Both the amorphous and the crystalline polymer segments are copolymers of one or more alpha-olefins and one or more di-olefin monomers. Crosslinking of at least a portion of the mixture of polymer segments is accomplished during the polymerization of the composition by incorporation of single di-...
The arrangement of elements in amorphous solids is mostly random and disorderly. Because of this, when amorphous solids are cut, they break into uneven pieces. Examples include window glass, various polymers, rubber, etc. Crystalline vs. Amorphous Solids In the following lines, we shall compare t...
White et al., " Specification of Biaxial Orientation in Amorphous and Crystalline Polymers ", Pol. Engineering and Science vol. 21, No. 13, pp. 859-868 (1981).White, J.L. and Spruiell, J.E. (1981) Specification of biaxial orientation in amorphous and crystalline polymers, Polymer Engng...
2.2.1.1 Crystalline and Amorphous Polymers Polymers can be amorphous and semicrystalline depending on the arrangements of polymeric chains. In an amorphous polymer, chains exist as random coils. Examples for amorphous polymers are polycarbonate, polymethyl methacrylate, and atactic polystyrene. In semicryst...
leading to semi-crystalline or amorphous, transparent polymers that can compete with the thermal properties of commercial high-performance polyamides. Copolyamides with caprolactam and laurolactam exhibit an increased glass transition and amorphicity compared to the homopolyamides, potentially broadening the ...
Thus, it would be of great interest to probe the blends of these two polyesters, not only on phase behavior and miscibility in the amorphous phase of blends but also effect of blending on crystals, spherulites, polymorphism, etc. Effects of blending and miscibility of two crystalline polymers ...
The material basis weight increasing agent comprises selected ratios of crystalline and amorphous polymers. In some versions of the invention, polymers capable of existing in different configurations (e.g., a polymer such as polypropylene which can exist in an atactic, syndiotactic, or isotactic ...
The present invention is generally directed to adhesive compositions comprising selected ratios of crystalline and amorphous polymers. In some versions of the invention, polymers capable of existing in different configurations (e.g., a polymer such as polypropylene which can exist in an atactic, syndi...
crystalline polymers is predicted by a primitive molecular theory based on the change in the conformational free energy of tie chains, and the calculated results suggest that the overall stress increases with an increase in the frac- tion of tie chains.10–13 To date, the role of amorphous ...
Let us examine the basic ideas of the method on the example of constructing a model of the SMS of a polymer of spherulitic structure, which is one of the basic and most common structural formations [2, 3, 5, 16-20] formed in crystallization of amorphous-crystalline polymers. The ...