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In polymer science, star-shaped polymers are the simplest class of branched polymers with a general structure consisting of several (at least three) linear chains connected to a central core. [1] The core, or the center, of the polymer can be an atom , molecule , or macromolecule ; the chains, or "arms", consist of variable-length organic chains.
A star-shaped polymer molecule is a branched polymer molecule in which a single branch point gives rise to multiple linear chains or arms. If the arms are identical the star polymer molecule is said to be regular. If adjacent arms are composed of different repeating subunits, the star polymer molecule is said to be variegated.
They are called intrinsic polymeric fullerenes, or more often all C 60 polymers. Fullerene can be part of a polymer chain in many different ways. Fullerene-containing polymers are divided into following structural categories: Intrinsic polymeric fullerene (homopolymer), Main-chain polymers, Side-chain polymers, Star polymers, Crosslinked polymers,
Branch point in a polymer. Polymer architecture in polymer science relates to the way branching leads to a deviation from a strictly linear polymer chain. [1] Branching may occur randomly or reactions may be designed so that specific architectures are targeted. [1] It is an important microstructural feature.
The polymers that are typically used to make the polymer based macromolecular cages are made with star shaped polymers or nonlinear polymer precursors. [3] [2] [4] The molecular size of the polymeric macromolecular cage is controlled by the molecular weight of the star-shaped polymer or branched polymer. The macromolecular cages made from non ...
President-elect Donald Trump listens to Elon Musk as he arrives to watch SpaceX's mega rocket Starship lift off for a test flight from Starbase in Boca Chica, Texas, Tuesday, Nov. 19, 2024.
Natalie Wood’s tragic death at age 43 left many to question the circumstances surrounding her fatal drowning for decades.. Beginning her career in Hollywood at the age of 5, Wood became an ...
Crystal structure of a first-generation polyphenylene dendrimer reported by Müllen et al [5] A first-generation "cyanostar" dendrimer and its STM image [6]. The first dendrimers were made by divergent synthesis approaches by Fritz Vögtle in 1978, [7] R.G. Denkewalter at Allied Corporation in 1981, [8] [9] Donald Tomalia at Dow Chemical in 1983 [10] and in 1985, [11] [12] and by George R ...