Copolymer and method for manufacturing the same and packaging material utilizing the same

Abstract

The disclosed is a copolymer having a formula as: R 1 is a combination of naphthalene, phenylene, butyl, and hexyl. R 2 is a combination of ethylene, cyclohexene, 2-methylpropyl, and neopentyl. n is a number of 1500 to 3000. The copolymer has a transparency greater than 80%, a thermal resistance greater than 100° C., a moisture absorption less than 0.5 wt %, and yellowing under UV/climate resistance greater than 1000 hours, such that the copolymer is adapted to be applied in packaging material for light emitting devices.

1 . A copolymer, having a general formula: 
     
       
         
         
             
             
         
       
     
     wherein
 R 1  is a combination of naphthalene, phenyl, butyl, and hexyl; 
 R 2  is a combination of cyclohexylene dimethylene, ethylene, 2-methylpropyl, and neopentyl; and 
 n is 1500 to 3000. 
 
   
   
       2 . The copolymer as claimed in  claim 1 , wherein the cyclohexylene dimethylene comprises cis-1,2-cyclohexylene dimethylene, trans-1,2-cyclohexylene dimethylene, cis-1,3-cyclohexylene dimethylene, trans-1,3-cyclohexylene dimethylene, cis-1,4-cyclohexylene dimethylene, trans-1,4-cyclohexylene dimethylene, or combinations thereof. 
   
   
       3 . The copolymer as claimed in  claim 1 , wherein the naphthalene comprises 1,4-naphthalene, 2,3-naphthalene, 2,6-naphthalene, or combinations thereof. 
   
   
       4 . The copolymer as claimed in  claim 1 , wherein the phenyl comprises 1,2-phenyl, 1,3-phenyl, 1,4-phenyl, or combinations thereof. 
   
   
       5 . The copolymer as claimed in  claim 1  having a transparency greater than 80%. 
   
   
       6 . The copolymer as claimed in  claim 1  having a thermal resistance greater than 100° C. 
   
   
       7 . The copolymer as claimed in  claim 1  having a moisture absorption less than 0.5 wt %. 
   
   
       8 . The copolymer as claimed in  claim 1  having a yellowing resistance under UV and/or climate greater than 1000 hours. 
   
   
       9 . A packaging material, comprising the copolymer as claimed in  claim 1 . 
   
   
       10 . A method for forming a copolymer, comprising:
 providing a diol combination of cyclohexylene dimethanol, ethylene glycol, 2-methyl-1,3-propylene glycol, and neopentylene glycol;   providing a diacid combination of naphthalene dicarboxylic acid, benzene dicarboxylic acid, succinic acid, and adipic acid; and   mixing and heating the diol combination and the diacid to process condensation polymerization to form the copolymer having a general formula:   
     
       
         
         
             
             
         
       
     
     wherein
 R 1  is a combination of naphthalene, phenyl, butyl, and hexyl; 
 R 2  is a combination of cyclohexylene dimethylene, ethylene, 2-methylpropyl, and neopentyl; and 
 n is 1500 to 3000. 
 
   
   
       11 . The method as claimed in  claim 10 , wherein the cyclohexylene dimethylene comprises cis-1,2-cyclohexylene dimethylene, trans-1,2-cyclohexylene dimethylene, cis-1,3-cyclohexylene dimethylene, trans-1,3-cyclohexylene dimethylene, cis-1,4-cyclohexylene dimethylene, trans-1,4-cyclohexylene dimethylene, or combinations thereof. 
   
   
       12 . The method as claimed in  claim 1 , wherein the naphthalene comprises 1,4-naphthalene, 2,3-naphthalene, 2,6-naphthalene, or combinations thereof. 
   
   
       13 . The method as claimed in  claim 1 , wherein the phenyl comprises 1,2-phenyl, 1,3-phenyl, 1,4-phenyl, or combinations thereof.