30.6: Polymer Structure and Physical Properties
Chain branching: Polymer chains without branching can pack closely together. Lack of branching increases the crystallinity of polymers. Interchain interactions: (Intermolecular forces and Crosslinking). Crystallinity increases as the strength of the intermolecular forces between polymer chains increases.
7.9: Polymers and Plastics - Chemistry LibreTexts
2022年11月13日 · Let's begin by looking at an artificial polymer that is known to everyone in the form of flexible, transparent plastic bags: polyethylene. It is also the simplest polymer, consisting of random-length (but generally very long) chains made up of two-carbon units. Figure \(\PageIndex{1}\): Polymers
Polymer Chain: Understanding Its Structure ... - Polymer Process
Key takeaways: Polymer chains are made up of repeating units called monomers. Polymerization can occur through addition or condensation reactions. Polymer chain structure can be linear, branched, or cross-linked. Polymer properties include strength, flexibility, thermal resistance, chemical resistance, and insulation.
29.4: Forces Between Polymer Chains - Chemistry LibreTexts
Physical properties such as tensile strength, x-ray diffraction pattern, resistance to plastic flow, softening point, and elasticity of most polymers can be understood in a general way in terms of crystallites, amorphous regions, the degree of flexibility of the chains, cross-links, and the strength of the forces acting between the chains ...
Polymer Chain - an overview | ScienceDirect Topics
Polymer chains, a concatenated sequence of monomers, pervade spatial dimensions on the size scale of tens of nanometers, making their use in the generation of nanostructured materials a natural fit. Polymers are also inherently easy to process from the melt and solution.
Plastic - Polymers, Synthetic, Recycling | Britannica
2024年10月17日 · Polymers are chemical compounds whose molecules are very large, often resembling long chains made up of a seemingly endless series of interconnected links. The size of these molecules, as is explained in chemistry of industrial polymers, is extraordinary, ranging in the thousands and even millions of atomic mass units (as opposed to the tens of ...
Polymer Chain - an overview | ScienceDirect Topics
A polymer chain is a sequence of monomers that are linked together and can be used to create nanostructured materials. These chains can be easily processed and chemically modified to have various functionalities, allowing for the creation of tailored thin films and nanostructured materials. From: Polymer Science: A Comprehensive Reference, 2012.
Polymers and plastics: Types, properties, and manufacturing
2022年1月1日 · Plasticizer molecules intercalate between the polymer chains reducing the intermolecular forces by increasing the interchain distance. The main effect of their presence is the reduction of stiffness and hardness with the simultaneous improvement of …
31.7 Polymer Structure and Physical Properties - OpenStax
On heating, water is eliminated, many cross-links form, and the polymer sets into a rocklike mass. The cross-linking in Bakelite and other thermosetting resins is three-dimensional and is so extensive that we can’t really speak of polymer “chains.” A piece of …
Basic Polymer Structure | MATSE 81: Materials In Today's World
Graft copolymers are created by attaching chains of a second type of monomer on the backbone chain of a first monomer type. The four basic copolymer structures. Credit: Adapted from Fig. 4.9, Callister & Rethwisch 5e. Before we move on to the many uses of polymers, watch this four-minute video which will introduce the uses of polymers. To Watch.