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生物基δ-己内酯与L-丙交酯顺序开环共聚制备热塑性弹性体及其性质研究

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高分子学报 2024年第5期55卷 582-593页

作者：王丽颖沈勇李志波生态化工国家重点实验室培育基地青岛科技大学化工学院山东省高等学校生物基高分子材料重点实验室青岛科技大学高分子科学与工程学院青岛266042

发展可再生、可降解脂肪族热塑性弹性体有望部分替代目前广泛使用的聚苯乙烯型热塑性弹性体材料,对于解决塑料污染问题具有重要意义.本工作以商品化的生物基单体δ-己内酯和L-丙交酯为原料,利用有机碱(t-BuP_(2))/脲二元催化体系实现其... 详细信息

发展可再生、可降解脂肪族热塑性弹性体有望部分替代目前广泛使用的聚苯乙烯型热塑性弹性体材料,对于解决塑料污染问题具有重要意义.本工作以商品化的生物基单体δ-己内酯和L-丙交酯为原料,利用有机碱(t-BuP_(2))/脲二元催化体系实现其顺序开环聚合,成功制备得到聚乳酸-b-聚(δ-己内酯)-b-聚乳酸三嵌段共聚物.这些三嵌段共聚物随软硬段比例不同表现出不同的力学性质.在硬段体积分数较高时(0.30

关键词：热塑性弹性体压敏胶三嵌段共聚物开环聚合脂肪族聚酯

有机碱催化ω-十五内酯开环聚合制备类聚乙烯性质的可降解塑料

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高分子学报 2024年第8期55卷 976-985页

作者：黄炳政韩瑞李峥李志波青岛科技大学化工学院青岛266042 青岛科技大学高分子科学与工程学院青岛266042

以环三磷腈碱(CTPB)为催化剂,以苄醇(BnOH)为引发剂,实现了ω-十五内酯(PDL)的高效可控开环聚合.通过优化实验条件,得到了高分子量的聚ω-十五内酯(PPDL).示差扫描量热法(DSC)表征证明了PPDL聚酯材料较好的结晶性.高分子量的PPDL不仅有... 详细信息

以环三磷腈碱(CTPB)为催化剂,以苄醇(BnOH)为引发剂,实现了ω-十五内酯(PDL)的高效可控开环聚合.通过优化实验条件,得到了高分子量的聚ω-十五内酯(PPDL).示差扫描量热法(DSC)表征证明了PPDL聚酯材料较好的结晶性.高分子量的PPDL不仅有与聚乙烯相似的力学性质、结晶性和高熔点(T_(m)=95.5℃),而且还具有聚酯类材料的降解性.合成了PDL与ε-己内酯(ε-CL)的无规共聚物,证明可以通过改变ε-CL的含量实现共聚物的熔点、力学性质和降解性可控调节.进一步通过双官能团引发剂合成中低分子量的双羟基端PPDL,证明可以通过与二异氰酸酯进行扩链反应制备高分子量PPDL(PPDL-E),力学性能能够得到有效提升.最后在碱性条件下实现了PPDL共聚酯的水解,验证了PPDL及其与ε-CL共聚物的水解性能.

关键词：开环聚合有机碱类聚乙烯高分子可降解聚酯

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有机碱催化苯基硅橡胶的合成与阻尼性能研究

高分子学报 2024年第10期55卷 1290-1299页

作者：杨言贾维杰段市委赵娜李志波青岛科技大学高分子科学与工程学院青岛266042 怡维怡橡胶研究院青岛266045

采用有机环三磷腈碱(CTPB)为催化剂,通过阴离子开环聚合制备了不同苯基含量的高分子量二苯基硅橡胶生胶,添加白炭黑及其他阻尼填料制备成硅橡胶,研究了苯基含量、白炭黑用量以及不同填料对硅橡胶阻尼性能的影响.结果表明,苯基含量提高,... 详细信息

采用有机环三磷腈碱(CTPB)为催化剂,通过阴离子开环聚合制备了不同苯基含量的高分子量二苯基硅橡胶生胶,添加白炭黑及其他阻尼填料制备成硅橡胶,研究了苯基含量、白炭黑用量以及不同填料对硅橡胶阻尼性能的影响.结果表明,苯基含量提高,硅橡胶的阻尼损耗峰向高温移动,有效阻尼温域变宽.添加50份白炭黑的40 mol%苯基硅橡胶,兼具良好的力学性能与阻尼性能,有效阻尼温域可达113℃(-31~82℃).采用炭黑K90和石墨烯片替代传统白炭黑填料,有效阻尼温域可进一步拓宽至127℃(-27~100℃)和133℃(-33~100℃).

关键词：苯基硅橡胶硅橡胶阻尼性能有机催化开环聚合

Preparation of Degradable Polymenthide and Its Elastomers from Biobased Menthide via Organocatalyzed Ring-opening Polymerization and UV Curing

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Chinese Journal of Polymer Science 2020年第10期38卷 1092-1098,I0006页

作者： Na Zhao Xin-Xin Cao Jin-Feng Shi zhi-bo li Key Laboratony of Biobased Polymer Materials Shandong Provincial Education DepartmentCllege of Polymer Science and EngineeringQingdao Universityof Science and Technology Qingdao 266042China

Development of degradable polyester elastomers plays an important role in the applications of soft *** polymenthides(PMs)from menthol derived lactone monomers are excellent soft segments for preparing degradable polyester *** using cyclic trimeric phosphazene base(CTPB)as an organocatalyst,we succesfully synthesized PMs with different molecular weights(8.2 kDa to 100.7 kDa)in high yields via ring-opening polymerization(ROP)of *** a CTPB/urea binary catalytic system was adopted,the polymerizations proceeded in a more controlled *** glycerol as initiator,star shaped PMs with *** structure were synthesized and subsequently end-capped by *** iradiation of the terminal acrylate groups in the star-shaped PMs resulted in formation of chemically cos-linked polyester elastomers without heat or other *** obtained polyester elastomers exhibit matched modulus(3.8-5.5 MPa),tensile strength(0.56-0.68 MPa),and strain at break(280%-320%)with soft body tssues,displaying great potential in biomedical applications.

关键词： Polyester elastomer Cyclic trimeric phosphazene base Ring-opening polymerization Menthide,Biobased polyester

Facile Synthesis of Polycarbonate Diol via Copolymerization of CO_(2) and Cyclohexene Oxide Catalysed by a Combination of One-Component Phosphonium borane Lewis Pair and Water

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Chinese Journal of Polymer Science 2023年第5期41卷 735-744,I0009页

作者： Xiao-Wu Wang Ji-Wen Hui Yu-Tao li Yan-Ru Gu zhi-bo li State Key Laboratory Base of Eco-Chemical Engineering/College of Chemical Engineering Qingdao University of Science and TechnologyQingdao 266042China Key Laboratory of Biobased Polymer Materials Shandong Provincial Education Department/School of Polymer Science and EngineeringQingdao University of Science and TechnologyQingdao 266042China

Well-defined polycarbonate diol was successfully synthesized through a strategy using a combination of organocatalyst and *** strategy was less developed in organocatalyzed polymerization and frequently regarded as side ***,one-component phosphonium borane Lewis pairs PB1-PB8 were successfully applied in the copolymerization of CO_(2) and cyclohexene oxide(CHO)to generate poly(CHO-alt-CO_(2))carbonate(PCHC).Parameters of linker length and counter anion effects on the catalyst activity were *** was found that Lewis pair PB3 served as a dual initiator and catalyst in the copolymerization of CHO and CO_(2) with or without the presence of *** contrast,Lewis pair PB8 can serve as a true catalyst for the preparation of well-definedα,ω-hydroxyl PCHC *** was achieved by introducing a labile CF3COO group as counter anion through anion exchange reaction while water molecules acted as chain transfer *** function of trifluoroacetate group in the polymerization process was investigated in detail and possible mechanism was *** changing the amount of water and catalyst loading,PCHC diols with varied molecular weight(1.5 kg/mol to 7.5 kg/mol),low dispersities(Dbonate content(>99%)could be easily *** low molecular weight PCHC diol was used as a bifunctional macroinitiator for the ring-opening polymerization of L-lactide(LLA)to afford ABA triblock copolymer in one-pot synthesis.

关键词： Polycarbonate Phosphonium borane Lewis pair CO_(2)utilization Organocatalysis Ring-opening polymerization

A cytotoxic compound from the leaves of Juglans mandshurica

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Chinese Chemical Letters 2007年第7期18卷 846-848页

作者： zhi bo li Yong Ming Bao Hong bo Chen Jing Yun Wang Jie Han Hu li Jia An Department of Bioscience and Biotechnology Dalian University of Technology Dalian 116024 China School of Chemical Engineering Dalian University of Technology Dalian 116024 China Dalian Institute of Chemical Physics The Chinese Academy of Sciences Dalian 116011 China

From Juglans mandshurica leaves, a new quinone compound was isolated through bioassay-guided fractionation. The structure elucidation of the compound was established based on spectroscopic studies, notably of the 2D NMR spectra. The compound exhibited moderate cytotoxic activities against Hela, MCF-7, BGC823 and 3T3-Llcell lines with IC50 ranges from 7.5 to 26.8 μmol/L.

关键词： Juglans mandshurica p-Hydroxymethoxybenzobijuglone Cytotoxicity

Bimetallic Aluminum Complexes Supported by Bis(salicylaldimine) ligand: Synthesis, Characterization and Ring-opening Polymerization of Lactide

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Chinese Journal of Polymer Science 2018年第2期36卷 149-156页

作者： Tong Shi Quan-De Zheng Wei-Wei Zuo Shao-Feng liu zhi-bo li Key Laboratory of Biobased Polymer Materials Shandong Provincial Education Department School of Polymer Science and Engineering Qingdao University of Science and Technology State Key Laboratory for Modification of Chemical Fibers and Polymer Materials Donghua University

Two types of bifunctional bis（salicylaldimine） ligands（syn-L and anti-L） were designed and synthesized to support bimetallic aluminum complexes. Owing to the rigid anthracene skeleton, syn-L and anti-L successfully locked two Al centers in close proximity（syn-Al2） and far apart（anti-Al2）, respectively. The distance between two Al centers in syn-Al2 was defined by X-ray diffraction as 6.665 ？, which is far shorter than that in anti-Al2. In the presence of stoichiometrical Bn OH, syn-Al2 and anti-Al2 were both efficient for ring-opening polymerization（ROP） of rac-LA with the former being more active. In the presence of excess Bn OH, syn-Al2 showed an efficient and immortal feature, consistent with high conversions, matched Mns, narrow molecular weight distributions and end group fidelity, while anti-Al2 had a much lower activity or even became entirely inactive due to rapid decomposition, indicated by in situ ～1H-NMR experiments of Al complexes with Bn OH.

关键词： Bimetallic catalyst Aluminum complex Ring-opening polymerization Immortal polymerization Polyester

Synthetic Two-dimensional Organic Structures

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Chinese Journal of Polymer Science 2018年第4期36卷 425-425,426-444页

作者： Hui liu Xiao-Nan Kan Chen-Yu Wu Qing-Yan Pan zhi-bo li Ying-Jie Zhao Qingdao University of Science and Technology Qingdao 266042China Centre for Advanced Macromolecular Design School of Chemical EngineeringThe University of New South WalesSydneyNSW2052Australia

Synthetic two-dimensional（2 D） polymers have totally different topology structures compared with traditional linear or branched polymers. The peculiar 2 D structures bring superior properties. Although, from linear to 2 D polymers, the study of these new materials is still in its infancy, they already show potential applications especially in optoelectronics, membranes, energy storage and catalysis, etc. In this review, we summarize the recent progress of the 2 D materials from three respects：（1） Chemistry—different types of polymerization reactions or supramolecular assembly to construct the 2 D networks were described;（2） Preparation methods—surface science, crystal engineering approaches and solution synthesis were introduced;（3） Functionalization and some early applications.

关键词： Two-dimensional structures Interracial synthesis 2D crystal Covalent organic frameworks (COFs) Supramolecular assembly

Neutron irradiation influence on high-power thyristor device under fusion environment

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Nuclear Science and Techniques 2024年第4期35卷 65-81页

作者： Wei Tong Hua li Meng Xu zhi-Quan Song bo Chen School of Electrical Engineering and Automation Hefei University of TechnologyHefei 230009China Institute of Plasma Physics Hefei Institutes of Physical ScienceChinese Academy of SciencesHefei 230031China University of Science and Technology of China Hefei 230026China

Because of their economy and applicability,high-power thyristor devices are widely used in the power supply systems for large fusion *** high-dose neutrons produced by deuterium–tritium(D–T)fusion reactions are irradiated on a thyristor device for a long time,the electrical characteristics of the device change,which may eventually cause irreversible *** this study,with the thyristor switch of the commutation circuit in the quench protection system(QPS)of a fusion device as the study object,the relationship between the internal physical structure and external electrical parameters of the irradiated thyristor is ***,a series of targeted thyristor physical simulations and neutron irradiation experiments are conducted to verify the accuracy of the theoretical *** addition,the effect of irradiated thyristor electrical characteristic changes on the entire QPS is studied by accurate simulation,providing valuable guidelines for the maintenance and renovation of the QPS.

关键词： Fusion device Neutron irradiation effects Thyristor Quench protection