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On July 12, Cangzhou Dahua announced that the company's copolysilicon PC products had recently been successfully commissioned for a trial run, becoming the first domestic company to produce copolysilicon PCs by continuous production
Copolymerized silicon PC is a high-end PC product with broad development space and huge market potential
Noble in Polycarbonate - Copolymer PC
Noble in Polycarbonate - Copolymer PCPC is a common engineering plastic, but ordinary polycarbonate has poor impact resistance and chemical resistance, and cannot be used in many fields
The development trend of PC materials
(1) Silicon-containing copolycarbonate and representative manufacturers
(1) Silicon-containing copolycarbonate and representative manufacturersIn 1969, GE first developed polysiloxane (PDMS) copolycarbonate
1.
Both conventional PC and silicon-containing PC synthetic monomers contain bisphenol A and phosgene, but silicon-containing PC is also copolymerized with polydimethylsiloxane
We all know that polycarbonate has a rigid group with a huge benzene ring, which limits the internal rotation of the molecular segment, and the strong polar group -COO (ester group) provides a large intermolecular force, making The molecular chains are bound to each other, further weakening the flexibility of the molecular chains
2.
2.
The introduction of the organosilicon group increases the length of the structural unit, reduces the rigidity of the bulky benzene ring, increases the flexibility of the molecular chain, and thus improves the fluidity of the PC material
2) Improve hydrolysis resistance
To understand why hydrolysis resistance is improved, organosiloxane "-Si-0-Si-" is a hydrophobic group, and there is a strong chemical affinity between organosilicon compounds and inorganic silicate materials, using this It can effectively change the characteristics of the surface of the material to achieve a hydrophobic effect
3) Improve high and low temperature resistance, flame retardant, corrosion resistance and other properties
Due to the unique structure of organic silicon, it has both the properties of inorganic materials and organic materials.
Therefore, the organic silicon is inserted into the PC, so that the high and low temperature resistance of the PC can be improved, so that the mechanical properties at normal temperature can still be maintained at -30 ° C ~ -40 ° C; and the oxidation resistance stability and weather resistance of silicone Features, so that the oxidation resistance of PC is improved; yellowing resistance is enhanced
Synthesis mechanism of silicon-containing PC
Molecular chain of silicon copolymer PC
3.
3.
Figure SABIC's main types of copolymerized PC resins
Application cases of SABIC copolymerized PC in various industries
The most popular application in the near future is the application on the shell of medical equipment
PC copolymers are used in frequently sterilized, autoclavable medical device housings due to their good chemical resistance
(2) Bio-based polycarbonate (PC) resin and representative manufacturers
(2) Bio-based polycarbonate (PC) resin and representative manufacturersA bio-based polycarbonate (PC) resin developed by Mitsubishi Chemical Corporation of Japan
.
The comonomer of the transparent bioengineering plastic DURABIO developed by it is isosorbide instead of the traditional bisphenol
A.
DURABIO is not biodegradable and is suitable for a range of engineering applications
.
Compared with traditional PC resins, the main advantages of DURABIO are high transparency, excellent optical properties and high abrasion resistance
.
Its excellent optical properties benefit from the raw material isosorbide
.
Isosorbide is extracted from glucose and is a widely used biological raw material
.
According to Mitsubishi Chemical, DURABIO's optical properties and impact resistance are superior to conventional PC resins, and unlike bisphenol A, isosorbide is an aliphatic compound
.
In addition to high transparency and optical uniformity, this PC resin will only slightly yellow when exposed to light; the high transparency makes it easy to color even darker shades and metallic effect paints
.
Application of Mitsubishi Chemical Copolymer PC
