A New Class of Ultra‐Efficient Supramolecular Nucleating Agents for Isotactic Polypropylene

Abraham, Frank; Kress, Roman; Smith, Paul; Schmidt, Hans‐Werner

doi:10.1002/macp.201200487

Cited by 29 publications

(19 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Recently this class of supramolecular building blocks was reviewed by Palmans et al 1,3,5‐Benzenetrisamides are accessible with a few synthetic steps and their structure can be tailored for a broad range of applications including nanotechnology, polymer additives, and biomaterials. Benzenetrisamides can be applied, for example, as nucleating agents for poly(vinylidene fluoride), poly(butylene terephthalate) (PBT), poly(ethylene‐ co ‐propylene), polylactides, and isotactic poly(propylene) ( i ‐PP) . In some cases trisamides are also efficient clarifiers .…”

Section: Resultsmentioning

confidence: 99%

“…Benzenetrisamides can be applied, for example, as nucleating agents for poly(vinylidene fluoride), poly(butylene terephthalate) (PBT), poly(ethylene‐ co ‐propylene), polylactides, and isotactic poly(propylene) ( i ‐PP) . In some cases trisamides are also efficient clarifiers . Furthermore, they can control the cell nucleation and foam morphology during foaming of injection molded i ‐PP, and additionally are known as additives to improve the electret performance of i ‐PP .…”

Section: Resultsmentioning

confidence: 99%

“…1,3,5‐Benzenetrisamides ( 1 (S) to 6 (S)), and 1,3,5‐cyclohexanetrisamides ( 11 – 14 ) were synthesized according to the literature procedures . All other as yet unreported trisamides presented in this article were synthesized according to known literature methods . Full synthetic procedures and analytical data are included in the ESI.…”

Section: Methodsmentioning

confidence: 99%

See 2 more Smart Citations

Melt Electrospinning of Small Molecules

Singer

Ringk

Giesa

et al. 2015

Macro Materials & Eng

Self Cite

View full text Add to dashboard Cite

Electrospinning is an attractive way to prepare nano‐ and macrofibers. It was demonstrated by our group that trisamides can be melt electrospun into supramolecular fibers. To establish structure–property relationships regarding spinnability and morphology, melt electrospinning experiments were conducted using several classes of compounds. The number of hydrogen bonds was systematically decreased from three for trisamides, to two for bisamide and sorbitols, and to zero for perylene bisimides and tertiary trisamides. As a result, trisamides are readily spun into fibers, whereas for bisamides and sorbitols mainly electrospraying into spheres is observed. Perylene bisimides form well‐defined fibers due to strong π–π interactions. This supramolecular fiber is interesting for many scientific disciplines.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Melt Electrospinning of Small Molecules

Singer

Ringk

Giesa

et al. 2015

Macro Materials & Eng

Self Cite

View full text Add to dashboard Cite

show abstract

“…While aromatic heterocyclic phosphate salts have rather high melting points (generally higher than 400C), they are also intrinsically insoluble in a molten iPP matrix. Thus a drawback of aromatic heterocyclic phosphate salts is the difficulty of achieving a homogeneous dispersion in the polymer due to their insolubility [24]. Since a good dispersion of these nucleating agents in an iPP matrix can not be realized, some processing defects (such as "fish eyes") are generated.…”

Section: Introductionmentioning

confidence: 99%

Properties and Crystallization Behaviors of Isotactic Polypropylene Under Action of an Effective Nucleating Agent

Zhang

Guo

Chen

et al. 2015

Journal of Macromolecular Science, Part B

View full text Add to dashboard Cite

The calcium salt of hexahydrophthalic acid (Hyperform HPN-20E) is an effective nucleating agent for polyethylene (PE) which was developed by Milliken Chemical Co., (U.S.A) in recent years. In this paper the properties and crystallization behaviors of isotactic polypropylene (iPP) in the presence of Hyperform HPN-20E were investigated by using differential scanning calorimetry (DSC) and polarized optical microscopy (POM). Addition of Hyperform HPN-20E improved the tensile, flexural and optical properties of iPP significantly and increased the crystallization rate of iPP greatly. The nucleation effects were comparable to the nucleation efficiency of a highly effective commercial iPP nucleating agent Hyperform HPN-68. When the addition amount of Hyperform HPN-20E in iPP was 0.2wt%, the tensile strength, tensile modulus, flexural strength and flexural modulus of iPP were increased by 10.81%, 8.65%, 16.67% and ACCEPTED MANUSCRIPT ACCEPTED MANUSCRIPT 2 11.96%, respectively, compared to those of pure iPP; the haze value was decreased by 42.44% and the crystallization peak temperature was increased by 11.2°C. In addition, incorporation of Hyperform HPN-20E in iPP greatly reduced the spherulite size of iPP.

show abstract

“…21, [29][30][31] Mostly, BTAs form columnar stacks during self-assembly processes driven by three directed self-complementary hydrogen bonds. [32][33][34] Due to the complexity and hierarchical structured morphologies of this materials class, BTAs can be used in various applications, e.g., as additives for the nucleation [35][36][37][38][39][40][41][42][43][44] and clarification 35 of thermoplastic semi-crystalline polymers or to improve the electret performance of polypropylene. [45][46][47] These applications require the presence of solid supramolecular nanostructures formed by the additives in the polymer melt.…”

mentioning

confidence: 99%

Tailoring Supramolecular Nanofibers for Air Filtration Applications

Weiß

Skrybeck

Misslitz

et al. 2016

ACS Appl. Mater. Interfaces

Self Cite

View full text Add to dashboard Cite

The demand of new materials and processes for nanofiber fabrication to enhance the performance of air filters is steadily increasing. Typical approaches to obtain nanofibers are based on top-down processes such as melt blowing, centrifugal spinning, and electrospinning of polymer materials. However, fabrication of polymer nanofibers is limited with respect to either a sufficiently high throughput or the smallest achievable fiber diameter. This study reports comprehensively on a fast and simple bottom-up process to prepare supramolecular nanofibers in situ inside viscose/polyester microfiber nonwovens. Here, selected small molecules of the materials class of 1,3,5-benzenetrisamides are employed. The microfiber-nanofiber composites exhibit a homogeneous nanofiber distribution and morphology throughout the entire nonwoven scaffold. Small changes in molecular structure and processing solvent have a strong influence on the final nanofiber diameter and diameter distribution and, consequently, on the filtration performance. Choosing proper processing conditions, microfiber-nanofiber composites with surprisingly high filtration efficiencies of particulate matter are obtained. In addition, the microfiber-nanofiber composite integrity at elevated temperatures was determined and revealed that the morphology of supramolecular nanofibers is maintained compared to that of the utilized polymer nonwoven.

show abstract

A New Class of Ultra‐Efficient Supramolecular Nucleating Agents for Isotactic Polypropylene

Cited by 29 publications

References 20 publications

Melt Electrospinning of Small Molecules

Melt Electrospinning of Small Molecules

Properties and Crystallization Behaviors of Isotactic Polypropylene Under Action of an Effective Nucleating Agent

Tailoring Supramolecular Nanofibers for Air Filtration Applications

Contact Info

Product

Resources

About