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Crystalline modification of a rare earth nucleating agent for isotactic polypropylene based on its self-assembly Royal Society Open Science 2018 5 (5) 180247 DOI: 10 1098/rsos 180247 Nawadon Petchwattana Phisut Naknaen Jakkid Sanetuntikul Borwon Narupai
Most of the GC generally has some nucleating agent which aid in developing desired crystalline phases by nucleation as well as crystallization followed by growth from mother glass Various nucleating agents which are generally used are TiO 2 ZrO 2 P 2 O 5 Y 2 O 3 and other rare earth oxides TiO 2
Dec 22 2004Jiaqi Wu Changwei Lin Jianlei Liu Lei Han Hua Gui Cui Li Taoyong Liu Anxian Lu The effect of complex nucleating agent on the crystallization phase formation and performances in lithium aluminum silicate (LAS) glasses Journal of Non-Crystalline Solids 10 1016/j jnoncrysol 2019 119486 521 (119486) (2019)
2 nucleating agents fa-vors crystallization and two-dimensional bulk crystal growth However E a increases after adding the CeO 2 agent to the ba-sic ingredient as indicated in Table3for sample C In general the addition of rare-earth oxide to the CAMS-based diopside glass-ceramics has been expected to significantly improve the
In this paper the crystalline modification of a rare earth nucleating agent (WBG) for isotactic polypropylene (PP) based on its supramolecular self-assembly was investigated by differential scanning calorimetry wide-angle X-ray diffraction and polarized optical microscopy
May 01 2019Lithium disilicate glass-ceramic modified by GeO 2 /SiO 2 replacement to give 33 60Li 2 O-5 00GeO 2-61 40SiO 2 (mol%) composition was investigated by the conventional melt technique The effect of adding 0 1 mol of some rare earth oxides like Y 2 O 3 La 2 O 3 or CeO 2 on the crystallization behavior chemical durability Vicker's microhardness and density of the obtained glass-ceramics
(i) nucleating agents and (ii) temperature and time of the heat-treatment influence the size and number of the crystals 4 5 In magnesium-boro-alumino-silicate based glass-ceramic the tun-ing of crystallization has been studied with the doping of nucleating agent such as rare-earth (RE) ions having high ionic
This paper describes the preparation of a transparent glass‐ceramic from the SiO 2 ‐K 2 O‐ZnO‐Al 2 O 3 ‐TiO 2 system containing a single crystalline phase gahnite (ZnAl 2 O 4) TiO 2 was used as a nucleating agent for the heat‐induced precipitation of gahnite crystals of 5‐10 nm The evolution of the ZnAl 2 O 4 spinel structure through the gradual formation of Al‐O bonds was
Yuanming Zhang Tingting Sun Wei Jiang Guangting Han Crystalline modification of a rare earth nucleating agent for isotactic polypropylene based on its self-assembly Royal Society Open Science 10 1098/rsos 180247 5 5 (180247) (2018)
The composite modified polypropylene material has the raw material composition comprising polypropylene 100 weight portions nanometer inorganic material 0 1-10 weight portions elastomer 1-10 weight portions beta-crystal nucleator 0 1-0 5 weight portions antioxidant 0-1 5 weight portions and compatibilizing agent 0 2-3 weight portions
Figures 3(b) and 3(d) show the melting curves of composites and relevant data are listed in Tables 2 and 3 According to DSC curve 2-1 when AA-RCC was added to PP the melting curve has a single peak and is 161 78C However with only WBG being added to PP the DSC curve 1-1 has two peaks and the crystallization peak temperatures are 152 38C and 167 23C respectively
Effect of rare earth β nucleating agent on the properties of polypropylene This paper based on the theories of crystallizition of polyolefin resion introduced nucleating agent and its properties and functions in crystallization modification of polyolefins in a The effect of nucleation agents on the crystalline structure mechanical
The above results clearly indicated that rare earth β-nucleating agent (WBG-II) can effectively induce the main crystalline forms in PP to complete the change from α-forms to β-forms Advanced Materials Research Vol 710 99 For clearing the effect of the different WBG-II adding content on the crystalline of PP the Xc and Kβ values of the
Apr 05 2016In this study a new rare earth β-nucleating agent (WBG-II) which has been synthesized and studied by Feng et al was used to generate rich β-crystalline structure in the injection molding samples with various contents of WBG Three types of β-crystalline morphologies namely β-spherulite bundle-like β-spherulite and leaf-like
In this paper the crystalline modification of isotactic polypropylene (PP) with a rare earth β nucleating agent (WBG) with different ultrasound conditions was investigated by scanning electron microscopy (SEM) wide-angle X-ray diffraction (XRD) and differential scanning calorimetry (DSC) The relationship between the ultrasound conditions and the crystalline structure as well as the
Jul 06 2018As a preface to a discussion of the composition of marine INPs we first summarize findings regarding the chemical composition of SSA Sea salts particulate organic matter (e g phytoplankton bacteria) and dissolved organic matter (e g organic macromolecules and exudates) are transferred into SSA from the bulk surface seawater (upper 100 m of the ocean) and the sea surface
NA show enhanced !-nucleating ability towards iPP matrix Except for the methods mentioned above few approaches have been reported by which the !-transcrystallinity in fiber/iPP composites can be directly formed under static conditions Rare earth !-NA (WBG- II) exhibits considerable!-selectivity and nucleating efficiency to induce !-iPP [19 20]
In most cases nucleating agents (e g noble metals fluorides ZrO 2 TiO 2 P 2 O 5 Cr 2 O 3 or Fe 2 O 3) are added to the base glass composition to boost the nucleation process A less frequently used method is to induce and control internal crystalliza-tion during the cooling path of a molten viscous liquid This process is used some-
The influence of new β nucleating agent ( aniline compound) on the mechanical properties of polypropylene was studied The crystallization behavior of β nucleated PP was investigated by polarized optical microscopy (POM) differential scanning calorimetry (DSC) and wide angle X-ray diffraction (WAXD) The results showed that as the formation of β crystalline with sheaf-like structure by
Apr 05 2016In this study a new rare earth β-nucleating agent (WBG-II) which has been synthesized and studied by Feng et al was used to generate rich β-crystalline structure in the injection molding samples with various contents of WBG Three types of β-crystalline morphologies namely β-spherulite bundle-like β-spherulite and leaf-like
Feb 01 2018A rare-earth β-nucleating agent (trade name: WBG-II) was supplied by Guangdong Weilinna Inc (Guangdong China) It is a type of dimetal complex made of lanthanum and calcium with dicarboxylic acid and amide-type ligands
b-nucleating agent Lamellar branching Step-cycle test Stress relaxation abstract Melt-stretched isotactic polypropylene (iPP) filled with different weight fractions (0 0 1 0 2 and 0 4 wt %) of b-nucleating agent (b-NA) was extruded via a single screw extruder with a
Abstract In this paper the crystalline modification of isotactic polypropylene (PP) based on rare earth β‑nucleating agent (WBG) with surface modification were investigated by differential scanning calorimetry (DSC) and wide-angle X-ray diffraction (WAXD)
Disclosed are a β-crystal form nucleating agent composition for polypropylene and an application thereof The composition is prepared by proportionally mixing barium tetrahydrophthalate calcium tetrahydrophthalate and the like with adjuvants such as hydrotalcite or calcium carbonate The composition has better functions than a single-component β-nucleating agent
Jul 20 2017Qu N Fu Y An F Qu J Wang K Li B (2006) Study on mechanical properties and crystallization behavior of polypropylene and its blends modified by β crystalline form nucleating agent Polym Plast Technol 45:637–640 doi: 10 1080/03602550600553655 CrossRef Google Scholar
In this paper the crystalline modification of isotactic polypropylene (PP) with a rare earth β nucleating agent (WBG) with different ultrasound conditions was investigated by scanning electron microscopy (SEM) wide-angle X-ray diffraction (XRD) and differential scanning calorimetry (DSC) The relationship between the ultrasound conditions and the crystalline structure as well as the
How exactly the nanometric structure of crystalline ice nucleating agents affects the kinetics of ice formation is still an open question (see e g ref 40 and 32) In fact it would be expected that an atomically smooth and homogeneous CHL surface would nucleate ice with a single nucleation rate and hence within a far narrower range of
Mar 04 2004Wide-angle X-ray diffraction (WAXD) was used to investigate the effects of shear on the crystallization behavior of polypropylene (PP) with β-nucleating agent The melt was subjected to shear at the shear rate from 0 5 to 60 s-1 for 5 s with a CSS450 shear stage For the PP with low content of the additive the formation mechanism of the β crystals is almost the same as that of pure
Most of the GC generally has some nucleating agent which aid in developing desired crystalline phases by nucleation as well as crystallization followed by growth from mother glass Various nucleating agents which are generally used are TiO 2 ZrO 2 P 2 O 5 Y 2 O 3 and other rare earth oxides TiO 2
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