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Strong Memory Effect of Metastable beta Form Trans-1,4-Polyisoprene above Equilibrium Melting Temperature
Lu, Jie1,2; Yang, Haoran1,2; Ji, Youxin1,2; Li, Xiangyang3; Lv, Yankun1,2; Su, Fengmei1,2; Li, Liangbin1,2
2017-10-01
发表期刊MACROMOLECULAR CHEMISTRY AND PHYSICS
卷号218期号:20页码:1-6
摘要The memory effect of metastable form crystals of trans-1,4-polyisoprene (TPI) is investigated with its thermodynamically stable -TPI as reference. Unexpectedly, -TPI exhibits a stronger memory effect over -TPI. The memory temperature of -TPI can be 20 degrees C higher than its equilibrium melting point (78 degrees C), while -TPI has lost memory below the equilibrium melting point (87 degrees C). Moreover, the ordered structures in -TPI memorized melt accelerate spherulite growth, and the growth rate depends on melting time, similar to previous mesomorphic isotactic polypropylene studies, implying metastable phase may have universal memory effects: wide memory temperature range, crystal nucleation and growth accelerating. The higher memory temperature of metastable phase may be from weak entropic difference with isotropic melt, which cannot overcome the barrier from entanglements as thermodynamically stable phase, leading to slow relaxation. This discovery can regulate crystalline morphologies of polymers by controlling the locations of different form crystals.
文章类型Article
关键词Memory Effect Metastable Phase Trans-1 4-polyisoprene
WOS标题词Science & Technology ; Physical Sciences
资助者National Natural Science Foundation of China(51325301 ; 51227801 ; 51633009 ; 51303166) ; National Natural Science Foundation of China(51325301 ; 51227801 ; 51633009 ; 51303166)
DOI10.1002/macp.201700235
关键词[WOS]ISOTHERMAL CRYSTALLIZATION ; ISOTACTIC POLYPROPYLENE ; SEMICRYSTALLINE POLYMERS ; SINGLE-CRYSTALS ; SELF-NUCLEATION ; COPOLYMERS ; MORPHOLOGY ; KINETICS ; BEHAVIOR ; BLENDS
收录类别SCI
语种英语
资助者National Natural Science Foundation of China(51325301 ; 51227801 ; 51633009 ; 51303166) ; National Natural Science Foundation of China(51325301 ; 51227801 ; 51633009 ; 51303166)
WOS研究方向Polymer Science
WOS类目Polymer Science
WOS记录号WOS:000413354700008
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文献类型期刊论文
条目标识符http://ir.hfcas.ac.cn:8080/handle/334002/33827
专题应用技术研究所
作者单位1.Univ Sci & Technol China, Natl Synchrotron Radiat Lab, Hefei 230029, Anhui, Peoples R China
2.Univ Sci & Technol China, CAS Key Lab Soft Matter Chem, Hefei 230029, Anhui, Peoples R China
3.Chinese Acad Sci, Inst Appl Technol, Key Lab Novel Thin Film Solar Cells, Hefei Inst Phys Sci, Hefei 230088, Anhui, Peoples R China
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Lu, Jie,Yang, Haoran,Ji, Youxin,et al. Strong Memory Effect of Metastable beta Form Trans-1,4-Polyisoprene above Equilibrium Melting Temperature[J]. MACROMOLECULAR CHEMISTRY AND PHYSICS,2017,218(20):1-6.
APA Lu, Jie.,Yang, Haoran.,Ji, Youxin.,Li, Xiangyang.,Lv, Yankun.,...&Li, Liangbin.(2017).Strong Memory Effect of Metastable beta Form Trans-1,4-Polyisoprene above Equilibrium Melting Temperature.MACROMOLECULAR CHEMISTRY AND PHYSICS,218(20),1-6.
MLA Lu, Jie,et al."Strong Memory Effect of Metastable beta Form Trans-1,4-Polyisoprene above Equilibrium Melting Temperature".MACROMOLECULAR CHEMISTRY AND PHYSICS 218.20(2017):1-6.
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