Results 221 to 230 of about 3,294 (264)

High pressure dilatometry on polybutene-1

Colloid and Polymer Science, 1983
High pressure dilatometry is used to study the melting processes and the melt of isotactic polybutene-1. Evaluating a great number of isobaricV(T)-curves determined in the range of a few hundred bar the pressure dependence of the melting temperature is accurately determined for modifications I and II.
U. Leute, W. Dollhopf
openaire   +2 more sources

Morphological Evidence for the Two-Step II–I Phase Transition of Isotactic Polybutene-1

Macromolecules, 2019
Thin films of isotactic polybutene-1 (iPBu) with large lathlike flat-on form II crystals were prepared by isothermal crystallization from melt at 105 °C.
Rui Xin, Zhixin Guo, Yunpeng Li, Xiaoli Sun, Meiling Xue, Jie Zhang, Shouke Yan   +6 more
semanticscholar   +1 more source

Deformation of polybutene-1 crystal aggregates

Journal of Macromolecular Science, Part B, 1970
Abstract The plastic deformation of polybutene-1 crystals on a uniaxially drawn substrate has been studied using an electron microscope. Crystals with hexagonal morphology and crystal structure, with orthorhombic structure and with square morphology were investigated.
D. R. Morrow, A. E. Woodward
openaire   +2 more sources

Spontaneous Form II to I Transition in Low Molar Mass Polybutene-1 at Crystallization Temperature Reveals Stabilization Role of Intercrystalline Links and Entanglements for Metastable Form II Crystals

Macromolecules, 2018
As for the solid–solid transformation from form II to form I in polybutene-1, the intercrystalline links in amorphous phase and the temperature difference between crystallization and phase transition were thought to be essential in previous studies for ...
Yongna Qiao, Fei Yang, Ying Lu, Peiru Liu, Yue-sheng Li, Yongfeng Men   +5 more
semanticscholar   +1 more source

Thermally Induced Phase Transition of Polybutene-1 from Form I′ to Form II through Melt Recrystallization: Crucial Role of Chain Entanglement

Macromolecules, 2023
Lingling Ni, Chenxuan Sun, Shanshan Xu, Wangkai Xiang, Yong-Ze Pan, Bao Wang, Ying Zheng, Chengtao Yu, Pengju Pan   +8 more
semanticscholar   +1 more source

ATACTIC POLYBUTENE: FRACTIONATION AND OSMOTIC PRESSURE

1967
ABSTRACT The fractionation of atactic polybutene by fractional precipitation is described here. The dispersity of fractions was controlled by both viscometric and osmotic measurements.
G. Moraglio, G. Gianotti
openaire   +2 more sources

Identifying a Mesomorphic Boundary Zone within Polybutene-1 Single Crystals Emerging During a Crystal–Crystal Transformation

Macromolecules, 2023
Jinlong Chen, Binghua Wang, Changyu Shen, Jingbo Chen, G. Reiter, Bin Zhang   +5 more
semanticscholar   +1 more source

Retardance of Form II to Form I Transition in Polybutene-1 at Late Stage: A Proposal of a New Mechanism

, 2018
The retardation of polybutene-1 form II to form I transition in the late stage has been investigated by means of time-resolved wide-angle X-ray diffraction.
Yongna Qiao, Hai Wang, Yongfeng Men
semanticscholar   +1 more source

Stretching-Induced Melting and Recrystallization Polymorphism Revealed in Polybutene-1

Macromolecules, 2023
Wei Li, Dai Zhang, Chunjing Qv, Rui-Xiong Zhao, Zhenzhen Ma   +4 more
semanticscholar   +1 more source

Memory Effect on the Form II to I Phase Transition of Isotactic Polybutene-1 in a Flow Field

Macromolecules, 2023
Wenjia Wei, Lincheng Ji, Heng Zhang, Yuru Zhang, Fengmei Su, Chuntai Liu   +5 more
semanticscholar   +1 more source