Abstract: A modified polyethylene terephthalate copolyester, including three fragments shown as [Fragment 1], [Fragment 2], and [Fragment 3] in the specification, is provided.

Abstract: A preparation method of a modified bismaleimide resin includes the following steps. Maleic anhydride is mixed with a bisamine compound to obtain a corresponding mixture. The mixture is heated. The bisamine compound has a main chain structure or fragment represented by Formula A, Formula B, or Formula C as described in the description.

Abstract: The disclosure provides a resin composition, which includes 30 wt % to 50 wt % of a bismaleimide resin; 1 wt % to 10 wt % of an epoxy resin; 1 wt % to 10 wt % of a benzoxazine resin; 1 wt % to 5 wt % of a hardener; 10 wt % to 40 wt % of a filler; and 0.1 wt % to 3 wt % of a coupling agent, based on a total weight of the resin composition.

Abstract: The disclosure provides a resin composition, which includes 30 wt % to 60 wt % of a bismaleimide resin; 1 wt % to 10 wt % of a liquid rubber resin; and 20 wt % to 50 wt % of a filler, based on a total weight of the resin composition.

Abstract: A preparation method of a modified naphthol resin includes the following. A nitration reaction and a hydrogenation reaction are sequentially performed on a naphthol resin to form a modified naphthol resin with an amino group in a structure. A solvent used in the hydrogenation reaction includes tetrahydrofuran, toluene, isopropanol, an amide solvent, or an above-mentioned co-solvent.

Abstract: An iontophoresis apparatus including a host, at least two accommodation modules, and a processor is provided. The host includes a housing, a switch mechanism connected to the housing, and at least two host contacts arranged on a side surface of the housing. The accommodation modules each includes a tank body having two side plates arranged oppositely, where a recess is defined in the tank body; an electrode arranged in the recess; and a tank contact arranged on one of the two side plates and electrically connected to the electrode. Two front-end plates of the tank bodies are adapted to be coupled to each other, and the accommodation modules are connected to the host through the tank contacts and the host contacts. The processor is configured to change the value of the current transmitted between the host and the two electrodes in response to that a user triggers the switch mechanism.

Abstract: The disclosure provides a phosphorous flame retardant, a product and manufacturing methods thereof, and the phosphorous flame retardant has the chemical structure shown in the following Formula (3) or Formula (4): In Formula (3), Y is H, F, Cl, or Br.

Abstract: A resin composition includes a copolymer. The copolymer includes an aromatic monomer and an alicyclic monomer. A molecular weight of the copolymer is in a range of 2000 to 5000. Compared with the copolymer, a proportion of the alicyclic monomer is 1% to 30%. A manufacturing method of the resin composition is also provided.

Abstract: A modified maleimide resin is provided. The modified maleimide resin is formed from a dicyclopentadiene (DCPD)-based resin having an amino group and a maleic anhydride by a condensation polymerization. The dicyclopentadiene-based resin having an amino group is formed by nitration and hydrogenation of dicyclopentadiene phenolic resin.

Abstract: A modified bismaleimide resin is provided. The modified bismaleimide resin is formed from a fluorine-based diamine and a maleic anhydride by a condensation polymerization. The fluorine-based diamine includes a fluorine group, a fluorine-containing substituent or a combination thereof, and further includes an arylene group, an ether group, an alkylene group, an amide group or a combination thereof.

Abstract: The disclosure provides a vinyl-containing aromatic alicyclic copolymer, a resin composition and a product thereof. The resin composition includes the vinyl-containing aromatic alicyclic copolymer, and the product made of the resin composition has a Tg of greater than 200° C., a dielectric constant Dk (10 GHz) of less than 3.0 and a dielectric loss Df (10 GHz) of less than 0.0014.

Abstract: A polyphenylene ether bismaleimide resin is provided. The polyphenylene ether bismaleimide resin (PPE-BMI) is formed from a modified polyphenylene ether diamine and a maleic anhydride by a condensation polymerization. The modified polyphenylene ether diamine is formed by reacting a phenol-based compound with a polyphenylene ether.

Abstract: A polymer resin includes a copolymer of polyethylene terephthalate (PET). In the process of preparing PET, part of ethylene glycol is replaced with other components to obtain the copolymer of PET.

Abstract: A modified bismaleimide resin, a method for preparing the same, a prepreg, a copper clad laminate, and a printed circuit board are provided. The modified bismaleimide resin is formed by reacting a diamine having a specific structure with maleic anhydride, and has greater amounts of non-polar and hydrophobic groups in the molecular structure thereof.

Abstract: A resin material and a metal substrate are provided. The resin material includes a resin composition and inorganic fillers. The inorganic fillers are uniformly dispersed in the resin composition. The resin composition includes 2 wt % to 40 wt % of a liquid rubber, 5 wt % to 60 wt % of a polyphenylene ether resin, 3 wt % to 40 wt % of a crosslinker, and 5 wt % to 40 wt % of a phosphorus flame retardant.

Abstract: A polyphenylene ether resin modified with benzoxazine, a method for producing the same, and a substrate material for a circuit board are provided. The polyphenylene ether resin modified with the benzoxazine has a structural formula as follows: in which R represents a chemical group that is located between two hydroxyphenyl functional groups of a bisphenol compound, and n is an integer between 3 and 25, inclusive.

Abstract: A polyphenylene ether resin modified with bismaleimide, a method for producing the same, and a substrate material for a circuit board are provided. The polyphenylene ether resin modified with the bismaleimide has a structural formula as follows: in which R represents a chemical group that is located between two hydroxyphenyl functional groups of a bisphenol compound, and n is an integer between 3 and 25, inclusive.

Abstract: A method of calculating a dielectric constant and a dielectric loss of a polymer material including the following steps is provided: providing a polymer having an optimized molecular geometry; analyzing a dipole moment autocorrelation function of the polymer having the optimized molecular geometry; fitting the dipole moment autocorrelation function of the polymer having the optimized molecular geometry via a relaxation function to obtain a corresponding fitting function; calculating a static permittivity of the polymer having the optimized molecular geometry; and obtaining a complex permittivity spectrum via the fitting function and the static permittivity, so as to calculate a corresponding dielectric constant and dielectric loss of the polymer having the optimized molecular geometry.

Abstract: A modified bismaleimide resin, a method for preparing the same, a prepreg, a copper clad laminate, and a printed circuit board are provided. The modified bismaleimide resin is formed by reacting a diamine having a specific structure with maleic anhydride, and has greater amounts of non-polar and hydrophobic groups in the molecular structure thereof.

Abstract: A power conversion apparatus including a transformer, a synchronous rectification (SR) transistor and a SR controller is provided. The SR transistor is coupled between a secondary side of the transformer and an output terminal. The SR controller receives a cross voltage between a drain terminal and a source terminal of the SR transistor as a first detection signal. The SR controller obtains a first time length according to a voltage value of the first detection signal, a voltage value of a first trigger signal and a voltage value of a second trigger signal. The SR controller determines a time point to turn off the SR transistor according to the first time length.