Text this: Comparative study of poly(4-vinylpyridine) and polylactic acid-block-poly(2-vinylpyridine) nanocomposites on structural, morphological and electrochemical properties = Kajian perbandingan nanokomposit poli(4-vinilpiridine) dan polilaktik asid-blok-poli(2-vinilpiridine) ke atas sifat struktur, morfologi dan elektrokimia