4.7 Article

Structure and morphology of isotactic polypropylene-polyethylene block copolymers prepared with living and stereoselective catalyst

相关参考文献

注意:仅列出部分参考文献,下载原文获取全部文献信息。
Article Polymer Science

Crystallization of Propene-Pentene Isotactic Copolymers as an Indicator of the General View of the Crystallization Behavior of Isotactic Polypropylene

Miriam Scoti et al.

Summary: Crystallization of metallocene random propene-pentene isotactic copolymers (iPPC5) reveals that pentene defects shorten regular propene sequences, inducing gamma form crystallization. With increasing pentene concentration, incorporation into alpha and trigonal forms stabilizes them over gamma form, decreasing f(gamma)(max). The relationship between f(gamma)(max) and the average length of regular propene sequences of iPPC5 copolymers fits between that of iPPC4 and iPPC6 copolymers, demonstrating different behaviors among copolymers of iPP with various comonomers.

MACROMOLECULES (2022)

Article Polymer Science

Structure and Morphology of Crystalline Syndiotactic Polypropylene-Polyethylene Block Copolymers

Rocco Di Girolamo et al.

Summary: This study investigates the structure and morphology of diblock copolymers composed of polyethylene (PE) and syndiotactic polypropylene (sPP) with different lengths. The results show that the PE block crystallizes first, followed by the sPP block at a lower temperature. The Small angle X-ray scattering (SAXS) analysis reveals the development of a lamellar morphology with alternating lamellar domains of PE and sPP. At higher temperatures, only PE crystals are formed, resulting in a morphology characterized by stacks of PE lamellae alternating with amorphous layers. At lower temperatures, when sPP crystals are also well-formed, the morphology becomes more complex with alternating amorphous and crystalline layers.

POLYMERS (2022)

Article Polymer Science

Double Crystallization and Phase Separation in Polyethylene-Syndiotactic Polypropylene Di-Block Copolymers

Claudio De Rosa et al.

Summary: Epitaxial crystallization can control the crystalline orientation of blocks, while using different crystalline substrates can define the final morphology. The polymer block that crystallizes first on the substrate has a significant impact on the final morphology of the block copolymers.

POLYMERS (2021)

Article Polymer Science

Mechanical Properties and Morphology of Propene-Pentene Isotactic Copolymers

Claudio De Rosa et al.

MACROMOLECULES (2018)

Article Polymer Science

Yield behavior of random copolymers of isotactic polypropylene

Finizia Auriemma et al.

POLYMER (2017)

Article Nanoscience & Nanotechnology

Controlling Size and Orientation of Lamellar Microdomains in Crystalline Block Copolymers

Claudio De Rosa et al.

ACS APPLIED MATERIALS & INTERFACES (2017)

Article Chemistry, Physical

Expanding the Origin of Stereocontrol in Propene Polymerization Catalysis

Claudio De Rosa et al.

ACS CATALYSIS (2016)

Review Polymer Science

Crystallization assisted self-assembly of semicrystalline block copolymers

Wei-Na He et al.

PROGRESS IN POLYMER SCIENCE (2012)

Review Polymer Science

Living alkene polymerization: New methods for the precision synthesis of polyolefins

Gregory J. Domski et al.

PROGRESS IN POLYMER SCIENCE (2007)

Article Chemistry, Multidisciplinary

Structure-property correlations in polypropylene from metallocene catalysts: Stereodefective, regioregular isotactic polypropylene

C De Rosa et al.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2004)

Article Polymer Science

Polymer crystallization confined in one, two, or three dimensions

YL Loo et al.

MACROMOLECULES (2001)

Article Multidisciplinary Sciences

Microdomain patterns from directional eutectic solidification and epitaxy

C De Rosa et al.

NATURE (2000)