Non-isothermal melt crystallization kinetics of anhydrite-filled polypropylene composites

Wang, Shaohui; Xu, Weibing; Zhou, Zhengfa; Ren, Fengmei

doi:10.1007/s11595-010-1012-0

Cited by 7 publications

(2 citation statements)

References 22 publications

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“…Figure 5 and Table 2 showed that the exothermic trace of the two samples became wider, the crystallization peak temperature( T p ) shifted to lower temperature and the crystallization exothermic heat became smaller as the cooling rate increased which are identical with the conclusion drawn by Zhang et al [10], Wang et al [11], and Supaphol et al [12]. This can be explained that at high cooling rate, there is an abrupt increase in polymer melt viscosity, i.e., the moving ability of the segments became worse, thus, the segments need longer time to enter the lattice, so T p shifted to lower temperature.…”

Section: Resultssupporting

confidence: 83%

Structure, nonisothermal crystallization behavior, and thermal property study of poly(trimethylene terephthalate)/cellulose acetate butyrate blends

Wang

Chen

et al. 2012

Polymer Engineering & Sci

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Poly(trimethylene terephthalate) (PTT)/cellulose acetate butyrate (CAB) blends were prepared by melting blending through a co‐rotating twin screw extruder. The structures of PTT/CAB blends were characterized by scanning electron microscope (SEM) and Fourier transform infrared (FTIR) spectra, and the results showed that CAB phase dispersed homogeneously in the PTT matrix and there existed evident phase interface between PTT and CAB. The nonisothermal crystallization behavior was investigated by differential scanning calorimetry (DSC) and was described with modified Avrami equation of Jeziorny and Mo equation, respectively. The results indicated that the half crystallization time (t1/ 2) is much shorter, the nonisothermal crystallization kinetic rate constant (Zc) is bigger at a given cooling rate, the cooling rate [Fz(T)] is smaller at a given relative crystallinity (X t) of PTT/CAB blends than those of PTT, which proved that the addition of CAB improved the crystallization of PTT and made PTT crystallize more perfect and faster than pure PTT. In addition, thermogravimetric analysis (TGA) curves of PTT and PTT/CAB blends showed that effects of CAB content on the thermal decomposition of PTT/CAB blends were little. POLYM. ENG. SCI., 2012. © 2012 Society of Plastics Engineers

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Section: Resultssupporting

confidence: 83%

Structure, nonisothermal crystallization behavior, and thermal property study of poly(trimethylene terephthalate)/cellulose acetate butyrate blends

Wang

Chen

et al. 2012

Polymer Engineering & Sci

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“…25 If the p-n junction is the working junction, the V oc should be determined by the difference between the Fermi level of the nanocrystals and TiO 2 . 32 In order to make a sound comparison, polymers with different HOMO levels and nanocrystals with different Fermi levels are selected. Fig.…”

Section: Resultsmentioning

confidence: 99%

Unravelling the working junction of aqueous-processed polymer–nanocrystal solar cells towards improved performance

Chen

Jin

et al. 2016

Phys. Chem. Chem. Phys.

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Hybrid solar cells (HSCs) based on aqueous polymers and nanocrystals are attractive due to their environmental friendliness and cost effectiveness. In this study, HSCs are fabricated from a series of water-soluble polymers with different highest occupied molecular orbital (HOMO) levels and nanocrystals with different Fermi levels. We demonstrate that the working principle of the aqueous-processed HSCs follows a p-n junction instead of a type-II heterojunction. The function of the polymer is to provide an interface dipole which can improve the build-in potential of the HSCs. Subsequently, the aqueous-processed HSCs are optimized following a p-n junction and an improved PCE of 5.41% is achieved, which is the highest for aqueous-processed HSCs. This study will provide instructive guidelines for the development of aqueous-processed HSCs.

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Carbon tube‐gypsum reinforced polypropylene: Impact resistance, thermal stability

Li,

Wang,

Shen

et al. 2024

Polymer Composites

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This study investigated the effect of multi‐walled carbon nanotubes (MWCNTs) and reclaimed gypsum of varying contents on the mechanical properties and thermal stability of polypropylene (PP) composite materials. The results indicated that the incorporation of reclaimed gypsum and MWCNTs powder into PP composites could enhance the tensile strength, impact strength, and bending modulus of PP to a certain extent. The above properties of AGY/MWCNTs/PP composites were increased by 14.6%, 131.8%, and 36.2%, respectively, with the impact properties being significantly affected. Univariate analysis of variance revealed that MWCNTs powder and recycled gypsum exerted a significant impact on the mechanical properties of polypropylene composites. Moreover, the initial weight loss temperature of AGY/MWCNTs/PP demonstrated a notable increase, from 318.71 to 398.48°C, while the maximum weight loss temperature exhibited a comparable rise, from 406.85 to 461.54°C.Highlights The impact performance and thermal stability of polypropylene composite materials have been demonstrably augmented. A synergistic effect between reclaimed gypsum and multi‐walled carbon nanotubes in the reinforcement of polypropylene composites was demonstrated. This provides a theoretical framework and practical guidance for the design and preparation of high‐performance and recyclable polymer composites.

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Non-isothermal melt crystallization kinetics of anhydrite-filled polypropylene composites

Abstract: Fig.5 Plots of ln(-ln(1-X t )) vs lnφfor PP and composite during non-isothermal crystallization process PP/anhydrite: (a) 100/0, (b) 90/10, (c) 80/20, (d) 70/30 Vol.25 No.1 WANG Shaohui et al: Non-isothermal Melt Crystallizatio…

Cited by 7 publications

References 22 publications

Structure, nonisothermal crystallization behavior, and thermal property study of poly(trimethylene terephthalate)/cellulose acetate butyrate blends

Structure, nonisothermal crystallization behavior, and thermal property study of poly(trimethylene terephthalate)/cellulose acetate butyrate blends

Unravelling the working junction of aqueous-processed polymer–nanocrystal solar cells towards improved performance

Carbon tube‐gypsum reinforced polypropylene: Impact resistance, thermal stability

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