Effect of crystallization temperature and propylene sequence length on the crystalline structure of propylene-ethylene random copolymers

Gou, Qingqiang; Li, Huihui; Yu, Zhen‐Qiang; Chen, ErQiang; Zhang, Yudong; Yan, Shouke

doi:10.1007/s11434-008-0252-2

Cited by 5 publications

(6 citation statements)

References 26 publications

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“…The molecular parameters, such as molecular weight, chain architecture, stereoregularity, etc., also exhibit great influence on the polymorphism selection [ 10 , 13 , 14 , 75 , 76 , 77 , 78 , 79 ]. De Rosa et al [ 80 , 81 , 82 ] have studied the effect of the molecular weight, stereo- and regiodefects on the polymorphic behavior of melt-crystallized iPB.…”

Section: Crystal Structural Control Of Ipbumentioning

confidence: 99%

“…Polymorphism of polymers, namely crystallization of a given polymer into different crystal structures, is aubiquitous phenomenon in material science [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 ]. As examples, the poly(vinylidene fluoride) exhibit five crystalline modifications [ 6 , 7 , 8 , 9 ], while the isotactic poly(1-butene) (iPBu) present at least four known structures [ 16 , 17 ].…”

Section: Introductionmentioning

confidence: 99%

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Polymorphic Behavior and Phase Transition of Poly(1-Butene) and Its Copolymers

et al. 2018

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The properties of semicrystalline polymeric materials depend remarkably on their structures, especially for those exhibiting a polymorphic behavior. This offers an efficient way to tailor their properties through crystal engineering. For control of the crystal structure, and therefore the physical and mechanical properties, a full understanding of the polymorph selection of polymers under varied conditions is essential. This has stimulated a mass of research work on the polymorphic crystallization and related phase transformation. Considering that the isotactic poly(1-butene) (iPBu) exhibits pronounced polymorphs and complicated transition between different phases, the study on its crystallization and phase transformation has attracted considerable attention during the past decades. This review provides the context of the recent progresses made on the crystallization and phase transition behavior of iPBu. We first review the crystal structures of known crystal forms and then their formation conditions and influencing factors. In addition, the inevitable form II to form I spontaneous transition mechanism and the transformation kinetics is reviewed based on the existing research works, aiming for it to be useful for its processing in different phases and the further technical development of new methods for accelerating or even bypass its form II to form I transformation.

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Section: Crystal Structural Control Of Ipbumentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Polymorphic Behavior and Phase Transition of Poly(1-Butene) and Its Copolymers

et al. 2018

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“…With increasing comonomer content, an increase in the γ-fraction is observed [41][42][43][44]. Interestingly, αand γ-crystals form within the same spherulites [18,22,[44][45][46], whereas β-and mesophase form separate spherulites and nodules, respectively [8,39,47]. In general it is accepted that γ-phase cross nucleates on α lamellae [44,48], meaning that in order to grow γ-crystals, α crystals must be formed first.…”

Section: Multi-phase Crystallization At Ambient Pressurementioning

confidence: 99%

An experimentally validated model for quiescent multiphase primary and secondary crystallization phenomena in PP with low content of ethylene comonomer

Caelers

Cock

Looijmans

et al. 2022

Polymer

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“…The presence of ethylene units reduces the melting point and crystallinity by introducing irregularities into the main polymeric chain. The advantages of this class of polymers are improved transparency, relative softness, lower sealing temperature, and moderate low-temperature impact strength due to the lowered glass-transition temperature [13][14][15].…”

Section: Introductionmentioning

confidence: 99%

The Effect of Cooling Rate during Crystallization on the Melting Behavior of Polypropylenes of Different Chemical Structure

Lukanina¹,

Хватов²,

Kolesnikova³

et al. 2016

ChChT

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Abstract. The melting behavior of polypropylenes of different chemical structure (isotactic homopolypropylene, propylene-based block and random copolymers and maleic anhydride grafted polypropylene) was studied by differential scanning calorimeter (DSC) and optical microscopy. Melting behavior and the crystal structure of polypropylene and its copolymers were observed depending on the crystallization rate, chemical nature of co-monomer unites and regularity of co-monomer units arrangement in the polypropylene main chain.

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Effect of crystallization temperature and propylene sequence length on the crystalline structure of propylene-ethylene random copolymers

Cited by 5 publications

References 26 publications

Polymorphic Behavior and Phase Transition of Poly(1-Butene) and Its Copolymers

Polymorphic Behavior and Phase Transition of Poly(1-Butene) and Its Copolymers

An experimentally validated model for quiescent multiphase primary and secondary crystallization phenomena in PP with low content of ethylene comonomer

The Effect of Cooling Rate during Crystallization on the Melting Behavior of Polypropylenes of Different Chemical Structure

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