Convenient characterization of polymers grafted on cellulose nanocrystals via SI-ATRP without chain cleavage

Carbohydrate Polymers
Zhen ZhangXiaosong Wang

Abstract

Cleaving is usually required to characterize the molecular weight of grafted polymers on substrates. Here, we report on a technique to estimate the molecular weight of grafted polystyrene (PS) (Mngrafted PS) in PS-grafted cellulose nanocrystals (PS-g-CNCs) without chain cleavage. PS-g-CNCs were prepared from brominated CNC (CNC-Br) by Surface-Initiated Atom Transfer Radical Polymerization (SI-ATRP) in the presence of sacrificial initiators. Differential scanning calorimetry (DSC), dynamic light scattering (DLS), and thermogravimetric analysis (TGA) of PS-g-CNCs revealed that Mngrafted PS increased proportionally with monomer conversion. By comparing the mass of grafted PS, deduced from TGA curves, with initiating sites on CNC-Br, Mngrafted PS was calculated. The resultant Mngrafted PS was the same as Mn of free PS initiated by sacrificial initiators and matched theoretical values calculated according to monomer conversion. Therefore, grafting polymerization from CNC-Br and free polymerization were progressing in a controlled manner with the same propagating rates.

References

Dec 26, 2001·Chemical Reviews·K Matyjaszewski, J Xia
Nov 11, 2003·Biomacromolecules·Anna Carlmark, Eva E Malmström
Mar 15, 2005·Biomacromolecules·Stephanie Beck-CandanedoDerek G Gray
Mar 21, 2007·Biomacromolecules·Emma OstmarkEva E Malmström
Apr 8, 2009·Langmuir : the ACS Journal of Surfaces and Colloids·Gaelle MorandiWim Thielemans
Aug 11, 2010·Langmuir : the ACS Journal of Surfaces and Colloids·Elisabeth Kloser, Derek G Gray
Jul 20, 2013·Biomacromolecules·Kevin H M KanEmily D Cranston
Apr 12, 2016·Biomacromolecules·Juntao TangKam Michael Chiu Tam
Apr 17, 2016·Carbohydrate Polymers·Nathan GrishkewichKam C Tam
Feb 6, 2017·Soft Matter·Biao ZuoXinping Wang
Apr 22, 2016·Materials·Liqing Wei, Armando G McDonald

❮ Previous
Next ❯

Citations

Jul 3, 2019·ACS Applied Materials & Interfaces·Bailey RisteenElsa Reichmanis
Nov 18, 2020·ACS Applied Materials & Interfaces·Ryo KatoStuart J Rowan

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.