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In Depth Exploration: Polyisobutylene a Versatile Additive
Polyisobutylene, a polymer synthesized via cationic polymerization using isobutylene as the monomer, is a typical saturated linear polymer with a wide molecular weight range, spanning from several hundred to several million. Polyisobutylene plays an important role in various fields such as petrochemicals and rubber-plastic polymers, and is commonly used as a functional additive. Next, we will delve into the various properties and applications of polyisobutylene.
Release time:
2021-11-12
Polyisobutylene, a polymer synthesized via cationic polymerization using isobutylene as the monomer, is a typical saturated linear polymer with a molecular weight ranging widely—from several hundred to several million. Polyisobutylene plays an important role in various fields such as petrochemicals and rubber-plastic polymers, and is commonly used as a functional additive. Next, we will delve into the various properties and applications of polyisobutylene.
The molecular chains of polyisobutylene consist primarily of an ordered sequence in which the ends are linked head-to-tail, with no double bonds or long side chains. Moreover, the structural units of polyisobutylene do not contain any asymmetric carbon atoms. This unique molecular structure endows polyisobutylene with the chemical properties typical of saturated hydrocarbons, making it a polymer with outstanding performance. Depending on their number-average molecular weights, polyisobutylene can be classified into several categories: low-molecular-weight polyisobutylene has a number-average molecular weight ranging from 200 to 10,000; medium-molecular-weight polyisobutylene falls within the range of 20,000 to 45,000; high-molecular-weight polyisobutylene has a number-average molecular weight between 75,000 and 600,000; and ultra-high-molecular-weight polyisobutylene exhibits a number-average molecular weight exceeding 760,000.
Given the wide variation in quality of polyisobutylene products on the market, in order to maintain market order and protect consumer rights, the state has established relevant standards. Among these, “NB/SH/T0927-2016 High-Activity Polyisobutylene” sets forth stringent requirements for the quality of polyisobutylene products.
