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Chinese Journal of Polymer Science 2024年第6期42卷 775-786页

作者： Shuang-Cheng Li Wei-Jia Zhou Wen-Jie Wu Jun Shao Shui-Liang Chen Hao-Qing Hou Sheng Xiang College of Chemistry&Chemical Engineering and Nanofiber Engineering Center of Jiangxi Province Jiangxi Normal UniversityNanchang330022China National Engineering Research Center for Carbohydrate Synthesis/Key Lab of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education Jiangxi Normal UniversityNanchang330022China Wenzhou Institute University of Chinese Academy of SciencesWenzhou325001China

For a polymer/polymer dismissible blend with two crystallizable components,the crystallization behavior of different components and the reciprocal influences between different crystals are interesting and important,but did not investigate in *** this study,the L-poly(lactic acid)/polypropylene(PLLA/PP)blends with different weight ratios were prepared by melt mixing and the crystallization behavior of the blends were *** showed that the crystalline structures of PLLA and PP were not altered by the *** the crystallization of PLLA,both the diffusion of chain segments and crystallization rate were enhanced under the existence of PP *** the crystallization of PP,its crystallization rate was depressed under the existence of amorphous PLLA molecular *** the PP crystallized from the existence of PLLA crystals,although the diffusion rate of PP was reduced by PLLA crystals,the nucleation positions were obviously enhanced,which accelerated the formation of PP *** investigation would supply more basic data for the application of PLLA/PP blend.

关键词： L-poly(lactic acid) Polypropylene Blends Crystalization behavior Crystallization acceleration

一种新的无催化剂条件下的2,3-喹啉二羧酸酯的合成

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有机化学 2018年第2期38卷 504-508页

作者：王彬叶文波晏子聪万常峰侯豪情汪志勇江西师范大学化学化工学院南昌330022 中国科学技术大学化学系合肥230026

无催化剂条件下,利用邻氨基二苯甲酮衍生物和丁炔二酸酯作为反应原料,二甲基亚砜(DMSO)作为溶剂,高效地构建2,3-喹啉二羧酸酯类化合物.并且根据反应的结果,对可能的反应机理进行了初步的探究.

关键词：喹啉衍生物无催化剂绿色合成

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一种新的肉桂酸类化合物的脱羧/甲基化反应

化学学报 2018年第2期76卷 99-102页

作者：叶文波晏子聪万常峰侯豪情汪志勇江西师范大学化学化工学院南昌330022 中国科学技术大学微尺度物质科学国家实验室合肥230026

近年来,脱羧反应得到了广泛而深入的研究.肉桂酸类化合物的脱羧串联反应也得到了较多的关注.这类反应一般包括两个过程,自由基加成和羧基的脱去,从而在苯环的侧链引入各种各样的官能团.我们在研究过程中发现,在碳酸钾作为碱,过氧叔丁醇... 详细信息

近年来,脱羧反应得到了广泛而深入的研究.肉桂酸类化合物的脱羧串联反应也得到了较多的关注.这类反应一般包括两个过程,自由基加成和羧基的脱去,从而在苯环的侧链引入各种各样的官能团.我们在研究过程中发现,在碳酸钾作为碱,过氧叔丁醇作为氧化剂,以二甲基亚砜(DMSO)/水作为混合溶剂条件下(体积比为1∶1),肉桂酸类衍生物能够转化成苯丙酮类化合物.通过对反应机理的研究,产物中的甲基来自于过氧叔丁醇,反应经过自由基加成和进一步脱羧得到产物.该反应特点是没有用过渡金属盐作为催化剂,并且是在水相中反应,因此符合绿色化学的发展要求.

关键词：脱羧串联反应甲基化苯丙酮类绿色化学

The Crystallization and Melting Behaviors of PDLA-b-PBS-b-PDLA Tri-block Copolymers

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Chinese Journal of Polymer Science 2020年第3期38卷 298-310,I0008页

作者： Cong-Shu Feng Yun Chen Jun Shao Gao Li Hao-Qing Hou College of chemistry and chemical engineering Jiangxi Normal UniversityNanchang 330022China Jiangxi Key Laboratory of Organic Chemistry Jiangxi Science and Technology Normal UniversityNanchang 330013China Key Laboratory of Polymer Ecomaterials Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China

In this study,the poly(D-lactide)-block-poly(butylene succinate)-block-poly(D-lactide)(PDLA-b-PBS-b-PDLA)triblock copolymers with a fixed length of PBS and various lengths of PDLA are synthesized,and the crystallization behaviors of the PDLA and PBS blocks are *** both the crystallization behaviors of PBS and PDLA blocks depend on composition,they exhibit different *** the PDLA block,its crystallization behaviors are mainly influenced by temperature and block *** crystallization signals of PDLA block appear in the B-D 2-2 specimen,and these signals get enhanced with PDLA block *** crystallization rates tend to decrease with increasing PDLA block lendth during crystallizing at 90 and 100°*** at higher temperature,the crystallization rates increase at first and then decrease with block *** crystallization rates decrease as elevating the crystallization *** melting temperatures of PDLA blocks increase with block lengths and crystallization *** the PBS block,its crystallization behaviors are mainly controlled by the nucleation and confinement from PDLA *** crystallization and melting enthalpies as well as the crystallization and melting temperatures of PBS block reduce as a longer PDLA block has been copolymerized,while the crystallization rates of the PBS block exhibit unique component dependence,and the highest rate is observed in the B-D 2-2 *** Avrami exponent of PBS crystallites is reduced as a longer PDLA block is incorporated or the sample is crystallized at higher *** investigation provides a convenient route to tune the crystallization behavior of PBS and PLA.

关键词： Poly(butylenes succinate)(PBS) Poly(D-lactide)(PDLA) Poly(D-lactide)-block-PBS-block-poly(D-lactide)(PDLA-b-PBS-b-PDLA) Crystallization behavior

A Facile Strategy to Enhance the Formation of Stereocomplex Crystallites in Poly(L-lactic acid)/Poly(D-lactic acid) Blend with High Molecular Weights

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Chinese Journal of Polymer Science 2023年第7期41卷 1115-1122页

作者： Chan-Na Zhong Ya-Dong Liu Juan Tang Wei-Shuo Chen Shuang-Cheng Li Jun Shao Hao-Qing Hou College of Chemistry&Chemical Engineering and Nanofiber Engineering Center of Jiangxi Province Jiangxi Normal UniversityNanchang330022China Key Laboratory of Polymer Ecomaterials Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun130022China National Engineering Research Center for Carbohydrate Synthesis/Key Lab of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education Jiangxi Normal UniversityNanchang330022China

Blending of poly(levorotatory-lactic acid) (PLLA) and poly(dextrorotatory-lactic acid) (PDLA) produces the stereocomplex crystallites (PLA SC), which present higher melting temperature and mechanical properties than that of neat PLLA or PDLA. However, in the PLLA/PDLA blends with higher molecular weights, the phase separation occurs and the SC exhibits weak memory after melting, which lead to a small amount of SC together with a large amount of homochiral crystallites (HC) develop during crystallization from the melt. In this study, a small content of graphite oxide was blended with PLLA and PDLA to form ternary blends, and it was exciting to find that the formation of SC was enhanced gradually with the content of graphite oxide. The SC exclusively developed when 2 wt% graphite oxide was incorporated into the PLLA/PDLA, and the crystallinity with ∼50% was received even during fast cooling from the melt (−50 ℃/min). The acceleration formation of SC was speculated due to the interaction between PLA molecular chains and the hydroxyl groups on the surface of graphite oxide and the obstruction of proliferation of graphite oxide.

关键词： Poly(lactic acid)stereocomplex Graphite oxide Crystallization behavior Melt memory