A Review on Enhanced Productivity Approaches in VCM Suspension Polymerization- Open access Journals- Juniper Publishers


Juniper publishers- Academic Journal of Polymer Science
Authored by Darvishi R

VCM suspension polymerization is performed as the batch-wise process. For this, the productivity of this high demand product is low. As VCM suspension polymerization is an exothermic process, the full capacity of the cooling system remains idle most of the time during the course of the polymerization.There are three strategies for keeping the reaction rate constant during the entire polymerization process. fast initiator dosage during reaction, cocktail initiator system and the temperature trajectory are the strategies that one can utilize to maintain the polymerization reaction rate at a constant value close to the allowed maximum rate. There are several reports that investigated separately the PVC resin properties obtained by these modes of polymerization. However, no report is published to compare the specifications of each mode together and also the PVC resin properties prepared by these policies. Letreture review shows that to achieve an enhanced productivity accompanied with the equivalent properties of a conventional VCM suspension polymerization, in terms of molecular and morphological characteristics, the best approach is using cocktail initiator system.
For more Open Access Journals in Juniper Publishers please click on https://juniperpublishers.com/


For more articles on Applied Polymer Science Journal please click on https://juniperpublishers.com/ajop/classification.php

To read more…FullText in Juniper Publishers

Comments

Post a Comment

Popular posts from this blog

Polymeric Materials for the Development of Dual↓Working Gastroretentive Drug Delivery Systems. A Breakthrough Approach

Image
   JUNIPER PUBLISHERS-   ACADEMIC JOURNAL OF POLYMER SCIENCE Abstract Oral route is the most convenient and widely used method of drug administration, representing about 90% of all therapies used. It displays great advantages, such as being non-invasive, easy to administer (with the consequent high patient compliance) and cost-effective. However, serious drawbacks to conventional oral dosage forms are imposed by the gastrointestinal tract. Large fluctuations in drug bioavailability are found due to the influence of physiological factors such as variations in pH, high enzymatic activity and gastric emptying. This is the reason why frequent drug administrations are required to maintain the therapeutic plasma level of the drug. Gastroretentive Drug Delivery Systems (GRDDS) have emerged as an ideal approach to overcome these drawbacks. They are designed to prolong the gastric residence time (GRT) of the dosage forms in the stomach so that the time between dose administration is lengthened.
Read more

Microdroplet Chemistry: Difference of Organic Reactions between Bulk Solution and Aqueous Microdroplets-Juniper Publishers

Image
Authored by Inho Nam                                                                                          Abstract Recent applications of microdroplet reactions are noted as reaction acceleration in confined environments and possible future scale-up synthesis compare to that of bulk phase reactions. Microdroplet reactions overcome the thermodynamic and kinetic challenges in an aqueous solution. Due to the microdroplet’s distinctive surface environment, the chemistry in Microdroplets significantly differs from that in the bulk solution. Keywords: Microdroplet; Noncovalent complexations; Electrostatic potential; Organic reactions Introduction Remarkable findings intrigued people in different fields by showing that extremely slow bulk phase reactions can be accelerated dramatically in aqueous microdroplets [1,2]. Not only the rate of the reaction but also the yields of reaction increased due to negative free-energy change which i
Read more