The effects of rubber nanoparticles with different polarities on thermal properties and foaming performance of polypropylene blends

Tian, Bo; Li, Zhigang; Li, Jinfeng; Yao, Gang; Dong, Wei; Liu, Yuguang; Di, Mingwei

doi:10.1039/d0ra04486e

Cited by 9 publications

(4 citation statements)

References 37 publications

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“…The crystallization performance of HX irradiated at 30 kGy under different packaging conditions was tested by DSC, and the results of thermal performance parameters are shown in Figure 6 and Table 1. Curve A irradiated at 30 kGy in air conditions had a T c of 107.86 °C, which was significantly lower than that of unirradiated PP in previous studies, indicating that the molecular weight of PP decreased after irradiation, [30] and the peak shape narrowed because crystallization integrity increased. Curve B under nitrogen packaging had increased Tc, ΔT, Ti, X c , and peak shape widened compared to curve A, indicating that the molecular weight of the protective clothing material was protected to a certain degree after nitrogen packaging, and the crystalline integrity was weakened due to the widened peak shape [31] .…”

Section: Resultscontrasting

confidence: 55%

The Structure and Properties of Medical Disposable Protective Clothing Materials with Different Packaging and Models under γ Irradiation

Tian,

Li,

et al. 2024

ChemistrySelect

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This study investigated the radiation effects of commercially available medical disposable protective clothing materials under γ irradiation. FT‐IR, contact angle, DSC, OIT, and mechanical properties were used to examine the radiation effects of medical disposable protective clothing materials. The results showed when the radiation dose was less than or equal to 50 kGy, the FT‐IR spectra did not show any changes. However, when the radiation dose reached 70 kGy, new absorption peaks appeared in the infrared spectra of the TS−A and TS−B medical disposable protective clothing materials, indicating chemical changes. Contact angle analysis showed that medical disposable protective clothing materials were hydrophobic and had higher hydrophobicity on the inside than the outside under different packaging and irradiation conditions. Rheological analysis showed that the shear thinning phenomenon of medical disposable protective clothing materials increased significantly with the increase of radiation dose, and good rheological behavior was observed under vacuum packaging conditions when the radiation dose was 30 kGy. The crystallinity and initial crystallization temperature showed the order of vacuum, nitrogen, and air. The oxidation induction time trend was vacuum>nitrogen>air, while the fracture strength trend was nitrogen>vacuum>air. The mechanical properties met the national standard.

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Section: Resultscontrasting

confidence: 55%

The Structure and Properties of Medical Disposable Protective Clothing Materials with Different Packaging and Models under γ Irradiation

Tian,

Li,

et al. 2024

ChemistrySelect

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“…Until now, a few physicochemical processes have been devoted to impede spontaneous molecular aggregation. − Ensembles of magnetic microparticles that were prone to aggregate into multiparticle surface clusters were reportedly disaggregated using time-dependent magnetic fields of a multipole electromagnet . Light-controlled particle size modulation of spiropyran-incorporated latex surface by UV–vis irradiation-induced photoswitchable aggregation-disaggregation method was reported by Abdollahi et al There exist other physical methods for the disaggregation of probe aggregates including cocrystallization, ultrasonic radiation, heat-treatment, blending, etc. − Nevertheless, majority of the reports focus on inhibition of probe aggregation employing chemical transformations. Huang et al devised the idea of attaching bulky spacers like oligo-alkylfluorene moieties with the fluorophores to suppress molecular self-association .…”

Section: Introductionmentioning

confidence: 99%

Critical Assessment of Micellar Surface Charge-Dependent Disaggregation and Reaggregation of a Bis-Indole Self-Aggregate: What Should Be Our Case-Dependent Choice?

Samanta,

Paul,

Chatterjee

et al. 2024

Langmuir

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Metrics & MoreArticle Recommendations * sı Supporting Information ABSTRACT: "Aggregation-caused quenching" is a deep-seated mechanism and has been widely used by the researchers as the possible basis for new sensor development. Contrast to aggregation, its turn around process, disaggregation, has gained much less consideration so far. Unfortunately, study of the further scope for reaggregation of the disaggregated probe assembly in the same solution, as and when required, is still under the rare category. The central theme of the current study is focused on this aspect. For this purpose, the effects of headgroup charge (cationic, anionic, and nonionic) and polarity of the micelles on the degree of disaggregation and subsequent emission amelioration of a synthesized bis-indole derivative, 3,3′-bisindolyl(phenyl)methane (BIPM), are studied using steady-state and time-resolved spectroscopic techniques. The relative emission yield of BIPM (φ f = 0.01) is significantly enhanced in the presence of cetyltrimethylammonium bromide (φ f = 0.21) and polyoxyethylene (20) sorbitan monolaurate (φ f = 0.24), whereas comparatively less emission enhancement is recorded within the sodium dodecyl sulfate system (φ f = 0.07). In contrast, addition of an external biophilic agent, uric acid, causes requenching of the enhanced emission because of the reaggregation of the disaggregated probes. Detailed microscopic and calorimetric studies are also adopted to investigate the disaggregation-reaggregation mechanism of BIPM associations. The study will provide prior insights about the use of suitable micellar systems for the required degree of disaggregation as well as for the modulation of emission efficiency by controlled tuning of the disaggregation-reaggregation equilibrium for similar probe associations in pure aqueous medium avoiding any chemical transformation.

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“…Wang et al 10 prepared modified TPEE foam with cell size from submacro to nano by solid phase batch foaming method. Supercritical CO 2 (sc‐CO 2 ) and supercritical N 2 (sc‐N 2 ) are the most commonly used blowing agents in supercritical fluid foaming processes 11–14 . CO 2 generally has higher solubility and diffusivity in polymer matrix.…”

Section: Introductionmentioning

confidence: 99%

Development of thermoplastic polyether ester elastomer microcellular foam with high resilience: Effect of chain extension on foaming behavior and mechanical properties

Li-juan

et al. 2023

J of Applied Polymer Sci

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The lightweight development of thermoplastic polyether ester elastomer (TPEE) has been limited by its low‐melt strength. In this work, the epoxy chain extender ADR was employed to improve TPEE's melt strength in order to enhance its foamability by supercritical N2 (sc‐N2). The results showed that the melt strength of TPEE increased gradually with the increase of ADR content, which led to the uniformity of the foam cell structure and the improvement of its mechanical properties, that is, a high resilience of 82%. However, when ADR content exceeded 1.6 phr, the viscosity was too high to induce foaming. Remarkably, the maximum stress retention of TPEE foam with 1.6 phr ADR remained at 90% after 50 cycles of compression, while the strain recovery rate was higher than 85%. The prepared TPEE foam has excellent resilience and dynamic mechanical properties, which broadens its application in fields of midsole, sports equipment and transportation.

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The effects of rubber nanoparticles with different polarities on thermal properties and foaming performance of polypropylene blends

Abstract: Polypropylene blends with both polybutadiene rubber and polycarboxylbuturonile rubber and the required amount of acrylamide was prepared by blending with water, improve the foaming and thermal properties of polypropylene.

Cited by 9 publications

References 37 publications

The Structure and Properties of Medical Disposable Protective Clothing Materials with Different Packaging and Models under γ Irradiation

The Structure and Properties of Medical Disposable Protective Clothing Materials with Different Packaging and Models under γ Irradiation

Critical Assessment of Micellar Surface Charge-Dependent Disaggregation and Reaggregation of a Bis-Indole Self-Aggregate: What Should Be Our Case-Dependent Choice?

Development of thermoplastic polyether ester elastomer microcellular foam with high resilience: Effect of chain extension on foaming behavior and mechanical properties

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