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BP10971 OH-PLLA-OH, High Molecular Weight Grades, IV ≥ 3 dl/g, Mw ≥ 480 kDa

Catalogue Number BP10971
Composition OH-PLLA-OH
Form Powder

OH-PLLA-OH is the high molecular weight grade within our hydroxyl-terminated poly(L-lactic acid) series. With an intrinsic viscosity ≥ 3 dl/g and a molecular weight ≥ 480 kDa, this product features hydroxyl groups at both ends. Stanford Advanced Materials (SAM) employs polymerisation control and rigorous GPC/DSC analysis to ensure consistent high molecular weight distribution, excellent mechanical properties, and reliable end-group functionality across all batches, establishing it as a high-performance functional material.

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FAQ

 Compared to medium and low molecular weight variants, what are the most prominent material performance characteristics of this high molecular weight OH-PLLA-OH?

Its core characteristics stem from high molecular weight (≥ 480 kDa) and strong chain entanglement due to long-chain structures. This imparts significantly higher tensile strength, modulus, and impact resistance, while simultaneously extending the degradation period considerably. It is suitable for application scenarios requiring long-term mechanical strength and durability.

What does high intrinsic viscosity (≥ 3 dl/g) mean in practical use, and how does it affect processing methods?

High intrinsic viscosity indicates longer polymer chains and higher melt or solution viscosity. This typically necessitates higher processing temperatures (for melt processing) or stronger solvent systems (for solution processing) and may influence parameters for mixing, casting, or extrusion. However, this characteristic contributes directly to the material's mechanical properties and dimensional stability.

What is the specific role of the hydroxyl-terminated structure in high molecular weight systems?

The hydroxyl-terminated structure provides reactive chain ends, facilitating further chemical modification, grafting, or serving as initiators for polymerisation. Even in high molecular weight systems, this end-group functionality makes the material a valuable "building block" for constructing more complex polymer structures and imparting additional functionality.

In which specific applications does this high molecular weight grade offer irreplaceable advantages?

It demonstrates clear advantages in fields requiring long-term load-bearing or sustained barrier functions. Examples include serving as the main material for biodegradable structural components, as a reinforcing matrix for high-performance biodegradable composites, and for engineering applications requiring multi-year stability, such as durable protective coatings and functional films.

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