Results 141 to 150 of about 27,269,029 (232)

Autoclave foaming and steam-chest molding of polypropylene/polybutene-1 blend bead foams and their crystallization and mechanical properties

Journal of cellular plastics (Print), 2023
Expanded polypropylene (EPP) foams have showed wide applications in our daily life, such as automotive and packaging. Usually, autoclave foaming combined with steam-chest molding is the main artwork to prepare the high-precision EPP foam products ...
X. Lan, Pengke Huang, Yunkai Chong, Fei Wu, Yaozhuo Su, Haibin Luo, Partrick C. Lee, Wenge Zheng   +7 more
semanticscholar   +1 more source

The heat of fusion of polybutene‐1

Journal of Polymer Science Part B: Polymer Physics, 1986
AbstractThrough x‐ray diffraction, the changes in the unit‐cell parameters of crystal forms I and II of polybutene‐1 were followed from room temperature to the melting point. These data were combined with the results of other measurements to computer the heats and entropies of fusion by use of the Clapeyron equation.
Howard W. Starkweather Jr., Glover A. Jones   +1 more
openaire   +1 more source

Crystallization and Transformation of Polybutene‐1

Journal of Macromolecular Science, Part B, 2004
Abstract The isothermal crystallization and phase II → I transformation of bulk polybutene‐1 at various temperatures have been characterized by x‐ray diffraction. The crystallization rate can be increased or decreased by the addition of various solids, with sodium salicylate and talc, e.g., increasing the rate by >100% and, unexpectedly, decreasing the
M. Kaszonyiova, F. Rybnikar, P. H. Geil
openaire   +1 more source

Spherulite deformation in polybutene‐1

Journal of Polymer Science Part B: Polymer Letters, 1963
Abstract : The postulate of spherulite deformation has now been verified by direct microscopic observation. Films of polybutene-1, about 1 mil thickness, (made from samples obtained through the courtesy of Phillips Petroleum Company) were prepared by molding in a laboratory press at 150 C for 15 min at 2,000 psi pressure and then lowering the ...
K. Sasaguri, M. B. Rhodes, R. S. Stein
openaire   +1 more source

Deformation of polybutene‐1 spherulites

Journal of Polymer Science Part A-2: Polymer Physics, 1967
AbstractThe deformation of fresh and aged polybutene‐1 spherulitic samples has been investigated by microscopic observation, interferometry, studying macroscopic and spherulitic birefringence changes, and study of light‐scattering patterns. The spherulite deformation is not affine, the microscopic deformation ratio being less than the macroscopic ...
Rena Yang, R. S. Stein
openaire   +1 more source

Change of lamellar morphology upon polymorphic transition of form II to form I crystals in isotactic Polybutene-1 and its copolymer

, 2021
Morphology and domain sizes in isotactic polybutene-1 homopolymer (iPB-1) and (butene-1)-ethylene random copolymer (iPB-1/C2) are studied by spin-diffusion time-domain 1H NMR and SAXS experiments. Lamellar thickness is smaller for iPB-1/C2 than for iPB-1
Yanan Qin, V. Litvinov, Walter Chassé, Bin Zhang, Yongfeng Men   +4 more
semanticscholar   +1 more source

Chain dimension and crystallization temperature affected II-I transition of isotactic polybutene-1

CrysteEngComm, 2022
Isotactic polybutene-1 (iPB-1) usually crystallizes into Form II from melt first and then spontaneously transforms into Form I that with outstanding properties.
Xiaopeng Cui, Jian-Nan Huo, Tongxin Lv, Cunliang Hu, Hong-fei Li, Binyuan Liu, Shichun Jiang   +6 more
semanticscholar   +1 more source

Modeling of creep and recovery behaviors of isotactic polybutene‐1 melt

Polymer Engineering & Science
Isotactic polybutene‐1 (iPB‐1) has been widely used in various industrial and construction fields due to its excellent performances such as high‐temperature creep resistance, long‐term internal pressure resistance, and slow crack growth performance ...
Xiaoyu Sun, Jingqing Li, Shichun Jiang
semanticscholar   +1 more source

Glass-Transition-Temperature-Independent Form II to I Phase Transition of Low-Molar-Mass Isotactic Polybutene-1

, 2021
Temperature-dependent form II to I transition in isothermally crystallized low-molar-mass polybutene-1 has been investigated by means of fast scanning calorimetry.
Peiru Liu, Yongfeng Men
semanticscholar   +1 more source

Effect of polymorphism of isotactic polybutene‐1 on peel behavior of polyethylene/polybutene‐1 peel systems

Journal of Applied Polymer Science, 2007
AbstractThe effect of polymorphism of isotactic polybutene‐1 (iPB‐1) on the peel behavior of the specific peel system low‐density polyethylene/polybutene‐1 (LDPE/iPB‐1) was investigated using wide‐angle X‐ray scattering, calorimetry, and the T‐peel test.
Michael Nase, René Androsch, Beate Langer, Hans Joachim Baumann, Wolfgang Grellmann   +4 more
openaire   +1 more source