• Synthesis of High Molecular Weight PPS and Its Properties
  • Park LS, Lee SC, Lee TH, Jeon JY
  • 고분자량 PPS의 합성 및 물성
  • 박이순, 이수창, 이태형, 전재영
Abstract
From the reaction condition study of linear high molecular weight poly(p-phenylene sulfide) (PPS), the optimum conditions were found to be monomer concentration 2.5 mol/L NMP, NaOH content as additive 0.01 ∼0.03mo1/1mol Na2S, and [Na2S]/[DCB]mol ratio 1.0l/l∼1/1.03. Under these reaction conditions, substitution of a small amount of 1,4-dichlorobenzene (DCB) with 1,2,4-trichlorobenzene (TCB), for example 0.005, 0.01, 0.02 mol TCB, gave branched type PPS with Mw of 25300, 49100, 144000g/mol, respectively. Branched type PPS which was competely soluble in 1-chloronaphthalene at 210℃ had lower Tm higher Tg and 25% lower degree of crystallinity compared to linear PPS.

선형 고분자량 PPS의 합성을 위한 중합 조건의 조사를 통하여 최적 조건은 단량체의 농도 2.5mole/L, 첨가제로서의 NaOH 투입량 0.01∼0.03mo1/1mol Na2S, 단량체 몰비 ([Na2S]/[DCB]) 1.01/1∼1/1.03로 나타났다. 선형 PPS의 중합조건을 토대로 가지형 PPS의 합성시 TCB의 함량이 증가됨에 따라 분자량(Mw)은 TCB가 Na2S 1 mole 대비 0.005, 0.01, 0.02mo1로 증가할수록 분자량(Mw)이 각각 25300, 49100 및 144000g/mo1로 현저히 증가하였다. TCB 단량체를 이용하여 210℃ 1-chloronaphthalene 용매에 가용인 성질을 가진 가지형 구조의 PPS를 합성하면 가공성의 향상(Tm의 감소), 내열성의 향상(Tg의 증가) 등의 이점이 있으며, 선형 PPS 대비 결정성의 감소는 약 25% 정도로 크게 나타나지 않았다.

Keywords: poly(p-phenylene sulfide); PPS; high molecular weight; branched type PPS

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  • Polymer(Korea) 폴리머
  • Frequency : Bimonthly(odd)
    ISSN 0379-153X(Print)
    ISSN 2234-8077(Online)
    Abbr. Polym. Korea
  • 2024 Impact Factor : 0.6
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This Article

  • 1997; 21(3): 369-374

    Published online May 25, 1997