elastomers are reviewed.  
        关键词：Microphase separation;Hard - segment;Soft - segment;Noncompactibity;Hydrogen -bond   
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        发布时间：2022-09-18
      • Huaming Li,Pengsheng Liu,Hongbiao Chen
        Vol. 7, Issue 1, Pages: 42-46(1994)
        摘要：In this paper,the research achievement and development of polydicyclopentadiene reaction injection molding (PDCPD RIM) were reviewed,The importance and purpose of making a study on it were also discussed,And finally the development trend and prospect in the field of PDCPD RIM to future were given.  
        关键词：Reaction injection molding;Polydicyclopentadiene;Polymer processing   
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        发布时间：2022-09-18
      • Meixuan Xu,Jinsong Xiao
        Vol. 7, Issue 1, Pages: 47-51(1994)
        摘要：The miscibility,correlation between the network formation and phase seperation and the relationship between the morphology and the properties of IPNs are reviewed. The IPNs based on polyurethanes (PUS).  
        关键词：IPN;Polyurethane;Network formation;Phase seperation;Kinetics   
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        发布时间：2022-09-18
      • Mengjun Cao,Peizhi Lu,Min Yu
        Vol. 7, Issue 1, Pages: 52-58(1994)
        摘要：The polymerization of conjugated dienes by Ziegler - Natta catalysts is studied. It is believed that the active centers of the catalysts are the bimetallic complexes composed of transition metal and organo - aluminum compounds,through lonic chlorine and alkyl or allyl chain endings Controlling the conformation of monomer inserting to the chain ending is of great importance: by chelation of both the double bonds of the monomer with cisoid of conformation on transition metal ions of low ligand field stabilization energy (LFSE),cisl,4 polymers are obtained, and by coordination of only one double bond with transoid conformation,on transition metal irons of higher LFSE,trans 1,4 or 1,2 polymers will be prepared  
        关键词：Coordination polymerization;Ziegler -Natta catalysts;Butadiene   
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        发布时间：2022-09-18
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