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Polymer Classification: Crystallinity01:21

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Unlike ionic or small covalent molecules, polymers do not form crystalline solids due to the diffusion limitations of their long-chain structures. However, polymers contain microscopic crystalline domains separated by amorphous domains.
Crystalline domains are the regions where polymer chains are aligned in an orderly manner and held together in proximity by intermolecular forces. For example, chains in the crystalline domains of polyethylene and nylon are bound together by van der Waals...
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Polymerization-induced self-assembly (PISA) and crystallization-driven self-assembly (CDSA) create advanced synthetic nano-objects for biomedicine. This review highlights PISA and CDSA advances for biocompatible and biodegradable block copolymer nanoparticles.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Biomedical Engineering

Background:

  • Polymerization-induced self-assembly (PISA) and crystallization-driven self-assembly (CDSA) are key methods for synthesizing advanced nano-objects.
  • These techniques offer distinct advantages in morphology control, solids content, and assembly complexity.
  • Block copolymer self-assembly is crucial for developing novel nanomaterials.

Purpose of the Study:

  • To review recent advances in PISA and CDSA for producing nano-objects.
  • To focus on the (bio)degradability and biocompatibility of these nano-objects for biomedical applications.
  • To guide the future design of block copolymer nanoparticles for clinical translation.

Main Methods:

  • Review of literature on PISA and CDSA techniques.
  • Analysis of nano-object properties related to biodegradability and biocompatibility.
  • Discussion of structure-property relationships in block copolymer self-assembly.

Main Results:

  • PISA yields diverse morphologies (spheres, vesicles, worms) at high solids content without surfactants.
  • CDSA enables precise control over nonspherical crystalline nano-objects and hierarchical assemblies.
  • Both methods are being optimized for biomedical suitability, focusing on material properties.

Conclusions:

  • PISA and CDSA are powerful, complementary techniques for creating advanced block copolymer nano-objects.
  • Tailoring biodegradability and biocompatibility is essential for successful biomedical translation.
  • Further research guided by these principles will accelerate clinical applications of these nanomaterials.