Hello, everyone.
I'm studying polymer polymorphism.
I've learned that PB-1 can exist in three forms: Ⅰ, Ⅱ, and Ⅲ, each with distinct lattice structures.
Are α, β, and γ crystals a different concept from the forms Ⅰ, Ⅱ, and Ⅲ?
What do α, β, and γ crystals represent in PB-1?
If 'form Ⅰ, Ⅱ, Ⅲ' and 'α, β, γ crystals' are different concepts, What effects do α, β, and γ crystals have on the chemical and mechanical characteristics of PB-1?
I would appreciate clarification on this concept. Thank you.
If polymorphism exists there will be significant changes in the mechanical, thermal and kinetics of chemical reactions in the alpha, betaa d Gama cystals
In PB-1, the forms Ⅰ, Ⅱ, and Ⅲ refer to the different crystal polymorphs, which are distinct crystalline structures that can occur in the material. These forms have different lattice parameters and unit cell dimensions, which affect the material's properties. On the other hand, the α, β, and γ crystals refer to the different crystal modifications that can occur within each of the forms Ⅰ, Ⅱ, and Ⅲ. These crystal modifications arise from differences in the chain packing and molecular conformation within the crystal lattice. In PB-1, the α, β, and γ crystals are related to the specific arrangement of the polymer chains within the crystal lattice. The α crystals have a planar zigzag conformation, while the β crystals have a twisted conformation. The γ crystals, also known as the "gauche" form, have a bent or kinked conformation. These different crystal modifications (α, β, and γ) can coexist within each of the forms Ⅰ, Ⅱ, and Ⅲ, and their relative proportions can vary depending on factors like temperature, pressure, and processing conditions.
Now, regarding the effects of α, β, and γ crystals on the chemical and mechanical characteristics of PB-1:
* α crystals tend to be more rigid and stiff, contributing to higher modulus and hardness.
* β crystals are more flexible and can contribute to higher impact resistance and toughness.
* γ crystals can exhibit improved optical clarity and stability.
Ali Behrad Vakylabad Could you recommend any reference for crystal modifications in PB-1, please?
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