Alicyclic hydrocarbon random copolymer, method for producing the same, resin composition and molded article
A technology of random copolymer and resin composition, applied in the field of alicyclic hydrocarbon random copolymer, to achieve the effects of reducing heat resistance, low birefringence, and improving laser resistance
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Embodiment 1
[0163] 1,286 parts of dehydrated cyclohexane and 1.34 parts of a compound having 2 or more electron-donating atoms and a structure capable of forming a chelate were placed in a fully dried and nitrogen-substituted stainless steel autoclave with an electromagnetic stirring device. Ethylene glycol dibutyl ether, add 1.97 parts of n-butyllithium solution (15% hexane solution) under the condition of stirring at 50°C, and then add it continuously to it, and its composition is represented by weight ratio [styrene (St) / isoprene Alkene (Ip)] = (96.4 / 3.6) mixed monomers, start to polymerize. A total of 500 parts of mixed monomers were added dropwise over 4 hours. After completion of the dropwise addition, polymerization was carried out for 30 minutes under the same conditions, and then 0.46 parts of isopropanol was added to terminate the reaction, whereby a styrene-isoprene random copolymer was synthesized.
[0164] Added and mixed 358 parts of the obtained reaction solution, 96.5 par...
Embodiment 2
[0168] The polymerization reaction and the hydrogenation reaction were carried out in a similar sequence to that of Example 1, except that a mixed monomer whose monomer composition was (St / Ip)=(95 / 5) by weight ratio was used. Then, the obtained alicyclic hydrocarbon random copolymer was injection-molded to prepare a sample for birefringence measurement and a sample for light transmittance measurement. The results are shown in Table 1.
Embodiment 3
[0170] Polymerization and hydrogenation were carried out in a sequence similar to that of Example 2, except that 0.69 parts of ethylene glycol dimethyl ether was added instead of ethylene glycol dibutyl ether as a compound having more than 2 electron-donating atoms and having the ability to form a chelate compound of the structure of the substance. Then, the obtained alicyclic hydrocarbon random copolymer was injection-molded to prepare a sample for birefringence measurement and a sample for light transmittance measurement. The results are shown in Table 1.
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