Results 61 to 70 of about 304,137 (289)

Crystallization and Mechanical Properties of Polypropylene under Processing-Relevant Cooling Conditions with respect to Isothermal Holding Time

International Journal of Polymer Science, 2016
For semicrystalline thermoplastics, aside from pressure and shear, the temperature-time behavior while cooling the melt significantly affects the geometry and degree of ordered structures (e.g., spherulite size, degree of crystallization, and crystal ...
Christopher Fischer, Dietmar Drummer
doaj   +1 more source

Non-isothermal Crystallization Kinetics of Thermoplastic Composite for Automated Fiber Placement

Cailiao gongcheng, 2018
The non-isothermal crystallization kinetics of glass fiber reinforced polypropylene for automated fiber placement was studied by differential scanning calorimetry (DSC) and Avrami equation. To investigate the influence of cooling rate and cooling time on
SONG Qing-hua, XIAO Jun, WEN Li-wei, WANG Xian-feng, ZHAO Cong, CHU Qi-yi   +5 more
doaj   +1 more source

Resolving and Controlling Silicoaluminophosphate Zeolite Intergrowths and Mixtures

Advanced Science, EarlyView.
Low‐dose electron microscopy enables atomic‐resolution imaging of beam‐sensitive SAPO‐34/18 intergrowths, revealing their stacking sequences and spatial distributions under controlled Si content and SDA ratio. This work establishes a methodology linking controllable synthesis with atomic‐resolution microscopy to investigate structure–property ...
Yuxin Ke, Jiale Feng, Lei Wang, Xiao Chen, Mengmeng Ma, Jiabin Cui, Juan Diwu, Yuman Liu, Fei Wei, Boyuan Shen, Bin Song   +10 more
wiley   +1 more source

Non-isothermal crystallization and melting of ethylene-vinyl acetate copolymers with different vinyl acetate contents

eXPRESS Polymer Letters, 2008
Non-isothermal crystallization and subsequent melting of three grades of ethylene-vinyl acetate copolymer were investigated by differential scanning calorimetry (DSC) technique. The DSC crystallization curves show that vinyl acetate (VAc) content has the
doaj   +1 more source

Cooling rate effects on the crystallization kinetics of polypropylene/date palm fiber composite materials

Science and Engineering of Composite Materials, 2016
Non-isothermal crystallization kinetics of polypropylene/date palm fiber (PP/DPF) composite materials were investigated in this study, using the differential scanning calorimetry (DSC) method.
Boukettaya Sonia, Seddique Waseem Al, Alawar Ahmad, Daly Hachmi Ben, Hammami Adel   +4 more
doaj   +1 more source

Isothermal and non-isothermal crystallization kinetics of a polyglycolide copolymer having a tricomponent middle soft segment

, 2014
Kinetics of isothermal and non-isothermal crystallization studies of a biodegradable monofilament suture constituted by polyglycolide hard blocks and soft segments derived from glycolide, epsilon-caprolactone and trimethylene carbonate have been ...
Puiggalí Bellalta, Jordi, Turón Dols, Pau, Franco García, María Lourdes, Márquez Lobato, Yolanda   +3 more
core   +1 more source

High‐Entropy Engineering and External Magnetic Field Modulation Synergistically Enhance the H2S Sensing Performance of Rare‐Earth Perovskite Ferrites

Advanced Science, EarlyView.
A novel high‐entropy perovskite oxide, (Gd0.2Tb0.2Dy0.2Ho0.2Er0.2)FeO3, was successfully synthesized for advanced hydrogen sulfide gas detection. By synergistically coupling high‐entropy‐induced local lattice distortion with weak magnetic field modulation, the tailored material generates abundant active sites. This innovative dual strategy dramatically
Yunfei Wang, Min Zhang, Rui Li, Xiaolong Yao, Zhaofeng Wu, Fengdong Qu, Shan Qiu, Zhenjiang Li   +7 more
wiley   +1 more source

Determination of non-isothermal crystallization rate constant for pseudo-experimental calorimetric data

Materials Research, 2009
In the present work, non-isothermal crystallization data in the form of heat flow vs. temperature curves were generated using the Nakamura Model and its typical parameters reported in the literature for polypropylene. The values obtained for these curves
Viviane Verona Galera, Alessandra Lucas Marinelli, Benjamim de Melo Carvalho   +2 more
doaj   +1 more source

Non-isothermal crystallization of polyvinylalcohol-co-ethylene [PDF]

, 2005
Non-isothermal crystallization of polyvinylalcohol-co-ethylene with different ethylene contents was studied. Several models were used to predict the crystallization behavior of these materials under non-isothermal conditions at a constant cooling rate ...
V. Alvarez, P. Stefani, Alvarez, Vera Alejandra, Vázquez, Analía, A. Vázquez, Stefani, Pablo Marcelo, Cisilino, Adrian Pablo, Ortiz, Jhonny E.   +7 more
core   +1 more source

Polymer‐Grafted Cu(II) Metal–Organic Polyhedra as Scalable, Melt‐Processable Porous Materials

Advanced Science, EarlyView.
The use of a direct synthetic route to obtain polymer‐grafted Cu(II)‐based metal–organic polyhedra gives rise to a low‐cost and scalable cage. This material combines low‐temperature melting, achieving phase changes while preserving cage integrity, and high CO2 uptake exceeding 0.6 mmol g−1.
Alba Cortés‐Martínez, Francisco Sánchez‐Férez, José A. Suárez del Pino, Sergio Royuela, Félix Zamora, Daniel Maspoch, Arnau Carné‐Sánchez   +6 more
wiley   +1 more source